Promptfoo vs Weights & Biases Weave
An independent, evidence-based trust comparison of Promptfoo and Weights & Biases Weave, two Observability & Evaluation projects in the HVTracker registry. Scores come from public, checkable signals — supply-chain provenance, OSSF Scorecard, maintenance, and adoption — not popularity.
Promptfoo leads on trust — 88.8/100 (Grade A) vs 86.5/100 (Grade A), a 2.3-point gap. Full breakdown below.
| Signal | Promptfoopromptfoo/promptfoo | Weights & Biases Weavewandb/weave |
|---|---|---|
| HVTrust score | 88.8 | 86.5 |
| Evidence grade | A | A |
| Coverage grade | A | A |
| Overall rank | #19 | #35 |
| Rank in Observability & Evaluation | #2 | #3 |
| GitHub stars | 24.3k | 1.1k |
| Last updated | today | today |
| Build provenance | Yes | Yes |
| OSSF Scorecard | 7.5 / 10 | 6.4 / 10 |
| License | MIT | Apache-2.0 |
| Downloads | 384k/wk | 612k/wk |
| Trust dimensions (points earned) | ||
| Safety / integrity / 25 | 16.9 | 20.4 |
| Identity & provenance / 18 | 18.0 | 18.0 |
| Transparency / 17 | 14.9 | 13.9 |
| Maintenance / 20 | 20.0 | 19.9 |
| Adoption / 20 | 18.0 | 15.0 |
| Runtime capability surface (full matrix) | ||
| MCP server | Implemented | Implemented |
| External providers | 2 — Anthropic, OpenAI | 9 — Amazon Bedrock, Anthropic, Cohere, … |
| Requires API keys | Yes | No |
| Plugin surface | plugins | — |
| Provenance drift | Match | Partial |
Open in the live compare tool →
Promptfoo profile
Weights & Biases Weave 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 v4.3 →