The best vector db & data infra for AI agents

Fully-managed serverless hosting for the developer-favorite open-source Chroma, with the same API as local Chroma and per-database scoped keys. Best for agent builders.

Serverless vector database that runs on Cloudflare's global edge network, wired directly into Workers and Workers AI for low-latency RAG. Best for agent builders.

Reactive serverless backend-as-a-service with built-in vector search alongside your app data — well suited to real-time AI apps and agents. Best for agent builders.

Fully-managed serverless vector search for multimodal AI, built on the open-source Lance columnar format — pay only for storage you use. Best for agent builders.

Vector search built into MongoDB Atlas so embeddings live next to your operational documents — free on the M0 tier, provisionable via the Atlas Admin API. Best for agent builders.

Serverless Postgres with pgvector plus a Claimable-Postgres API that spins up a live database with zero human involvement — purpose-built as a backend for apps and AI agents. Best for agent builders.

The managed serverless vector database most RAG teams reach for — autoscales to zero, with a control-plane Admin API for programmatic project and key provisioning. Best for agent builders.

Managed cloud for the popular open-source Qdrant vector engine, with a genuinely free-forever 1GB cluster (no credit card) and a cloud management API. Best for agent builders.

Managed Redis with a built-in query engine for vector, full-text, geospatial and hybrid search — real-time speed for agent memory and RAG. Best for agent builders.

Open-source Postgres backend where pgvector is included free on every plan, with a Management API and OAuth2 for programmatically creating and managing projects. Best for agent builders.

Managed Postgres tuned for scale with pgvector + pgvectorscale and hybrid vector/BM25 search — a Postgres-native RAG backend, no per-vector pricing. Best for agent builders.

Object-storage-native search engine offering vector + full-text search at roughly 10x lower cost than in-memory vector DBs, now with self-serve signup. Best for agent builders.

Serverless, HTTP-first Vector and Redis with pay-per-request pricing and a full Developer API + MCP server for provisioning databases from code or agents. Best for agent builders.

Managed cloud for Vespa, the big-data search-and-inference platform combining vector search, ML-ranked retrieval and real-time inference at massive scale. Best for agent builders.

Managed cloud for the open-source Weaviate vector database, with built-in hybrid search and vectorizer modules and a free 14-day sandbox to start instantly. Best for agent builders.

The fully-managed cloud from the makers of Milvus — serverless vector search that scales to billions of vectors, with a free tier and startup credits. Best for agent builders.