LangGraph.js vs Pi Agent Core

LangGraph.js and Pi Agent Core are both agent frameworks. LangGraph.js is published by LangChain and Pi Agent Core by Earendil. On GitHub, Pi Agent Core has 117,586 stars and LangGraph.js has 3,370. Both were last active in Oct 2026. The table lines up where they differ (publisher, GitHub stars, weekly downloads and category) and has the install commands for both. Everything here comes from the listings' public sources and is refreshed daily. LangGraph.js describes itself as: Open-source agent harness from LangChain for building agents with code, with LangSmith for testing and monitoring. Pi Agent Core: Minimal TypeScript agent harness with an agent runtime, multi-provider LLM API, terminal UI and coding agent CLI that users extend themselves. Licenses: LangGraph.js MIT, Pi Agent Core MIT.