Vector databases for AI agents
6 APIs compared on price, free tier, MCP support and real usage. Prices from the vendors' pricing pages, checked Oct 9, 2026.
Free to start
5 of 6
Supabase (pgvector), Qdrant Cloud, Chroma Cloud
Official MCP server
5 of 6
plug straight into Claude Code, Cursor and others
| API | Free | Price | SDK downloads / wk | GitHub stars | MCP |
|---|---|---|---|---|---|
| Supabase (pgvector) Hosted Postgres with the pgvector extension, plus auth, storage and APIs. |
Free: 500 MB database, shared CPU, 2 active... | Free plan · paid from $25/mo | 37M | 111K | MCP |
| Qdrant Cloud Managed clusters of the open-source Qdrant vector search engine. |
Free forever single-node cluster: 0.5 vCPU,... | Free plan | 3.9M | 35K | MCP |
| turbopuffer Serverless vector and full-text search engine built on object storage. |
— | from $16/mo | 2.1M | 174 | |
| Chroma Cloud Serverless hosted version of the open-source Chroma vector, full-text and metadata search database. |
Starter $0/month + $5 in free credits | Free plan · paid from $250/mo | 1.9M | 29.5K | MCP |
| Pinecone Fully managed serverless vector database with dense, sparse and full-text indexes. |
Starter: up to 2 GB storage, 2M write units... | Free plan · paid from $20/mo | 1.8M | 453 | MCP |
| Weaviate Cloud Managed Weaviate, an open-source vector database with hybrid search and built-in embeddings. |
Free forever: 100,000 objects, 1 GB memory,... | Free plan · paid from $45/mo | 1.7M | 16.9K | MCP |
Other categories
Web search APIs Scraping and crawling Browser automation (cloud) Code sandboxes Memory for agents LLM gateways and routers Email sending Voice (speech-to-text Payments for agents Blockchain RPC and node providers DEX swap and liquidity APIs Crypto market and on-chain data 3D model generation Image generation APIs Sound effects and music generation Video generation APIs