NeMo Guardrails vs REA
An independent, evidence-based trust comparison of NeMo Guardrails and REA, two Security & Guardrails projects in the HVTracker registry. Scores come from public, checkable signals — supply-chain provenance, OSSF Scorecard, maintenance, and adoption — not popularity.
REA leads on trust — 78.9/100 (Grade B) vs 72.4/100 (Grade B), a 6.5-point gap. Note: REA's evidence coverage is thinner (coverage B vs A) — its score rests on fewer independent signal types. Full breakdown below.
| Signal | NeMo GuardrailsNVIDIA/NeMo-Guardrails | REAmorluto/rea |
|---|---|---|
| HVTrust score | 72.4 | 78.9 |
| Evidence grade | B | B |
| Coverage grade | A | B |
| Overall rank | #255 | #149 |
| Rank in Security & Guardrails | #5 | #4 |
| GitHub stars | 7.1k | 398 |
| Last updated | 4d ago | today |
| Build provenance | No | Yes |
| OSSF Scorecard | 6.6 / 10 | 5.1 / 10 |
| License | NOASSERTION | MIT |
| Downloads | 77k/wk | 528/wk |
| Trust dimensions (points earned) | ||
| Safety / integrity / 25 | 13.2 | 16.1 |
| Identity & provenance / 18 | 10.8 | 18.0 |
| Transparency / 17 | 14.1 | 12.8 |
| Maintenance / 20 | 18.5 | 16.4 |
| Adoption / 20 | 15.8 | 9.9 |
| Runtime capability surface (full matrix) | ||
| MCP server | — | Implemented |
| External providers | 1 — OpenAI | — |
| Requires API keys | No | No |
| Plugin surface | — | — |
| Provenance drift | Unknown | Match |
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 →