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Weights & Biases Weave vs Langfuse

An independent, evidence-weighted trust comparison of two observability & evaluation — ranked on verifiable signals, not popularity.

Weights & Biases Weave ranks higher with an HVTrust score of 83.6 vs 77.4/100 (Grade A vs B). HVTrust reflects supply-chain safety, transparency, maintenance, and adoption — weighted by how much verifiable evidence exists.
SignalWeights & Biases WeaveLangfuse
HVTrust score83.677.4
Evidence gradeAB
Registry stateListedListed
Safety / Integrity (25)18.413.0
Identity / Provenance (18)18.010.8
Transparency (17)12.814.0
Maintenance (20)20.020.0
Adoption (20)14.419.6
GitHub stars1.1k28.5k
Weekly downloads218,4165,177,025
Last push2026-06-042026-06-04
LanguagePythonTypeScript
OSSF Scorecard5.06.5
Review flags——
Recent change2026-05-29: Rank dropped 14 spots (#5 → #19)2026-06-02: Rank rose 96 spots (#126 → #30)
Full Weights & Biases Weave report → Full Langfuse report → All Observability & Evaluation →