Browser Harness vs Cua
An independent, evidence-based trust comparison of Browser Harness and Cua, two Browser & Computer Use projects in the HVTracker registry. Scores come from public, checkable signals — supply-chain provenance, OSSF Scorecard, maintenance, and adoption — not popularity.
Browser Harness leads on trust — 87.7/100 (Grade A) vs 74.8/100 (Grade B), a 12.9-point gap. Full breakdown below.
| Signal | Browser Harnessbrowser-use/browser-harness | Cuatrycua/cua |
|---|---|---|
| HVTrust score | 87.7 | 74.8 |
| Evidence grade | A | B |
| Coverage grade | B | B |
| Overall rank | #25 | #93 |
| Rank in Browser & Computer Use | #1 | #7 |
| GitHub stars | 16.7k | 21.3k |
| Last updated | 11d ago | today |
| Build provenance | Yes | No |
| OSSF Scorecard | 6.1 / 10 | 5.2 / 10 |
| License | MIT | MIT |
| Downloads | 3.0M/wk | 11k/wk |
| Trust dimensions (points earned) | ||
| Safety / integrity / 25 | 17.1 | 9.8 |
| Identity & provenance / 18 | 18.0 | 10.8 |
| Transparency / 17 | 13.7 | 12.9 |
| Maintenance / 20 | 17.4 | 20.0 |
| Adoption / 20 | 18.8 | 15.8 |
| Runtime capability surface (full matrix) | ||
| MCP server | — | Implemented |
| External providers | 1 — Anthropic | 2 — Anthropic, OpenAI |
| Requires API keys | No | No |
| Plugin surface | plugins | — |
| Provenance drift | Match | 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 →