Guardrails AI vs HOL Guard
An independent, evidence-based trust comparison of Guardrails AI and HOL Guard, two Security & Guardrails projects in the HVTracker registry. Scores come from public, checkable signals — supply-chain provenance, OSSF Scorecard, maintenance, and adoption — not popularity.
HOL Guard leads on trust — 88.5/100 (Grade A) vs 83.0/100 (Grade A), a 5.5-point gap. Note: HOL Guard's evidence coverage is thinner (coverage B vs A) — its score rests on fewer independent signal types. Full breakdown below.
| Signal | Guardrails AIguardrails-ai/guardrails | HOL Guardhashgraph-online/hol-guard |
|---|---|---|
| HVTrust score | 83.0 | 88.5 |
| Evidence grade | A | A |
| Coverage grade | A | B |
| Overall rank | #62 | #20 |
| Rank in Security & Guardrails | #3 | #1 |
| GitHub stars | 7.3k | 437 |
| Last updated | 3d ago | 1d ago |
| Build provenance | Yes | Yes |
| OSSF Scorecard | 6.4 / 10 | 7.6 / 10 |
| License | Apache-2.0 | Apache-2.0 |
| Downloads | 41k/wk | 30k/wk |
| Trust dimensions (points earned) | ||
| Safety / integrity / 25 | 20.5 | 21.7 |
| Identity & provenance / 18 | 18.0 | 18.0 |
| Transparency / 17 | 13.9 | 15.0 |
| Maintenance / 20 | 17.2 | 19.9 |
| Adoption / 20 | 15.4 | 12.3 |
| Runtime capability surface (full matrix) | ||
| MCP server | — | Implemented |
| External providers | 3 — Anthropic, Multi-provider (LiteLLM), OpenAI | 3 — Anthropic, Google Gemini, Multi-provider (LiteLLM) |
| Requires API keys | Yes | Yes |
| Plugin surface | — | plugins |
| Provenance drift | Unknown | Match |
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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 →