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
Evaluating code review agents with ReviewBench
Jul 31, 2026
LangSmith LLM Gateway: runtime governance built into the agent lifecycle
Jul 31, 2026
Introducing Align Evals: Streamlining LLM Application Evaluation
Jul 30, 2026
Deep Agents v0.7
Jul 29, 2026
How Similarweb Evaluates Agent Reports with LangSmith
Jul 29, 2026