Best Free Databases Tools

filess.io is a platform where you can create two databases with up to 10 MB per database of the following DBMS for free: MySQL, MariaDB, MongoDB, and PostgreSQL.

Labelled document. We read that on 2026-08-31 from https://filess.io, where it says: “Ship your full stack apps in seconds. Web Hosting, Managed Databases (MySQL, PostgreSQL, MongoDB, MariaDB & SQL Server) and Secure Tunnels.”. How we use this

Multi-model cloud database — The 'Start' plan offers 1GB of storage free, forever, and a free compute instance with 0.25 vCPU and 1 GB memory ($0.000/hr). Further instances are available from $0.021/hr.

Labelled document. We read that on 2026-08-31 from https://surrealdb.com/, where it says: “SurrealDB is a database and an agent memory layer. Documents, graphs, vectors, and SQL in one engine - and context for your AI agents wherever your data lives.”. How we use this

Spark plan, no payment method needed: Auth (50K MAU), Firestore Standard edition (1 GiB stored, 50K reads/day, 20K writes/day, 20K deletes/day), Realtime Database (100 simultaneous connections, 1 GB stored, 10 GB/month downloaded), Hosting (10 GB storage, 360 MB/day transfer), and no-cost Analytics, Crashlytics and Cloud Messaging. Firestore Enterprise on Spark includes 1 GiB stored, 10 GiB/month network egress, 40K write units/day, 50K read units/day, 50K real-time update units/day. Cloud Functions and Cloud Storage need the Blaze plan. Note — 2026-12-01: Firebase Spark projects that enabled Remote Config before September 1, 2026 can use it under the old terms until December 1, 2026. From December 1, 2026, the 100,000-fetches-a-day limit applies to them, with 30 days of full service from the first day they go over, then throttling unless they upgrade to Blaze. A Spark project that upgrades to Blaze before November 15, 2026 is not billed for Remote Config until February 1, 2027. Blaze projects from before September 1, 2026 start Remote Config billing on February 1, 2027. Source ↗

• If a Spark project exceeds a no-cost quota, that product is shut off for the project (all its apps) for the rest of the calendar month, unless you upgrade to Blaze. (From firebase.google.com/docs/projects/billing/firebase-pricing-plans, read 2026-10-05.)
• A Spark account can create a small number of projects, usually about 5-10. (From firebase.google.com/support/faq, read 2026-10-05.)
• Linking a Cloud Billing account to a Spark project, including one with $300 Google Cloud free trial credits, automatically upgrades it to the pay-as-you-go Blaze plan. (From firebase.google.com/docs/projects/billing/firebase-pricing-plans, read 2026-10-05.)
• On Spark, email-link sign-in is limited to 5 emails a day; sending more needs a billing account (Blaze). (From firebase.google.com/docs/auth/limits, read 2026-10-07.)
• Phone (SMS) sign-in is not available on the Spark plan; on Blaze each SMS sent is billed. (From firebase.google.com/pricing, read 2026-10-20.)
• Since September 1, 2026, Remote Config allows up to 100,000 fetch requests a day per Spark project at no cost. A Spark project that exceeds this limit gets 30 days of normal service, then is throttled unless it upgrades to Blaze. Blaze projects pay $0.06 per 10,000 requests above 100,000 a day, up to 10,000,000, and $0.01 per 10,000 above that. (From firebase.google.com/docs/remote-config/pricing, read 2026-10-17.)
• Spark projects that used Remote Config before September 1, 2026 are subject to the 100,000-fetches-a-day limit from December 1, 2026 until they upgrade to Blaze. Blaze projects that used Remote Config before September 1, 2026 start Remote Config billing on February 1, 2027. A Spark project that used Remote Config before September 1, 2026 and upgrades to Blaze before November 15, 2026 starts Remote Config billing on February 1, 2027. (From firebase.google.com/docs/remote-config/pricing, read 2026-10-17.)
• On the Blaze plan, all Gemini Developer API usage, including calls through Firebase AI Logic, is pay-as-you-go, and most projects must prepay. A project with no billing account (on Spark) can use the Gemini Developer API's free tier with no payment method. (From firebase.google.com/docs/ai-logic/pricing, read 2026-10-21.)
• From November 2, 2026, Firebase AI Logic requires App Check enforcement. (From firebase.google.com/docs/ai-logic/pricing, read 2026-10-21.)
• Firebase's Spark plan needs no credit card or other payment method. (From firebase.google.com/pricing, read 2026-10-22.)

Labelled document. We read that on 2026-08-31 from https://firebase.google.com/docs/firestore, where it says: “Use the flexible, scalable NoSQL cloud database from Google Cloud to store and sync data for client and server-side development.”. How we use this

Free 512 MB shared cluster (M0), always free, available on AWS/Azure/GCP. Includes Atlas Vector Search for AI/RAG applications

• Atlas automatically pauses Free (M0) clusters after 30 days of inactivity where there are zero connections to the cluster. (From mongodb.com/docs/atlas/reference/free-shared-limitations, read 2026-10-18.)
• A Free cluster allows at most 500 connections and 100 read and write operations per second; operations over that limit are queued. (From mongodb.com/docs/atlas/reference/free-shared-limitations, read 2026-10-18.)
• MongoDB Atlas's free M0 cluster needs no credit card. (From mongodb.com/resources/basics/databases/cloud-databases/free-cloud-database, read 2026-10-22.)
• An agent can create a MongoDB Atlas M0 cluster via the API without an account. A person must sign in to claim the cluster, which then becomes a standard Free cluster with no expiration. Unclaimed clusters pause after 2 days and delete after 7. (From mongodb.com/docs/atlas/tutorial/create-ephemeral-cluster, read 2026-10-22.)
• The Flex tier has a monthly base price of $8.00, which includes 5GB storage, 100 operations per second and unlimited data transfer. More operations per second cost extra by tier, and Flex clusters are capped at $30 per month. (From mongodb.com/docs/atlas/billing/atlas-flex-costs, read 2026-10-29.)
• Flex clusters limit total data storage to 5 GB and the number of read and write operations to 500 operations per second. (From mongodb.com/docs/atlas/reference/flex-limitations, read 2026-10-29.)
• Upgrading a Free cluster asks for payment information and starts billing. Changing from a Free cluster to a Flex cluster requires downtime. (From mongodb.com/docs/atlas/scale-cluster, read 2026-10-29.)

