L
LangChain
Open Source
Developer Platform
Framework and platform for building LLM apps, agents, retrieval workflows, tracing, and evaluation.
Supported Platforms
Notes
- Traffic-aware seed rank #100. Based on public 2026 traffic-ranking references and editorial normalization; verify with Similarweb or first-party data before treating as audited.
Latest Updates
How Factory used LangSmith to automate their feedback loop and improve iteration speed by 2x
Jun 16, 2026
Introducing Open SWE: An Open-Source Asynchronous Coding Agent
Jun 16, 2026
Monte Carlo: Building Data + AI Observability Agents with LangGraph and LangSmith
Jun 16, 2026
Sharing LangSmith Benchmarks
Jun 16, 2026
LangSmith: Redesigned product homepage and Resource Tags for better organization
Jun 16, 2026