
AI Agent & LLM Observability Platform

Building AI to Simulate the World
LangSmith offers an API for integration into your workflows.
LangSmith: AI Agent & LLM Observability Platform. Runway: Building AI to Simulate the World. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. LangSmith is freemium and Runway is freemium.
The best choice between LangSmith and Runway depends on your specific needs. Compare their features, pricing, and target audience on this page to find the tool that best fits your use case.
Both are primarily designed for individuals. The choice depends on which specific features you need.
LangSmith offers: SDKs for Python, TypeScript, Go, and Java, Message threading for multi-turn chat interactions, Cost tracking, Online LLM-as-judge and code evals. Runway offers: Building foundational General World Models, Simulating possible worlds and experiences, AI for understanding the world, AI for perceiving the world.
Based on our data, LangSmith currently enjoys greater popularity. However, popularity isn't the only factor — compare features to find the right tool for your needs.
Neither tool currently offers a free trial.
LangSmith offers 20 integrations (amazon-bedrock, anthropic, google-adk, openai-sdk, vercel-ai-sdk...) compared to 0 for Runway.
LangSmith is available on Web, Api, Cli. Runway is available on Web.