Labelled document. We read that on 2026-08-31 from https://www.mongodb.com/products/platform/atlas-database, where it says: “Find out how the document model eliminates operational complexity while ensuring unmatched resilience, scalability, and enterprise-grade security through the Atlas cloud database.”. How we use this

a fast and straightforward NoSQL cloud database service. With restdb.io you get schema, relations, automatic REST API (with MongoDB-like queries), and an efficient multi-user admin UI for working with data. The free plan allows 3 users, 2500 records, and 1 API request per second. The page we cite for restdb.io states in words that it is free, which confirms the price — the limits stated here come from our own record rather than from that page.

Labelled document. We read that on 2026-08-31 from https://restdb.io/, where it says: “Simple online NoSQL database backend with automatic APIs and low code JavaScript hooks”. How we use this

Vectorize is Cloudflare's vector database for Workers. Workers Free includes 30 million queried vector dimensions per month and 5 million stored vector dimensions (about 6,500 vectors of 768 dimensions, or about 3,250 vectors of 1,536 dimensions). It allows 100 indexes. Workers Paid includes 50 million queried dimensions per month and 10 million stored dimensions. Overage is $0.01 per million queried dimensions and $0.05 per 100 million stored dimensions. CPU, memory and active index hours are not billed. Each vector can have up to 1536 dimensions. Each index can hold up to 20 million vectors.

• Cloudflare counts queried vector dimensions as stored vectors plus queries, multiplied by dimensions. For example, 10,000 vectors with 384 dimensions and 100 queries gives (10,000 + 100) × 384 = 3.878 million queried vector dimensions. (From developers.cloudflare.com/vectorize/platform/pricing, read 2026-11-03.)
• Cloudflare says the Workers Free plan will always include Vectorize for prototyping and experimenting. (From developers.cloudflare.com/vectorize/platform/pricing, read 2026-11-03.)
• Cloudflare Vectorize's free plan needs no credit card. (From cloudflare.com/developer-platform/products/vectorize, read 2026-11-03.)
• Vectorize usage past the Free allowances requires the Workers Paid plan. That plan has a minimum charge of $5 per month per account. (From developers.cloudflare.com/workers/platform/pricing, read 2026-11-03.)

Labelled vector. We read that on 2026-11-03 from https://developers.cloudflare.com/vectorize/, where it says: “Vectorize is a globally distributed vector database that enables you to build full-stack, AI-powered applications with Cloudflare Workers.”. How we use this

Serverless vector database by Upstash. Free: 200M vectors × dimensions (about 130,000 vectors at the maximum 1,536 dimensions), 100 namespaces, 10K queries and updates a day, 1 GB of data

Labelled vector. We read that on 2026-08-31 from https://upstash.com/, where it says: “Serverless Redis, Vector and Search databases with low latency and pay-as-you-go pricing.”. How we use this

Postgres development platform: database, Auth, Storage, Realtime and Edge Functions. The Free plan is $0: unlimited API requests, 50,000 monthly active users, a 500 MB database on a shared CPU with 500 MB RAM, 5 GB egress plus 5 GB cached egress, 1 GB file storage, 500,000 Edge Function invocations, and Realtime with 200 concurrent connections and 2 million messages a month. Free projects are paused after 1 week of inactivity, with a limit of 2 active projects. Pro starts at $25 a month for the first project and includes $10 a month of compute credits, enough for one Micro instance.

• Supabase makes daily backups only for Pro, Team and Enterprise projects, so a free project has none, and Supabase recommends exporting it yourself with the CLI's db dump command. (From supabase.com/docs/guides/platform/backups, read 2026-10-05.)
• A paused project can be restored from the dashboard for 1 year. After that, only its backup file and Storage objects can be downloaded. (From supabase.com/docs/guides/platform/upgrading, read 2026-10-05.)
• Supabase notifies you when you exceed the Free Plan quota. Continued overuse brings restrictions that can include a read-only database, 402 responses to every API request, or paused projects. They lift when the quota refills next billing cycle or on upgrade to Pro. (From supabase.com/docs/guides/platform/billing-faq, read 2026-10-05.)
• Supabase's Free Plan needs no credit card; paid plans require one on file. (From supabase.com/docs/guides/platform/get-set-up-for-billing, read 2026-10-22.)

Labelled vector. We read that on 2026-08-31 from https://supabase.com/, where it says: “Build production-grade applications with a Postgres database, Authentication, instant APIs, Realtime, Functions, Storage and Vector embeddings.”. How we use this

Managed Milvus vector database — free tier: 5 GB storage, 2.5M vector compute units/month, up to 5 collections. Milvus open-source also free to self-host with no limits

Labelled vector. We read that on 2026-08-31 from https://zilliz.com/, where it says: “Zilliz offers a fully managed Vector Lakebase powered by Milvus, unifying real-time vector search, lake-scale discovery, and AI data operations.”. How we use this

Multi-model cloud database — The 'Start' plan offers 1GB of storage free, forever, and a free compute instance with 0.25 vCPU and 1 GB memory ($0.000/hr). Further instances are available from $0.021/hr.

