Guardrails AI vs NeMo Guardrails
An independent, evidence-based trust comparison of Guardrails AI and NeMo Guardrails, two Security & Guardrails projects in the HVTracker registry. Scores come from public, checkable signals — supply-chain provenance, OSSF Scorecard, maintenance, and adoption — not popularity.
Guardrails AI leads on trust — 81.4/100 (Grade A) vs 72.7/100 (Grade B), a 8.7-point gap. Full breakdown below.
| Signal | Guardrails AIguardrails-ai/guardrails | NeMo GuardrailsNVIDIA/NeMo-Guardrails |
|---|---|---|
| HVTrust score | 81.4 | 72.7 |
| Evidence grade | A | B |
| Coverage grade | A | A |
| Overall rank | #78 | #174 |
| Rank in Security & Guardrails | #2 | #3 |
| GitHub stars | 7.3k | 7.1k |
| Last updated | today | 2d ago |
| Build provenance | Yes | No |
| OSSF Scorecard | 6.0 / 10 | 6.6 / 10 |
| License | Apache-2.0 | NOASSERTION |
| Downloads | 17k/wk | 79k/wk |
| Trust dimensions (points earned) | ||
| Safety / integrity / 25 | 20.0 | 13.2 |
| Identity & provenance / 18 | 18.0 | 10.8 |
| Transparency / 17 | 13.6 | 14.1 |
| Maintenance / 20 | 16.9 | 18.8 |
| Adoption / 20 | 14.9 | 15.8 |
| Runtime capability surface (full matrix) | ||
| MCP server | — | — |
| External providers | 3 — Anthropic, Multi-provider (LiteLLM), OpenAI | 1 — OpenAI |
| Requires API keys | Yes | No |
| Plugin surface | — | — |
| Provenance drift | Unknown | Unknown |
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Guardrails AI profile
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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 →