This is exactly what Mem does using Pinecone and OpenAI: https://www.pinecone.io/learn/mem-semantic-search/ https://www.pinecone.io/learn/mem-semantic-search/

This is exactly what Mem does using Pinecone and OpenAI: https://www.pinecone.io/learn/mem-semantic-search/ https://www.pinecone.io/learn/mem-semantic-search/ Almost any self-hosted ANN library will do if you're dealing with <1M vectors, but the indexes at these note-based applications tend to balloon very quickly into the hundreds of millions and billions. Given the popularity of Notion I expect their number of (would-be) vectors to be monstrously big. That's where rolling your own gets painful (or downright not feasible) and where Pinecone shines.[1] [1] https://www.pinecone.io https://www.pinecone.io - Disclosure: I work there.