Labelled vector. We read that on 2026-08-31 from https://surrealdb.com/, where it says: “SurrealDB is a database and an agent memory layer. Documents, graphs, vectors, and SQL in one engine - and context for your AI agents wherever your data lives.”. How we use this

Open-source AI-native embedding database (Apache 2.0). Chroma Cloud, its hosted service, is winding down: read-only from December 7, 2026, no reads from December 22, 2026. Until then, Chroma Cloud's Starter plan is $0 a month plus usage, with $5 in free credits. Write per GiB written $2.50, Storage per GiB per month $0.33, Query per TiB queried $0.0075, Network per GiB returned $0.09. Starter plan includes 10 databases and 10 team members.

• On Chroma Cloud, reaching a usage limit, whether yours or Chroma's, pauses the service until the limit is changed. (From trychroma.com/pricing, read 2026-10-07.)
• Chroma Cloud is winding down: it becomes read-only on December 7, 2026, and stops serving reads on December 22, 2026, so data must be exported before then. Open-source ChromaDB stays available under the Apache 2.0 license. (From trychroma.com/cloud-wind-down, read 2026-11-12.)

Labelled vector. We read that on 2026-08-31 from https://www.trychroma.com/, where it says: “Fast, serverless, and scalable infrastructure supporting vector, full-text, regex, and metadata search.”. How we use this

Serverless Redis — 500K commands/month (250MB data). Vector: 200M vectors × dimensions and 10K queries a day free. QStash: 1,000 messages/day free

• Free Redis databases unused for at least 30 days are archived after warning emails. Their data is backed up and can be restored into a new database from the console. (From upstash.com/docs/redis/help/faq, read 2026-10-06.)
• Adding the first payment method moves every free resource on the account to its paid plan: all Redis databases, plus QStash, Vector, Search and Blob. An account with a payment method cannot have free databases. (From upstash.com/docs/redis/overall/billing, read 2026-10-29.)
• Paid databases do not get the Free plan's data and command allowance. (From upstash.com/pricing/redis, read 2026-10-29.)
• Pay as You Go costs $0.20 per 100K commands. Storage past each database's first 1 GB is $0.25 per GB. Bandwidth past 200 GB a month is $0.03 per GB. (From upstash.com/pricing/redis, read 2026-10-29.)
• A Pay as You Go database can have a monthly budget. When the budget is reached the database is rate-limited rather than continuing to bill. Budgets are set per database; there is no account-wide budget. (From upstash.com/docs/redis/overall/billing, read 2026-10-29.)
• A free Upstash Redis database returns "ReplyError: ERR max requests limit exceeded" once it passes the monthly command limit. (From upstash.com/docs/redis/troubleshooting/max_requests_limit, read 2026-10-29.)
• An agent can create an Upstash Redis database with no signup, card or API key by a POST request to upstash.com/start-redis. It is deleted after 3 days unless a person claims it from the console link in the response. (From upstash.com/pricing, read 2026-10-22.)

Labelled vector. We read that on 2026-08-31 from https://upstash.com/, where it says: “Serverless Redis, Vector and Search databases with low latency and pay-as-you-go pricing.”. How we use this

Open-source vector database — self-hosted free. Cloud: permanent free tier with 1 cluster, 100,000 objects, 1 GB memory, 10 GB disk, 1 collection, up to 3 tenants, 2,000 embedding requests/day and 1,000 Query Agent requests/month. Paid cloud from $45/mo (Flex)

• A free Weaviate Cloud cluster is suspended after 7 days of inactivity, with its data kept, until you reactivate it. (From docs.weaviate.io/cloud/manage-clusters/create, read 2026-10-07.)
• A free cluster that stays inactive is permanently deleted after 30 days of total inactivity. (From docs.weaviate.io/cloud/manage-clusters/create, read 2026-10-07.)

Labelled vector. We read that on 2026-08-31 from https://weaviate.io/pricing, where it says: “Compare pricing options for our different levels of vector database services and solutions.”. How we use this

The free plan includes 1 Developer, API/Functions: 1/sec, 500/day, 1 Worker per queue, Worker timeout 30s, 150 MB Database Storage, 1 GB File Storage, 1 Space Chat and Email Support. No Credit Card Required. Note — effective between 2026-07-11 and 2026-08-28: The free tier now has significantly reduced API call limits (1/sec, 500/day). Previously 60/minute. Source ↗

Labelled backend_platform. We read that on 2026-08-31 from https://codehooks.io/docs, where it says: “Codehooks.io is the complete backend for webhooks and automations. Receive, store, process, and deliver webhooks with a built-in database, queues, cron, and retries behind every endpoint.”. How we use this

Reactive backend — 1M function calls/month, 0.5 GB database + vector storage, 1 GB file storage, real-time sync

Labelled backend_platform. We read that on 2026-08-31 from https://www.convex.dev/, where it says: “Convex is the reactive backend platform that keeps up with you and your agents.”. How we use this

Postgres development platform: database, Auth, Storage, Realtime and Edge Functions. The Free plan is $0: unlimited API requests, 50,000 monthly active users, a 500 MB database on a shared CPU with 500 MB RAM, 5 GB egress plus 5 GB cached egress, 1 GB file storage, 500,000 Edge Function invocations, and Realtime with 200 concurrent connections and 2 million messages a month. Free projects are paused after 1 week of inactivity, with a limit of 2 active projects. Pro starts at $25 a month for the first project and includes $10 a month of compute credits, enough for one Micro instance.

• Supabase makes daily backups only for Pro, Team and Enterprise projects, so a free project has none, and Supabase recommends exporting it yourself with the CLI's db dump command. (From supabase.com/docs/guides/platform/backups, read 2026-10-05.)
• A paused project can be restored from the dashboard for 1 year. After that, only its backup file and Storage objects can be downloaded. (From supabase.com/docs/guides/platform/upgrading, read 2026-10-05.)
• Supabase notifies you when you exceed the Free Plan quota. Continued overuse brings restrictions that can include a read-only database, 402 responses to every API request, or paused projects. They lift when the quota refills next billing cycle or on upgrade to Pro. (From supabase.com/docs/guides/platform/billing-faq, read 2026-10-05.)
• Supabase's Free Plan needs no credit card; paid plans require one on file. (From supabase.com/docs/guides/platform/get-set-up-for-billing, read 2026-10-22.)

