compare
Langfuse vs LangWatch
The same facts for both, read from GitHub every night, and the relation a person reviewed.
| Fact | Langfuse | LangWatch |
|---|---|---|
| Language | TypeScript | TypeScript |
| Licence | Other | Apache-2.0 |
| Stars | 35k | 4.9k |
| Latest | v4.53.0 | langwatch-3.20.1 |
| Last push | 2026-10-06 | 2026-10-06 |
| Release cadence | about 1 day between releases | about 1 day between releases |
| Active contributors | 33+ commit authors on the default branch in the last 90 days | 8+ commit authors on the default branch in the last 90 days |
| Flags | none | none |
How they relate
Both replace LangSmith. Alternatives to LangSmith →
Full replacementLangfuseTracing, prompt management, datasets and evaluations, with OpenTelemetry ingestion.
Full replacementLangWatchTracing, evaluations and agent simulations, with OpenTelemetry ingestion.
Langfuse
- v4.53.02026-10-06feat(ai-gateway): expose resolution context in response headers, spans and logs
- v4.52.02026-10-06feat(trace-batch): bound batches by estimated weight and exclude oversized traces
- v4.51.02026-10-05feat(mcp): support decision-model evaluators
- v4.50.02026-10-02feat(web): show error id in tRPC error toast and include it in issue reports
- v4.49.02026-10-01feat(web): add org-level ingestion overview tRPC route
LangWatch
- langwatch-3.20.12026-10-02Helm chart for LangWatch application
- v3.20.12026-10-02@langwatch/server@3.20.1 — aigateway monobinaries
- langwatch@v3.20.12026-10-02langwatch: v3.20.1
- langwatch-3.20.02026-10-02Helm chart for LangWatch application
- v3.20.02026-10-02@langwatch/server@3.20.0 — aigateway monobinaries
Langfuse
unsigned The latest release, v4.53.0, carries no signature GitHub could verify.
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LangWatch
unsigned The latest release, langwatch-3.20.1, carries no signature GitHub could verify.
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