Best Open-Source UI & App Builders: OpenUI vs Neo
A data-backed comparison of the top two ui & app builders on HVTracker, built from public trust signals rather than stars alone.
Short answer: OpenUI currently leads Neo on HVTracker's evidence-weighted trust score: 88.8 vs 87.8/100. This is not a popularity ranking; it combines supply-chain safety, identity/provenance, transparency, maintenance, and adoption signals.
OpenUI
The Open Standard for Generative UI
Neo
Neo.mjs is a self-evolving software organism: a professional end-to-end AI engineering team whose cross-model swarm inhabits live apps via Neural Link, Active Hybrid GraphRAG, DreamService, and self-healing loops.
OpenUI vs Neo: trust signal breakdown
Both projects are tracked in the UI & App Builders category, but they do not expose the same evidence. The table below compares the public signals that feed HVTrust.
| Signal | OpenUI | Neo |
|---|---|---|
| HVTrust score | 88.8 | 87.8 |
| Safety / Integrity | 19.0/25 | 18.6/25 |
| Identity / Provenance | 18.0/18 | 18.0/18 |
| Transparency | 12.9/17 | 12.8/17 |
| Maintenance | 20.0/20 | 20.0/20 |
| Adoption | 16.1/20 | 13.6/20 |
| OSSF Scorecard | 5.2 | 5.0 |
| Signed commits | 100% | 98% |
| Package provenance | Verified | Verified |
Which one should you evaluate first?
If your priority is the most verifiable trust profile today, start with OpenUI. It has the stronger current HVTrust score and ranks higher in UI & App Builders. If your use case depends on a specific runtime, language, license, or integration model, use the individual profiles rather than the headline score alone.
For production use, the practical checklist is: inspect the security policy, confirm package provenance or release signing where available, review recent maintenance cadence, and compare the exact trust breakdown. HVTracker is meant to reduce the first-pass research burden, not replace your own risk review.