Labelled backend_platform. We read that on 2026-08-31 from https://supabase.com/, where it says: “Build production-grade applications with a Postgres database, Authentication, instant APIs, Realtime, Functions, Storage and Vector embeddings.”. How we use this

Open-source backend with Postgres and Hasura GraphQL, plus Auth, Storage and Functions. The Starter plan is $0 a month: 1 GB database, 1 GB storage and 5 GB egress, with functions, realtime APIs and unlimited users. It is limited to 1 project, and the project is paused after 1 week of inactivity. Pro starts at $25 a month with $15 of compute credits, a 10 GB database, 50 GB storage and 50 GB egress.

Labelled backend_platform. We read that on 2026-08-31 from https://nhost.io/, where it says: “Nhost is a managed backend platform with Postgres, GraphQL, Auth, Storage, and serverless Functions.”. How we use this

Serverless Postgres with branching — free tier includes 100 CU-hours/month per project, 1 GB of Postgres storage per project (20 GB total across all projects), 5 GB of public network transfer per project per month, up to 100 projects, 10 branches per project, Neon Auth (60K MAU), auto-scaling up to 2 CU, scale-to-zero, 5 GB of Object Storage, and Functions (10 active capacity-hours, 400 waiting capacity-hours, 1M invocations). No credit card is required. The AI Gateway (one Neon credential for models from OpenAI, Anthropic, Google and others) is available on every plan, including Free. It requires a card and a $5 minimum purchase of prepaid credits in the Neon Console. The Free plan otherwise remains unchanged. Model prices match each provider's list price with no markup.

• Neon's Free plan needs no credit card. (From neon.com/pricing, read 2026-10-22.)
• An agent can create a Neon Postgres project without a Neon account. Unclaimed projects expire in 72 hours and are limited to 100 MB storage and 1 GB transfer. A person claims the project to keep it. (From neon.com/docs/reference/claimable-neon, read 2026-10-22.)
• On the Free plan, scale to zero can't be disabled: computes suspend after 5 minutes of inactivity. (From neon.com/docs/introduction/plans, read 2026-10-04.)
• Neon doesn't pause Free projects for inactivity: an idle database starts again on the next query, with no restore step. (From neon.com/pricing, read 2026-11-01.)
• Running out of CU-hours or network transfer suspends the compute until the next billing period or an upgrade. (From neon.com/docs/introduction/plans, read 2026-10-04.)
• Neon's Free plan provides 100 CU-hours per project per month. One CU allocates about 4 GB of RAM, and 100 CU-hours is enough to run a 0.25 CU compute (about 1 GB of RAM) for 400 hours, about 17 days of continuous running. All computes in a project count toward usage, including those for each branch and any read replicas. (From neon.com/docs/introduction/plans, read 2026-11-03.)
• At the storage cap, inserts, updates and deletes fail until space is freed or the plan is upgraded. (From neon.com/docs/introduction/plans, read 2026-10-04.)
• Neon's Azure East US 2, West US 3, and Germany West Central regions no longer accept new projects as of April 7, 2026; Free-plan projects there inactive for 90+ days may be deleted after October 5, 2026. (From neon.com/docs/import/azure-regions-deprecation, read 2026-10-07.)
• Platforms that create databases for their users can apply for the Agent Plan. You must have a Neon Scale plan with a credit card on file and get Neon's approval. Neon sponsors the databases for your free-tier users. Paid usage gets up to $25,000 in credits and compute at $0.106 per compute-unit hour. (From neon.com/docs/introduction/agent-plan.md, read 2026-10-11.)
• Neon gives $20 in free credits to try paid features, claimed through a promo link in the Neon Console. (From neon.com/pricing.md, read 2026-10-11.)
• Neon's pricing page offers startups up to $100k in credits. The startup page describes the Databricks Startup Program, up to $200K in credits for Neon and Databricks for qualifying startups. (From neon.com/startups, read 2026-10-11.)
• Neon's open source programme: Neon reviews each application and decides per project whether to support it with a monthly cash sponsorship through GitHub Sponsors, Neon credits, or both, and how much. Cash sponsorships come from a pool of at least $200,000 a year and run for six-month terms that do not renew automatically. Supported projects can receive up to $5,000 in Neon credits and up to $5,000 in Neon AI Gateway credits. It requires an OSI-approved license and a GitHub Sponsors profile. (From neon.com/programs/open-source.md, read 2026-10-29.)
• After the free plan, Neon's paid plans bill only for usage, with no monthly minimum: Launch charges $0.106 per CU-hour of compute and Scale $0.222, both charge $0.35 per GB-month of storage, extra branches cost $1.50 per branch-month, and network transfer beyond 500 GB per project costs $0.10 per GB. (From neon.com/pricing.md, read 2026-10-15.)
• Neon Realtime has been in public beta since 2026-10-15. It provides live updates from SQL queries without polling and is free during the beta. Compute and egress are billed under the plan; beta runs in four AWS regions: us-east-1, us-east-2, eu-central-1 and ap-southeast-1. (From neon.com/docs/realtime/overview, read 2026-10-16.)
• Neon archives branches older than 14 days and not accessed for 24 hours. Unarchiving happens automatically when a branch is connected to or queried. Branches with large amounts of data may connect and query slower while unarchiving. (From neon.com/docs/guides/branch-archiving, read 2026-10-29.)

