An independent, evidence-based trust comparison of Haystack and PydanticAI, two Agent Frameworks projects in the HVTracker registry. Scores come from public, checkable signals — supply-chain provenance, OSSF Scorecard, maintenance, and adoption — not popularity.
| Signal | Haystackdeepset-ai/haystack | PydanticAIpydantic/pydantic-ai |
|---|---|---|
| HVTrust score | 100.0 | 99.8 |
| Evidence grade | A | A |
| Overall rank | #5 | #9 |
| Rank in Agent Frameworks | #2 | #3 |
| GitHub stars | 25.8k | 18.2k |
| Last updated | 1d ago | today |
| Build provenance | Yes | Yes |
| OSSF Scorecard | 9.5 / 10 | 7.1 / 10 |
| License | Apache-2.0 | MIT |
| Downloads | 244k/wk | 8.0M/wk |
| Trust dimensions (points earned) | ||
| Safety / integrity / 25 | 24.4 | 16.4 |
| Identity & provenance / 20 | 18.0 | 18.0 |
| Transparency / 17 | 16.6 | 14.5 |
| Maintenance / 20 | 19.9 | 20.0 |
| Adoption / 20 | 17.8 | 19.4 |
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 v4.0 →