Best Free Vector Databases

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. Best for unlimited usage needs.

• 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.)

Listed in Databases, and on this page because we labelled it 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

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

Listed in Databases, and on this page because we labelled it 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

Vector database. The Starter plan is free: up to 2 GB storage, 2M write units and 1M read units a month, 1 GB of egress a month (reads that return data stop at the cap until the next billing period), 5 indexes, 1 project and 2 users, on AWS us-east-1 only. Assistant includes 1 GB storage and 500k input, 300k output and 500k context tokens a month. Three embedding models include 5M tokens a month each; bge-reranker-v2-m3 includes 500 requests a month. Builder is $20/month flat.

Listed in AI / ML, and on this page because we labelled it vector_store. We read that on 2026-09-01 from https://www.pinecone.io/, where it says: “Pinecone is a fully managed vector database built for AI. Writes are instantly searchable, indexing is automatic, and queries stay fast at any scale.”. 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.)

Listed in Databases, and on this page because we labelled it 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

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. Note — discovered 2026-04-12: Free tier memory reduced from 1 GB to 512 MB Source ↗

Listed in Databases, and on this page because we labelled it 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. When we last read the page we cite for this offer, on 2026-09-22, we refused the change we considered recording because it named no figure that had moved, and refusing a change is not a confirmation of the terms above, so we cannot confirm these terms today.

Listed in Databases, and on this page because we labelled it 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

Open-source AI-native embedding database — Starter plan per month + $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.)

Listed in Databases, and on this page because we labelled it 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 (256MB 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.)
• Entering a credit card upgrades a Redis database to pay-as-you-go. Paid databases are charged by their plan and do not get free 256MB data or 500K commands. (From upstash.com/pricing, read 2026-10-06.)
• A Redis database created with no account by a POST request to upstash.com/start-redis is deleted after 3 days unless it is claimed into an account from the console link in the response. (From upstash.com/pricing, read 2026-10-06.)

Listed in Databases, and on this page because we labelled it 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

Vector database. The Qdrant Cloud Free Tier is a single-node cluster with 0.5 vCPU, 1 GB RAM and 4 GB disk, for testing and prototypes, with no credit card required; Qdrant says it serves about 1M vectors of 768 dimensions. It includes free Cloud Inference with selected models. An unused free cluster is suspended after 1 week and deleted after 4 weeks of inactivity if not reactivated. Paid clusters are billed on CPU, memory and disk usage.

• An unused Free Tier cluster is suspended after 1 week and deleted after 4 weeks of inactivity unless you reactivate it. (From qdrant.tech/documentation/cloud/create-cluster, read 2026-10-07.)

Listed in AI / ML, and on this page because we labelled it vector_store. We read that on 2026-09-01 from https://qdrant.tech/pricing/, where it says: “Scale to production with fully managed vector search”. How we use this