Labelled backend_platform. We read that on 2026-08-31 from https://neon.com/, where it says: “The backend for apps and agents. Build with Lakebase Postgres, Auth, Functions, Storage, and an AI Gateway: instant, branchable, serverless.”. How we use this

Spark plan, no payment method needed: Auth (50K MAU), Firestore Standard edition (1 GiB stored, 50K reads/day, 20K writes/day, 20K deletes/day), Realtime Database (100 simultaneous connections, 1 GB stored, 10 GB/month downloaded), Hosting (10 GB storage, 360 MB/day transfer), and no-cost Analytics, Crashlytics and Cloud Messaging. Firestore Enterprise on Spark includes 1 GiB stored, 10 GiB/month network egress, 40K write units/day, 50K read units/day, 50K real-time update units/day. Cloud Functions and Cloud Storage need the Blaze plan. Note — 2026-12-01: Firebase Spark projects that enabled Remote Config before September 1, 2026 can use it under the old terms until December 1, 2026. From December 1, 2026, the 100,000-fetches-a-day limit applies to them, with 30 days of full service from the first day they go over, then throttling unless they upgrade to Blaze. A Spark project that upgrades to Blaze before November 15, 2026 is not billed for Remote Config until February 1, 2027. Blaze projects from before September 1, 2026 start Remote Config billing on February 1, 2027. Source ↗

• If a Spark project exceeds a no-cost quota, that product is shut off for the project (all its apps) for the rest of the calendar month, unless you upgrade to Blaze. (From firebase.google.com/docs/projects/billing/firebase-pricing-plans, read 2026-10-05.)
• A Spark account can create a small number of projects, usually about 5-10. (From firebase.google.com/support/faq, read 2026-10-05.)
• Linking a Cloud Billing account to a Spark project, including one with $300 Google Cloud free trial credits, automatically upgrades it to the pay-as-you-go Blaze plan. (From firebase.google.com/docs/projects/billing/firebase-pricing-plans, read 2026-10-05.)
• On Spark, email-link sign-in is limited to 5 emails a day; sending more needs a billing account (Blaze). (From firebase.google.com/docs/auth/limits, read 2026-10-07.)
• Phone (SMS) sign-in is not available on the Spark plan; on Blaze each SMS sent is billed. (From firebase.google.com/pricing, read 2026-10-20.)
• Since September 1, 2026, Remote Config allows up to 100,000 fetch requests a day per Spark project at no cost. A Spark project that exceeds this limit gets 30 days of normal service, then is throttled unless it upgrades to Blaze. Blaze projects pay $0.06 per 10,000 requests above 100,000 a day, up to 10,000,000, and $0.01 per 10,000 above that. (From firebase.google.com/docs/remote-config/pricing, read 2026-10-17.)
• Spark projects that used Remote Config before September 1, 2026 are subject to the 100,000-fetches-a-day limit from December 1, 2026 until they upgrade to Blaze. Blaze projects that used Remote Config before September 1, 2026 start Remote Config billing on February 1, 2027. A Spark project that used Remote Config before September 1, 2026 and upgrades to Blaze before November 15, 2026 starts Remote Config billing on February 1, 2027. (From firebase.google.com/docs/remote-config/pricing, read 2026-10-17.)
• On the Blaze plan, all Gemini Developer API usage, including calls through Firebase AI Logic, is pay-as-you-go, and most projects must prepay. A project with no billing account (on Spark) can use the Gemini Developer API's free tier with no payment method. (From firebase.google.com/docs/ai-logic/pricing, read 2026-10-21.)
• From November 2, 2026, Firebase AI Logic requires App Check enforcement. (From firebase.google.com/docs/ai-logic/pricing, read 2026-10-21.)
• Firebase's Spark plan needs no credit card or other payment method. (From firebase.google.com/pricing, read 2026-10-22.)

Labelled backend_platform. We read that on 2026-08-31 from https://firebase.google.com/docs/firestore, where it says: “Use the flexible, scalable NoSQL cloud database from Google Cloud to store and sync data for client and server-side development.”. How we use this

Distributed SQL database for time-series and IoT — free cloud tier (CRFREE): 2 vCPUs, 2 GB RAM, 8 GB storage. One free cluster per org. No credit card required

Labelled analytical. We read that on 2026-08-31 from https://cratedb.com/, where it says: “CrateDB is the operational analytics database for fast-moving data. Ingest millions of events per second and query billions of records in milliseconds. Standard SQL, no pre-aggregation, no schema redesign.”. How we use this

Always Free: 1 TiB queries/month, 10 GiB storage. Serverless data warehouse with SQL, ML, and BI built in. No infrastructure to manage

• Google Cloud's Free Tier requires a billing account. (From docs.cloud.google.com/free/docs/free-cloud-features, read 2026-10-07.)
• Usage beyond the Free Tier's monthly limits is billed at standard rates. (From docs.cloud.google.com/free/docs/free-cloud-features, read 2026-10-07.)
• The BigQuery sandbox needs no credit card or billing account. It includes 1 TiB of queries a month, and its tables expire after 60 days. (From cloud.google.com/bigquery/docs/sandbox, read 2026-10-12.)

Labelled analytical. We read that on 2026-08-31 from https://cloud.google.com/bigquery/pricing, where it says: “BigQuery is a serverless data analytics platform.”. How we use this

Managed Redis — 30 MB memory, single database, shared deployment. Best-effort SLA, community support

Labelled kv_cache. We read that on 2026-08-31 from https://redis.io/about/, where it says: “Learn about Redis, the fast in-memory database for caching, vector search, and NoSQL.”. How we use this

Key-value store at the edge — Free plan includes 100,000 keys read/day, 1,000 keys written/day, 1,000 keys deleted/day, 1,000 list requests/day, and 1 GB stored data. All limits reset daily at 00:00 UTC.

