Best Free Databases Tools

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

Multi-model cloud database — 1 GB storage, 0.25 vCPU, 512 MB memory free. Supports SQL-like queries, graph relations, document storage, real-time subscriptions. Includes team collaboration and RBAC Note — 2026-04-12: Free tier memory reduced from 1 GB to 512 MB Source ↗

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

Managed PostgreSQL, MySQL, or Valkey (Redis-compatible) — 1 CPU, 1 GB RAM, 1 GB disk per service. No time limit

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

Superseded: As of 2026-09-03, supabase.com/pricing reads: The free tier includes unlimited API requests, 50,000 monthly active users, 500 MB database size, 5 GB egress, 1 GB file storage. Free projects are paused after 1 week of inactivity. Paid plans include $10/mo in compute credits. We are not publishing our stored Supabase terms beside it — our own pricing change record, discovered 2026-09-03, names them as the previous ones. Read what we recorded ↓ Note — discovered 2026-09-03: The free tier now has a 1 week inactivity pause, and compute is now a separate cost with a $10/month credit on paid plans. The free tier also has a spend cap. Source ↗

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

Open-source Postgres platform (Apache 2.0) with copy-on-write branching and scale-to-zero. Self-hosted on Kubernetes — free forever. Managed platform is now paid (compute + storage billed hourly); 14-day free trial with $100 credit on the commercial tier. Note — 2026-04-19: Xata pivoted to open source (Apache 2.0) in April 2026. SaaS free tier (15 GB storage, 75 req/s, 10 branches, daily backups) retired. Free-forever usage now requires self-hosting on Kubernetes; the managed platform is paid with a 14-day free trial and $100 credit. Source ↗

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

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

Free Postgres database (0.25 vCPU, 1 GB RAM, 1 GB storage, 5 hr/month runtime). No free compute tier — Pro plan starts at $29/month with $10 included compute.

Labelled relational. We read that on 2026-08-31 from https://www.koyeb.com/pricing, where it says: “Serverless Postgres — Fully managed, highly available, and scalable serverless Postgres databases billed by the second.”. How we use this

Aurora PostgreSQL Serverless on AWS Free Tier — managed PostgreSQL-compatible database with automatic scaling. Free plan: up to 4 ACUs per cluster, 1 GB storage. New accounts also get $100–200 in AWS credits for 12 months

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

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

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

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

Edge SQLite — 100 databases, 5 GB storage, 500M rows read/month, 10M rows written/month free

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

Serverless Postgres with branching — free tier includes 100 CU-hours/month per project, 0.5 GB storage per project, up to 100 projects, 10 branches per project, Neon Auth (60K MAU), auto-scaling up to 2 CU, scale-to-zero

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

Open-source Firebase alternative with Postgres + Hasura GraphQL — 1 GB database, 1 GB storage, 5 GB bandwidth free Note — discovered 2026-09-07: The free tier now pauses projects after 1 week of inactivity. Source ↗

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

Free serverless distributed SQL — 50M Request Units + 10 GiB storage/month, scales to zero

Labelled relational. We read that on 2026-08-31 from https://www.cockroachlabs.com/, where it says: “CockroachDB is a cloud-agnostic, AI-native, PostgreSQL-compatible data platform built for modern applications.”. How we use this

Multi-model cloud database — 1 GB storage, 0.25 vCPU, 512 MB memory free. Supports SQL-like queries, graph relations, document storage, real-time subscriptions. Includes team collaboration and RBAC Note — 2026-04-12: Free tier memory reduced from 1 GB to 512 MB Source ↗

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 database cloud service — free tier: single database, up to 200,000 nodes and 400,000 relationships. Full Cypher query language support. No credit card required

Labelled graph. We read that on 2026-08-31 from https://neo4j.com/, where it says: “Connect data as it's stored with Neo4j. Perform powerful, complex queries at scale and speed with our graph data platform.”. 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

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

Embedded vector database — OSS: fully free, runs locally or in your cloud, no limits. Cloud: $100 in one-time free credits for serverless managed offering. Usage-based pricing after credits Best for open source projects and unlimited usage needs.

