An independent, evidence-weighted trust comparison of two memory & knowledge — ranked on verifiable signals, not popularity.
| Signal | Mem0 | Vespa |
|---|---|---|
| HVTrust score | 87.5 | 86.2 |
| Evidence grade | A | A |
| Registry state | Listed | Listed |
| Safety / Integrity (25) | 18.8 | 17.3 |
| Identity / Provenance (18) | 18.0 | 18.0 |
| Transparency (17) | 12.8 | 13.3 |
| Maintenance (20) | 18.6 | 20.0 |
| Adoption (20) | 19.3 | 17.6 |
| GitHub stars | 58.1k | 7.0k |
| Weekly downloads | 796,464 | 2,040,709 |
| Last push | 2026-06-08 | 2026-06-11 |
| Language | Python | Java |
| OSSF Scorecard | 5.0 | 5.7 |
| Review flags | — | — |
| Recent change | 2026-05-29: HVTrust up 10.0pts (75.9 → 85.9) | 2026-06-01: Activity score up 25pts (61 → 86) |