Labelled kv_cache. We read that on 2026-08-31 from https://developers.cloudflare.com/kv/, where it says: “Workers KV is a global, low-latency, key-value data store for building dynamic and performant APIs and websites.”. How we use this

Serverless Redis — 500K commands/month (250MB data). Vector: 200M vectors × dimensions and 10K queries a day free. QStash: 1,000 messages/day free

• Free Redis databases unused for at least 30 days are archived after warning emails. Their data is backed up and can be restored into a new database from the console. (From upstash.com/docs/redis/help/faq, read 2026-10-06.)
• Adding the first payment method moves every free resource on the account to its paid plan: all Redis databases, plus QStash, Vector, Search and Blob. An account with a payment method cannot have free databases. (From upstash.com/docs/redis/overall/billing, read 2026-10-29.)
• Paid databases do not get the Free plan's data and command allowance. (From upstash.com/pricing/redis, read 2026-10-29.)
• Pay as You Go costs $0.20 per 100K commands. Storage past each database's first 1 GB is $0.25 per GB. Bandwidth past 200 GB a month is $0.03 per GB. (From upstash.com/pricing/redis, read 2026-10-29.)
• A Pay as You Go database can have a monthly budget. When the budget is reached the database is rate-limited rather than continuing to bill. Budgets are set per database; there is no account-wide budget. (From upstash.com/docs/redis/overall/billing, read 2026-10-29.)
• A free Upstash Redis database returns "ReplyError: ERR max requests limit exceeded" once it passes the monthly command limit. (From upstash.com/docs/redis/troubleshooting/max_requests_limit, read 2026-10-29.)
• An agent can create an Upstash Redis database with no signup, card or API key by a POST request to upstash.com/start-redis. It is deleted after 3 days unless a person claims it from the console link in the response. (From upstash.com/pricing, read 2026-10-22.)

Labelled kv_cache. We read that on 2026-08-31 from https://upstash.com/, where it says: “Serverless Redis, Vector and Search databases with low latency and pay-as-you-go pricing.”. How we use this

Distributed SQL database for time-series and IoT — free cloud tier (CRFREE): 2 vCPUs, 2 GB RAM, 8 GB storage. One free cluster per org. No credit card required

Labelled relational. We read that on 2026-08-31 from https://cratedb.com/, where it says: “CrateDB is the operational analytics database for fast-moving data. Ingest millions of events per second and query billions of records in milliseconds. Standard SQL, no pre-aggregation, no schema redesign.”. How we use this

Edge SQLite — 100 databases, 5 GB storage, 500M rows read/month, 10M rows written/month free. On 2026-10-02 Turso announced that Supabase is acquiring it. Turso says the service keeps running and that databases, APIs and workflows continue as they do today.

• Turso's free plan needs no credit card. (From turso.tech/pricing, read 2026-10-22.)
• The Developer plan costs $5.99 per month, or $4.99 per month when billed yearly. It includes 9GB storage, 2.5 billion rows read, 25 million rows written and 10GB syncs per month. Overage rates are $0.75 per GB storage, $1 per billion rows read, $1 per million rows written and $0.35 per GB syncs. (From turso.tech/pricing.md, read 2026-10-29.)
• Overage billing on a paid plan is off by default. Enabling it lets you go over your plan's included limits and pay per usage. (From turso.tech/pricing.md, read 2026-10-29.)
• On the Free plan, or on a paid plan with Overages off, your databases are blocked once you exceed the limit on any single metric. (From turso.tech/pricing, read 2026-10-29.)
• Databases on the free plan are archived after 10 days of inactivity. The CLI command turso group unarchive <group-name> unarchives them. (From docs.turso.tech/cli/group/unarchive, read 2026-10-29.)

Labelled relational. We read that on 2026-08-31 from https://turso.tech/, where it says: “A full SQLite drop-in replacement, built for the agentic future.”. How we use this

filess.io is a platform where you can create two databases with up to 10 MB per database of the following DBMS for free: MySQL, MariaDB, MongoDB, and PostgreSQL.

Labelled relational. We read that on 2026-08-31 from https://filess.io, where it says: “Ship your full stack apps in seconds. Web Hosting, Managed Databases (MySQL, PostgreSQL, MongoDB, MariaDB & SQL Server) and Secure Tunnels.”. How we use this

Aurora PostgreSQL Serverless on AWS Free Tier — managed PostgreSQL-compatible database with automatic scaling. Free plan: up to 4 ACUs and 1 GiB of storage per cluster, paid from AWS credits ($100 at sign-up, up to $100 more). The Free plan closes after 6 months or when the credits run out

Labelled relational. We read that on 2026-08-31 from https://aws.amazon.com/rds/aurora/, where it says: “Amazon Aurora is a global-scale relational database service built for the cloud with full MySQL and PostgreSQL compatibility.”. How we use this

Postgres development platform: database, Auth, Storage, Realtime and Edge Functions. The Free plan is $0: unlimited API requests, 50,000 monthly active users, a 500 MB database on a shared CPU with 500 MB RAM, 5 GB egress plus 5 GB cached egress, 1 GB file storage, 500,000 Edge Function invocations, and Realtime with 200 concurrent connections and 2 million messages a month. Free projects are paused after 1 week of inactivity, with a limit of 2 active projects. Pro starts at $25 a month for the first project and includes $10 a month of compute credits, enough for one Micro instance.

• Supabase makes daily backups only for Pro, Team and Enterprise projects, so a free project has none, and Supabase recommends exporting it yourself with the CLI's db dump command. (From supabase.com/docs/guides/platform/backups, read 2026-10-05.)
• A paused project can be restored from the dashboard for 1 year. After that, only its backup file and Storage objects can be downloaded. (From supabase.com/docs/guides/platform/upgrading, read 2026-10-05.)
• Supabase notifies you when you exceed the Free Plan quota. Continued overuse brings restrictions that can include a read-only database, 402 responses to every API request, or paused projects. They lift when the quota refills next billing cycle or on upgrade to Pro. (From supabase.com/docs/guides/platform/billing-faq, read 2026-10-05.)
• Supabase's Free Plan needs no credit card; paid plans require one on file. (From supabase.com/docs/guides/platform/get-set-up-for-billing, read 2026-10-22.)

