Compare
LangWatch vs LangSmith vs LangFuse
How they differ across LLM observability, evaluations, guardrails, and production readiness, feature by feature.
| Feature | LangWatch | LangSmith | LangFuse |
|---|---|---|---|
| Messages | |||
| Threads | |||
| Annotations | |||
| Datasets | |||
| LLM metrics | |||
| User feedback | |||
| Run locally | Enterprise add-on | ||
| User & product analytics | 3rd party only | user metrics only | |
| Custom dashboards | |||
| Topic clustering | — | ||
| Evaluations | |||
| Guardrails | — | — | |
| RAG evaluations & context tracking | RAGAS templates | ||
| Prompt playground | |||
| Included LLM models | bring your own keys | bring your own keys | |
| Automatic PII redaction | manual SDK masking | manual SDK masking | |
| AI-powered trace Ask (find errors & anomalies) | — | ||
| Flame, span, topology & agent graph views | span & graph views | span & graph views | |
| Saved trace views (Lenses) | saved filters | saved table views | |
| Red teaming & safety testing | — | — | |
| AI governance & gateway | — | — | |
| Alerts on eval-score drops | |||
| Batch evaluations | |||
| Export all your messages | |||
| Triggers and alerts | |||
| User events | — | — | |
| User satisfaction sentiment | — | — | |
| Embed dashboards in your app | — | — | |
| Orgs, projects & role-based access | RBAC on Enterprise only | ||
| External access role for customers | — | — | |
| OpenTelemetry native | OTLP ingest, not native | OTLP ingest, not native | |
| Agent simulations | DIY via openevals | DIY via cookbooks | |
| Annotations UI for collaboration |
LangSmith and Langfuse capabilities were checked against docs.langchain.com and langfuse.com in July 2026. Spot something outdated? Tell us and we will fix it.
Ship agents with confidence, not crossed fingers.
Get up and running with LangWatch in as little as five minutes.