Labelled analytical. We read that on 2026-08-31 from https://docs.lancedb.com/, where it says: “Multimodal lakehouse for AI.”. How we use this

Superseded: As of 2026-08-28, codehooks.io reads: 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. We are not publishing our stored codehooks.io terms beside it — our own pricing change record, discovered 2026-08-28, names them as the previous ones. Read what we recorded ↓ Note — discovered 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

8base is a full-stack low-code development platform built for JavaScript developers built on top of MySQL and GraphQL and serverless backend-as-a-service. It allows you to start building web applications quickly using a UI app builder and scale quickly, The Free tier includes rows: 2,500, Storage: 500, Serverless computing: 1Gb/h, and client app users: 5.

Labelled backend_platform. We read that on 2026-08-31 from https://www.8base.com/product, where it says: “Serverless graphql backend-as-a-service”. How we use this

Open-source backend in a single Go binary — SQLite database, real-time subscriptions, built-in auth (email, OAuth2), file storage (S3-compatible), REST API. Completely free and self-hosted, no vendor lock-in. Single executable, no dependencies

Labelled backend_platform. We read that on 2026-08-31 from https://pocketbase.io/, where it says: “Open Source backend in 1 file with realtime database, authentication, file storage and admin dashboard”. How we use this

Open-source BaaS — 75K MAU, 2 GB storage, 750K function executions/month, 5 GB bandwidth, 1 database, 1 bucket and 2 functions per project. Limit of 2 projects. Projects pause after 1 week of inactivity Note — discovered 2026-09-05: The free tier now has a limit of 2 projects, and the documentation details many more limits than were originally stated (e.g., API bandwidth, executions, storage, databases, buckets, functions, concurrent connections, messages, etc.). Source ↗

Labelled backend_platform. We read that on 2026-08-31 from https://appwrite.io/docs, where it says: “Ship faster with Appwrite. Quick starts and deep guides for web and mobile: Authentication, Databases, Storage, Functions, Messaging, and hosting.”. How we use this

Superseded: As of 2026-09-03, supabase.com/pricing reads: The free tier includes unlimited API requests, 50,000 monthly active users, 500 MB database size, 5 GB egress, 1 GB file storage. Free projects are paused after 1 week of inactivity. Paid plans include $10/mo in compute credits. We are not publishing our stored Supabase terms beside it — our own pricing change record, discovered 2026-09-03, names them as the previous ones. Read what we recorded ↓ Note — discovered 2026-09-03: The free tier now has a 1 week inactivity pause, and compute is now a separate cost with a $10/month credit on paid plans. The free tier also has a spend cap. Source ↗

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

Serverless Postgres with branching — free tier includes 100 CU-hours/month per project, 0.5 GB storage per project, up to 100 projects, 10 branches per project, Neon Auth (60K MAU), auto-scaling up to 2 CU, scale-to-zero

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

Open-source Firebase alternative with Postgres + Hasura GraphQL — 1 GB database, 1 GB storage, 5 GB bandwidth free Note — discovered 2026-09-07: The free tier now pauses projects after 1 week of inactivity. Source ↗

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

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

Multi-model cloud database — 1 GB storage, 0.25 vCPU, 512 MB memory free. Supports SQL-like queries, graph relations, document storage, real-time subscriptions. Includes team collaboration and RBAC Note — 2026-04-12: Free tier memory reduced from 1 GB to 512 MB Source ↗

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

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 Best for unlimited usage needs.

