LangChain
Agent framework (v1.1) with create_agent abstraction, LangGraph stateful orchestration, middleware for retries and moderation, and model profiles.
open-source
Open Tooln8n
Visual workflow engine with AI Agent nodes, MCP tool swapping, RAG capabilities, and multi-type memory. Self-host free or use managed cloud plans.
freemium
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 Tool