LangChain vs OpenRouter

FeatureLangChainOpenRouter
CategoryAI Agent FrameworksAI Development
PricingFree + LangSmith paidPay-per-use (varies by model)
GitHub Stars98,000—
PlatformsmacOS, Linux, WindowsWeb
Features
  • ✓ Chain composition
  • ✓ RAG pipelines
  • ✓ Agent toolkits
  • ✓ Memory systems
  • ✓ Streaming
  • ✓ Multi-model
  • ✓ LangGraph
  • ✓ 200+ models
  • ✓ Unified API
  • ✓ Auto-fallback
  • ✓ Rate limiting
  • ✓ Usage tracking
  • ✓ OpenAI-compatible
Tags
open-sourceframeworkpythonjavascriptragchains
apimulti-modelgatewayroutingpay-per-use