An independent, evidence-weighted trust comparison of two agent frameworks — ranked on verifiable signals, not popularity.
| Signal | LangGraph | Haystack |
|---|---|---|
| HVTrust score | 92.9 | 92.6 |
| Evidence grade | A | A |
| Registry state | Listed | Listed |
| Safety / Integrity (25) | 21.0 | 22.2 |
| Identity / Provenance (18) | 18.0 | 18.0 |
| Transparency (17) | 14.3 | 15.1 |
| Maintenance (20) | 19.6 | 19.6 |
| Adoption (20) | 20.0 | 17.7 |
| GitHub stars | 34.0k | 25.5k |
| Weekly downloads | 16,632,287 | 204,140 |
| Last push | 2026-06-05 | 2026-06-05 |
| Language | Python | Python |
| OSSF Scorecard | 6.8 | 7.8 |
| Review flags | — | — |
| Recent change | 2026-06-01: HVTrust up 3.8pts (89.5 → 93.3) | 2026-06-04: HVTrust up 4.1pts (90.2 → 94.3) |