Labelled relational. We read that on 2026-08-31 from https://supabase.com/, where it says: “Build production-grade applications with a Postgres database, Authentication, instant APIs, Realtime, Functions, Storage and Vector embeddings.”. How we use this

SQLite at the edge — 5M rows read/day, 100K rows written/day, 5 GB total storage. Resets daily at midnight UTC

• On the Free plan, once the account reaches its daily read or write limit, D1 refuses queries and returns errors until the limits reset at 00:00 UTC; upgrading to Workers Paid removes the limits. (From developers.cloudflare.com/d1/platform/pricing, read 2026-10-20.)
• On the Free plan a single D1 database can hold at most 500 MB, and an account can have at most 10 databases, within the 5 GB account total. (From developers.cloudflare.com/d1/platform/limits, read 2026-10-20.)
• Cloudflare D1's free plan needs no credit card. (From cloudflare.com/developer-platform/products/d1, read 2026-10-22.)
• D1 usage past Free limits requires the Workers Paid plan. That plan has a minimum charge of $5 per month per account. (From developers.cloudflare.com/workers/platform/pricing, read 2026-10-29.)
• The Workers Paid plan includes 25 billion rows read, 50 million rows written, and 5 GB storage monthly. Rows read overage is $0.001 per million. Rows written overage is $1.00 per million. Storage overage is $0.75 per GB-mo. There are no egress charges. (From developers.cloudflare.com/d1/platform/pricing, read 2026-10-29.)
• Time Travel restores a database from up to 30 days ago on Workers Paid and 7 days on Free. The paid plan has a 10 GB maximum database size and 1 TB storage per account. (From developers.cloudflare.com/d1/platform/limits, read 2026-10-29.)

Labelled relational. We read that on 2026-08-31 from https://developers.cloudflare.com/d1/, where it says: “Build serverless SQL databases on Cloudflare”. How we use this

Open-source Postgres platform (Apache 2.0) with copy-on-write branching and scale-to-zero. Self-hosted on Kubernetes — free forever. The managed platform, Xata Cloud, is paid: from $0.012 an hour plus $0.28 per GB-month of storage, billed by the minute, with a 14-day free trial.

• Xata announced on November 9, 2026 that it is joining ClickHouse. Xata continues to accept new sign-ups and customers can use it as usual. Xata will eventually migrate customers to ClickHouse Managed Postgres after feature parity. Xata did not give a date for the migration. (From xata.io/blog/xata-is-joining-clickhouse, read 2026-11-10.)

Labelled relational. We read that on 2026-08-31 from https://xata.io/, where it says: “Postgres platform with instant branching and scale-to-zero compute.”. How we use this

Open-source backend with Postgres and Hasura GraphQL, plus Auth, Storage and Functions. The Starter plan is $0 a month: 1 GB database, 1 GB storage and 5 GB egress, with functions, realtime APIs and unlimited users. It is limited to 1 project, and the project is paused after 1 week of inactivity. Pro starts at $25 a month with $15 of compute credits, a 10 GB database, 50 GB storage and 50 GB egress.

Labelled relational. We read that on 2026-08-31 from https://nhost.io/, where it says: “Nhost is a managed backend platform with Postgres, GraphQL, Auth, Storage, and serverless Functions.”. How we use this

Serverless Postgres with branching — free tier includes 100 CU-hours/month per project, 1 GB of Postgres storage per project (20 GB total across all projects), 5 GB of public network transfer per project per month, up to 100 projects, 10 branches per project, Neon Auth (60K MAU), auto-scaling up to 2 CU, scale-to-zero, 5 GB of Object Storage, and Functions (10 active capacity-hours, 400 waiting capacity-hours, 1M invocations). No credit card is required. The AI Gateway (one Neon credential for models from OpenAI, Anthropic, Google and others) is available on every plan, including Free. It requires a card and a $5 minimum purchase of prepaid credits in the Neon Console. The Free plan otherwise remains unchanged. Model prices match each provider's list price with no markup.

• Neon's Free plan needs no credit card. (From neon.com/pricing, read 2026-10-22.)
• An agent can create a Neon Postgres project without a Neon account. Unclaimed projects expire in 72 hours and are limited to 100 MB storage and 1 GB transfer. A person claims the project to keep it. (From neon.com/docs/reference/claimable-neon, read 2026-10-22.)
• On the Free plan, scale to zero can't be disabled: computes suspend after 5 minutes of inactivity. (From neon.com/docs/introduction/plans, read 2026-10-04.)
• Neon doesn't pause Free projects for inactivity: an idle database starts again on the next query, with no restore step. (From neon.com/pricing, read 2026-11-01.)
• Running out of CU-hours or network transfer suspends the compute until the next billing period or an upgrade. (From neon.com/docs/introduction/plans, read 2026-10-04.)
• Neon's Free plan provides 100 CU-hours per project per month. One CU allocates about 4 GB of RAM, and 100 CU-hours is enough to run a 0.25 CU compute (about 1 GB of RAM) for 400 hours, about 17 days of continuous running. All computes in a project count toward usage, including those for each branch and any read replicas. (From neon.com/docs/introduction/plans, read 2026-11-03.)
• At the storage cap, inserts, updates and deletes fail until space is freed or the plan is upgraded. (From neon.com/docs/introduction/plans, read 2026-10-04.)
• Neon's Azure East US 2, West US 3, and Germany West Central regions no longer accept new projects as of April 7, 2026; Free-plan projects there inactive for 90+ days may be deleted after October 5, 2026. (From neon.com/docs/import/azure-regions-deprecation, read 2026-10-07.)
• Platforms that create databases for their users can apply for the Agent Plan. You must have a Neon Scale plan with a credit card on file and get Neon's approval. Neon sponsors the databases for your free-tier users. Paid usage gets up to $25,000 in credits and compute at $0.106 per compute-unit hour. (From neon.com/docs/introduction/agent-plan.md, read 2026-10-11.)
• Neon gives $20 in free credits to try paid features, claimed through a promo link in the Neon Console. (From neon.com/pricing.md, read 2026-10-11.)
• Neon's pricing page offers startups up to $100k in credits. The startup page describes the Databricks Startup Program, up to $200K in credits for Neon and Databricks for qualifying startups. (From neon.com/startups, read 2026-10-11.)
• Neon's open source programme: Neon reviews each application and decides per project whether to support it with a monthly cash sponsorship through GitHub Sponsors, Neon credits, or both, and how much. Cash sponsorships come from a pool of at least $200,000 a year and run for six-month terms that do not renew automatically. Supported projects can receive up to $5,000 in Neon credits and up to $5,000 in Neon AI Gateway credits. It requires an OSI-approved license and a GitHub Sponsors profile. (From neon.com/programs/open-source.md, read 2026-10-29.)
• After the free plan, Neon's paid plans bill only for usage, with no monthly minimum: Launch charges $0.106 per CU-hour of compute and Scale $0.222, both charge $0.35 per GB-month of storage, extra branches cost $1.50 per branch-month, and network transfer beyond 500 GB per project costs $0.10 per GB. (From neon.com/pricing.md, read 2026-10-15.)
• Neon Realtime has been in public beta since 2026-10-15. It provides live updates from SQL queries without polling and is free during the beta. Compute and egress are billed under the plan; beta runs in four AWS regions: us-east-1, us-east-2, eu-central-1 and ap-southeast-1. (From neon.com/docs/realtime/overview, read 2026-10-16.)
• Neon archives branches older than 14 days and not accessed for 24 hours. Unarchiving happens automatically when a branch is connected to or queried. Branches with large amounts of data may connect and query slower while unarchiving. (From neon.com/docs/guides/branch-archiving, read 2026-10-29.)

