| What it does | Extract a design system from any website for AI
| Free tree testing tool for testing information architecture
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| Stage | Not given
| Established
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| Founded | Not given
| 2021
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| Based in | US
| Not given
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| Pricing model | Freemium
| Free
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| Pricing | Free: 2 design packs a day without account, 5 per day with free account. Pro: $9 per month (or $90 per year) for 50 packs per month, any page of a site, private packs, MCP server and REST API.
| Free for unlimited tree testing and card sorting studies, unlimited participants and responses, and full analysis. Participant recruitment through UXbeam's panel starts at $1 per participant-minute.
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| Key features | - DESIGN.md in Google's format describing colors, type, spacing, radii, shadows and components
- BEHAVIOR.md covering hover, focus, tooltips, menus, motion, scrolling, tables, forms and dark mode
- Screenshots at four widths: 1440, 1024, 768 and 390 pixels
- W3C design tokens (DTCG) format for Style Dictionary and Figma plugins
- CSS custom properties with all design values
- Tailwind v4 theme block
- SKILL.md for Claude Code and Cursor
- MCP server integration for AI agents to fetch packs automatically
- REST API with keys for automated access
- Private packs accessible only to the user
| - Unlimited tree-testing studies and participants
- Leading-task detection to catch biased wording
- Path replay visualization of participant navigation
- Task outcome breakdown into direct, indirect, and elsewhere
- Full-scenario completion tracking across multiple tasks
- Mobile-compatible participant experience
- Integrated card sorting with tree testing workflow
- Multiple valid destinations per task
- Iterative testing with versioned results
- Complete CSV export of participant-level results
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| What makes it different | - Measured from live pages, not guessed from screenshots
- Captures behavioral details like interactions and state changes, not just visual design
- Free tier requires no account or card to try
- AI agents can use Stylepack directly with Pro via MCP server
| - No credit card required and truly unlimited at no cost
- Built-in methodological safeguards prevent common research mistakes
- One-screen setup lets researchers create tests in minutes
- Mental Model Detection identifies competing ways different user groups organize content
- AI-assisted participant recruitment with audience targeting
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | Not checked yet ● no change since last check | 35 ● no change since last check |
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| Trust Flow (Majestic) | 0 | 0 |
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| Citation Flow (Majestic) | 0 | 16 |
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| Referring domains (Majestic) | 0 | 2 |
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Stylepack