
AI Agent & LLM Observability Platform

Run open-source machine learning models with a cloud API
LangSmith: AI Agent & LLM Observability Platform. Replicate: Run open-source machine learning models with a cloud API. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. LangSmith is freemium and Replicate is freemium.
The best choice between LangSmith and Replicate 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: Cost tracking, Online LLM-as-judge and code evals, Tool and agent trajectory monitoring, Webhook and Pagerduty alerts. Replicate offers: Cloud API for open-source and proprietary models, Vast library of models, Scalable on demand deployment, Billing by run time.
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.