Langfuse vs LangWatch
An independent, evidence-based trust comparison of Langfuse and LangWatch, two Observability & Evaluation projects in the HVTracker registry. Scores come from public, checkable signals — supply-chain provenance, OSSF Scorecard, maintenance, and adoption — not popularity.
LangWatch leads on trust — 72.7/100 (Grade B) vs 70.7/100 (Grade B), a 2.0-point gap. Full breakdown below.
| Signal | Langfuselangfuse/langfuse | LangWatchlangwatch/langwatch |
|---|---|---|
| HVTrust score | 70.7 | 72.7 |
| Evidence grade | B | B |
| Coverage grade | A | A |
| Overall rank | #101 | #91 |
| Rank in Observability & Evaluation | #8 | #6 |
| GitHub stars | 32.5k | 3.5k |
| Last updated | today | today |
| Build provenance | No | Yes |
| OSSF Scorecard | 6.6 / 10 | — |
| License | NOASSERTION | Apache-2.0 |
| Downloads | 6.9M/wk | 88k/wk |
| Trust dimensions (points earned) | ||
| Safety / integrity / 25 | 12.8 | 11.9 |
| Identity & provenance / 18 | 10.8 | 18.0 |
| Transparency / 17 | 14.1 | 8.5 |
| Maintenance / 20 | 20.0 | 20.0 |
| Adoption / 20 | 20.0 | 15.1 |
| Runtime capability surface (full matrix) | ||
| MCP server | Implemented | Implemented |
| External providers | 6 — Amazon Bedrock, Anthropic, Firecrawl, … | 5 — Amazon Bedrock, Anthropic, OpenAI, … |
| Requires API keys | No | Yes |
| Plugin surface | plugins | extensions |
| Provenance drift | Warning | Partial |
Open in the live compare tool →
Langfuse profile
LangWatch profile
More Observability & Evaluation →
How to read this: HVTrust (0–100) weighs supply-chain signals (provenance, OSSF Scorecard, signed commits, open license) alongside real-world adoption, scaled by an evidence-confidence factor. Grade bands: A ≥ 80, B ≥ 65, C ≥ 50, D < 50. Signals refresh daily. Full methodology v4.2 →