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

Superseded: As of 2026-09-03, supabase.com/pricing reads: The free tier includes unlimited API requests, 50,000 monthly active users, 500 MB database size, 5 GB egress, 1 GB file storage. Free projects are paused after 1 week of inactivity. Paid plans include $10/mo in compute credits. We are not publishing our stored Supabase terms beside it — our own pricing change record, discovered 2026-09-03, names them as the previous ones. Read what we recorded ↓ Note — discovered 2026-09-03: The free tier now has a 1 week inactivity pause, and compute is now a separate cost with a $10/month credit on paid plans. The free tier also has a spend cap. Source ↗

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

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) Note — discovered 2026-08-28: The free tier now has specific limits: 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. The cloud offering is now structured into 'Free', 'Flex', and 'Premium' tiers. Source ↗

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

Serverless Redis — 500K commands/month (256MB data). Vector: 10K vectors free. QStash: 1,000 messages/day free

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

Serverless vector database by Upstash — 10K vectors, 1536 dimensions, 150K query units/day free. REST API, no connection management

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 AI-native embedding database — self-hosted: fully free with no limits. Chroma Cloud: free tier with 1M embeddings, 1 collection, 10K queries/day. Python and JavaScript SDKs Best for unlimited usage needs.

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

Time-series database — free tier: 5 MB writes per 5 minutes, up to 10,000 data series, 30-day data retention. Auto-provisioned for new accounts. Ideal for IoT and monitoring workloads

Labelled timeseries. We read that on 2026-08-31 from https://www.influxdata.com/influxdb-pricing/, where it says: “The time series database built to scale with you”. How we use this

Multi-model cloud database — 1 GB storage, 0.25 vCPU, 512 MB memory free. Supports SQL-like queries, graph relations, document storage, real-time subscriptions. Includes team collaboration and RBAC Note — 2026-04-12: Free tier memory reduced from 1 GB to 512 MB Source ↗

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

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

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.

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

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

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

deploy a forever free tier fully managed database cluster with 1 node and 8GB storage, built for developers to create the next generation of applications across IoT to AI Best for open source projects.

Labelled document. We read that on 2026-08-31 from https://docs.couchbase.com/cloud/get-started/intro.html, where it says: “Capella is the easiest way to use our Couchbase NoSQL database.”. 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

Serverless Redis — 500K commands/month (256MB data). Vector: 10K vectors free. QStash: 1,000 messages/day free

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

Key-value store at the edge — 100K reads/day, 1K writes/day, 1 GB storage. Eventually consistent with global replication

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

Cloud Data Platform with free tiers across products: 10K records/month for data integration, 1 GB backup storage, 5 queries/day for Query product. Multiple cloud connectors included. Best for open source projects.

Azure Databricks Lakeflow Connect — managed data ingestion. Free tier: 100 DBUs/day per workspace (~100M records/day). Supports 40+ data sources including SQL Server, PostgreSQL, MySQL, Salesforce, Sharepoint, Google Sheets. Serverless compute included

Flexible, Spreadsheet-like Database built by the Seafile team. Unlimited tables, 10,000 rows, 1-month versioning, up to 25 team members. Best for unlimited usage needs.

One tool that combines spreadsheets' flexibility, databases' power, and built-in integrations with your favorite business apps. The free plan includes 5 editors plus 50 read-only guests, 20 stacks, and a 2GB attachment per stack.

Connection pooling and caching for any database — 100,000 operations/month, 10 connection pool limit, auto-scaling. Also available: Prisma Postgres free tier with 500 MB storage and up to 5 databases

Official AWS DynamoDB emulator for local development and testing. Full DynamoDB API compatibility. Runs as downloadable JAR or Docker container. No AWS account needed, no network latency, no usage charges. Supports streams, transactions, TTL, and all query patterns

Graph-relational database (formerly EdgeDB) — free cloud tier: 1/4 compute unit (0.5 GiB RAM), 1 GB storage. Also fully open-source for self-hosting. No credit card required

Instant GraphQL API engine over any database — Hasura DDN Free plan: unlimited API requests and unlimited concurrent users, unlimited models at any scale. 1 supergraph developer, 15-minute observability retention. Auto-generates GraphQL APIs from Postgres, SQL Server, BigQuery via database/code/API connectors Best for unlimited usage needs.