Diagram Design vs Startup Skill
For the Validate phase, Diagram Design leads Startup Skill on adoption - 31.7k vs 889 GitHub stars. Both are marketplaces; pick by fit, not just rank - the full side-by-side is below.
A side-by-side comparison of two marketplace options for the Validate phase - adoption, what each is for, and how to install them.
Ranked by Skillselion · adoption from the skills.sh registry & GitHub.
Diagram Design vs Startup Skill
| Diagram Design | Startup Skill | |
|---|---|---|
| GitHub stars | 31.7k | 889 |
| Installs | 0 | 0 |
| Adoption rank (this phase) | #1 | #5 |
| Built for | Claude Code | Claude Code |
| What it is | diagram-design helps Claude Code produce structured diagrams for validating product concepts, mapping user flows, and prototyping system architecture before implementation begins. | startup-skill (v1.10.0, 513 GitHub stars) is a Claude Code plugin packaging four skills: startup-design, startup-competitors, startup-positioning, and startup-pitch. |
| Install | /plugin marketplace add cathrynlavery/diagram-design | /plugin marketplace add ferdinandobons/startup-skill |
Common questions
Diagram Design vs Startup Skill: which is better for validate?
Diagram Design ranks higher by adoption (31.7k vs 889 GitHub stars), but both are marketplaces for the Validate phase - choose by fit.
How do I install Diagram Design?
Run: /plugin marketplace add cathrynlavery/diagram-design
How do I install Startup Skill?
Run: /plugin marketplace add ferdinandobons/startup-skill
More for the Validate phase
See the full ranked shortlist of best marketplace options for validate, browse every Marketplaces, or see every best-of shortlist.