AI Town vs Obsidian Second Brain
An independent, evidence-based trust comparison of AI Town and Obsidian Second Brain, two Needs review projects in the HVTracker registry. Scores come from public, checkable signals — supply-chain provenance, OSSF Scorecard, maintenance, and adoption — not popularity.
Obsidian Second Brain leads on trust — 61.2/100 (Grade C) vs 43.5/100 (Grade D), a 17.7-point gap. Full breakdown below.
| Signal | AI Towna16z-infra/ai-town | Obsidian Second Braineugeniughelbur/obsidian-second-brain |
|---|---|---|
| HVTrust score | 43.5 | 61.2 |
| Evidence grade | D | C |
| Coverage grade | C | C |
| Overall rank | #553 | #293 |
| Rank in Needs review | #8 | #3 |
| GitHub stars | 10.3k | 4.0k |
| Last updated | 64d ago | 7d ago |
| Build provenance | No | No |
| OSSF Scorecard | 3.6 / 10 | 6.1 / 10 |
| License | MIT | MIT |
| Downloads | — | — |
| Trust dimensions (points earned) | ||
| Safety / integrity / 25 | 5.8 | 10.3 |
| Identity & provenance / 18 | 10.8 | 10.8 |
| Transparency / 17 | 11.6 | 13.7 |
| Maintenance / 20 | 7.7 | 19.5 |
| Adoption / 20 | 9.6 | 8.7 |
| Runtime capability surface (full matrix) | ||
| MCP server | — | Implemented |
| External providers | 3 — OpenAI, Replicate, Together AI | 6 — Anthropic, Google Gemini, OpenAI, … |
| Requires API keys | Yes | Yes |
| Plugin surface | — | plugins |
| Provenance drift | — | — |
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 →