Chroma
Open-source vector database (Apache 2.0) with Rust-core engine delivering 4x faster queries, serverless cloud with full-text search, and database forking.
open-source-or-cloud
Open ToolNotion
Knowledge workspace with Notion AI Agent 3.0 for autonomous multi-page work, MCP integration for external tool connectivity, and rich API access.
freemium
Open ToolOpenAI
GPT-5.2 and o-series reasoning models with the Responses API, AgentKit, and built-in tools for web search, code execution, and computer use.
usage-based
Open ToolPinecone
Serverless vector database with integrated inference (embed + store + query in one call), Pinecone Assistant for managed RAG, and dedicated read nodes.
usage-based
Open ToolWeaviate
Open-source vector engine with built-in Weaviate Agents (Query, Transformation, Personalization), Hybrid Search 2.0, and multi-tenant architecture.
open-source-or-cloud
Open Tool