Postgres teams switch to stay within existing stack. Gain: free, no new infrastructure, 75% less cost claims, competitive performance with pgvectorscale. Trade-off: not purpose-built for vectors, less specialized features.

Teams switch for open-source flexibility and better performance. Gain: MIT license, can self-host, strong API, 1-second faster response time reported. Trade-off: more ops work if self-hosting, smaller managed cloud.

Companies switch for hybrid search and open-source option. Gain: can self-host, strong hybrid search, GraphQL API, built-in vectorizers. Trade-off: more complex, higher learning curve than Pinecone.

Enterprises switch for massive scale and open-source. Gain: battle-tested at billion-vector scale, Apache 2.0 license, on-prem option. Trade-off: complex to operate, more suited for large teams.

Developers switch for local-first development. Gain: embedded mode, simple setup, great for prototyping. Trade-off: less mature for production, smaller ecosystem than Pinecone.