Vectorize

Vectorize is Cloudflare’s vector database: create an index, insert embeddings, query by similarity, all through a Workers binding. For adding semantic search or basic RAG to an app already on Workers, the integration convenience is real and the pricing is friendly.

The constraints arrive quickly at scale: index size caps, metadata filtering that’s serviceable but limited, and no hybrid search story to speak of. Latency is acceptable rather than impressive. It pairs naturally with Workers AI for embeddings, which unfortunately couples it to that product’s reliability.

It’s the “good enough to start” tier — genuinely useful for prototypes and modest production search features, but teams with serious retrieval workloads will end up on a dedicated vector store. Score it as convenient middleware, not a destination database.