What is the difference between Pinecone and Weaviate?

Pinecone is a closed-source managed service optimized for simple vector search at scale, with a minimal API and automatic infrastructure management. Weaviate is open-source, offers both cloud and self-hosted deployments, and bundles modules for vectorization, reranking, generative search, and multi-tenancy directly into the database. Weaviate uses GraphQL alongside REST, supports hybrid search natively, and targets teams that want more built-in AI features, while Pinecone targets teams that want pure vector infrastructure without extra moving parts.