Labelled relational. We read that on 2026-08-31 from https://neon.com/, where it says: “The backend for apps and agents. Build with Lakebase Postgres, Auth, Functions, Storage, and an AI Gateway: instant, branchable, serverless.”. How we use this

Multi-model cloud database — The 'Start' plan offers 1GB of storage free, forever, and a free compute instance with 0.25 vCPU and 1 GB memory ($0.000/hr). Further instances are available from $0.021/hr.

Labelled relational. We read that on 2026-08-31 from https://surrealdb.com/, where it says: “SurrealDB is a database and an agent memory layer. Documents, graphs, vectors, and SQL in one engine - and context for your AI agents wherever your data lives.”. How we use this

Postgres for multi-tenant apps — 1 GB storage, 50M serverless query tokens, 500 max connections. Unlimited databases and tenant DBs. Always-on (no cold starts)

Labelled relational. We read that on 2026-08-31 from https://www.thenile.dev/, where it says: “Postgres re-engineered for multi-tenant apps.”. How we use this

Managed PostgreSQL, MySQL, Valkey (Redis-compatible), Apache Kafka, or OpenSearch — one free service of each type per organization. PostgreSQL and MySQL: 1 CPU, 1 GB RAM, 1 GB disk; PostgreSQL has 20 connections and no connection pooling. Valkey: 1 CPU, 1 GB RAM. Apache Kafka: 250 KiB/s ingress and 250 KiB/s egress, up to 5 topics with two partitions each. OpenSearch: 4 GB RAM, 20 GB storage. No credit card, no time limit. Developer plan for PostgreSQL is $5 a month with 8 GB storage.

• Aiven may power off a free service that has no usage in its first few hours, or that has no continuing activity. Aiven sends a notification before powering off an inactive service. The service can be powered back on. (From aiven.io/docs/platform/concepts/service-pricing, read 2026-10-18.)

Labelled relational. We read that on 2026-08-31 from https://aiven.io/postgresql, where it says: “Aiven for PostgreSQL - Managed Postgres database service with Postgres extensions, database forking, connection pooling.”. How we use this

Multi-model cloud database — The 'Start' plan offers 1GB of storage free, forever, and a free compute instance with 0.25 vCPU and 1 GB memory ($0.000/hr). Further instances are available from $0.021/hr.

Labelled graph. We read that on 2026-08-31 from https://surrealdb.com/, where it says: “SurrealDB is a database and an agent memory layer. Documents, graphs, vectors, and SQL in one engine - and context for your AI agents wherever your data lives.”. How we use this

Graph-relational database (formerly EdgeDB) — Free tier: 1/4 compute unit ( 1/2 GiB RAM, 1/16 vCPU ), Up to 1GB of disk space

Instant GraphQL API engine over any database — Includes: Unlimited models, at any scale 1 supergraph developer Observability: 15-minute retention API GraphQL API (filtering, pagination, sorting, aggregations) Relay API Nested filtering Nested aggregations Nested pagination Nested sorting API versioning Field & entity level authorization Infrastructure API requests/month - No limit Concurrent API users - No limit Autoscaling Zero cold-start Global Edge network Intelligent geo routing DDoS protection Connectors Database connectors Code connectors API connectors DIY: build & connect your own connector Optional hosting for third-party & code connectors - $0.075/vCPU-hour, $0.0075/GiB-hour Console Supergraph explorer & registry Query plan & trace viewer CI/CD Breaking change detection Immutable builds & build URLs Local development Self-hosting with v3 graphql-engine Collaboration Schema registry & changelog

Global query cache and connection pool for Prisma ORM, retiring December 1, 2026. Every plan includes 60,000 cache operations a month, with no overage rate on Free. Also available: Prisma Postgres, which continues after that date, has a Free plan with 200,000 operations a month, 2 GB of storage, 50 databases and 10 pooled connections, with no credit card required.

• Prisma Accelerate, including hosted Accelerate connections for Prisma Postgres, is retired on December 1, 2026, and the Prisma Console no longer offers Accelerate for new setups. (From prisma.io/changelog/2026-10-02, read 2026-10-12.)