Best Open-Source UI & App Builders: Streamlit vs Gradio
A data-backed comparison of the top two ui & app builders on HVTracker, built from public trust signals rather than stars alone.
Short answer: Streamlit currently leads Gradio on HVTracker's evidence-weighted trust score: 94.5 vs 89.1/100. This is not a popularity ranking; it combines supply-chain safety, identity/provenance, transparency, maintenance, and adoption signals.
Streamlit
Streamlit — A faster way to build and share data apps.
Gradio
Build and share delightful machine learning apps, all in Python. 🌟 Star to support our work!
Streamlit vs Gradio: 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 | Streamlit | Gradio |
|---|---|---|
| HVTrust score | 94.5 | 89.1 |
| Safety / Integrity | 21.7/30 | 19.3/30 |
| Identity / Provenance | 18.0/20 | 18.0/20 |
| Transparency | 14.8/20 | 13.3/20 |
| Maintenance | 20.0/20 | 18.7/20 |
| Adoption | 20.0/10 | 19.8/10 |
| OSSF Scorecard | 7.4 | 5.7 |
| Signed commits | 100% | 93% |
| Package provenance | Verified | Verified |
Which one should you evaluate first?
If your priority is the most verifiable trust profile today, start with Streamlit. 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.