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Thesys vs Hey Design AI

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Thesys compared with Hey Design AI
DetailThesys logo ThesysHey Design AI logo Hey Design AI
What it doesThe open standard for Generative UI Curated website design prompts that turn visual direction into copy-ready build briefs for AI builders
StageStartup Startup
Founded2024 2026
Based inUS Not given
Pricing modelNot given Freemium
PricingFree ($0/mo) with 3K API calls/month; Build ($49/mo) with 25K API calls/month; Grow ($499/mo) with 500K API calls/month; Scale (Custom). API calls included; LLM tokens billed separately at provider rates. Reports API: 100 pages free per month, then $0.01 per page. Single prompt: $29.90 (permanent access to 1 prompt). Standard annual: $299 (up to 5 prompts daily unlock for 365 days). Premium annual: $999 (up to 20 prompts daily unlock for 365 days, team access, MCP support). 20 fixed prompts available free.
Key features
  • Interactive charts and visualizations
  • Dynamic dashboard generation
  • Real-time UI adaptation
  • Reports and slides generation
  • Multiple LLM support
  • OpenUI Cloud with API key management
  • Style customizations
  • 350 curated website design prompts
  • Visual previews with design briefs and craft notes
  • Tested against WCAG 2.2 and Core Web Vitals standards
  • Works with Lovable, v0, Bolt, Replit, Claude Code, and Cursor
  • Mobile responsive behavior included in prompts
  • Negative constraints to prevent generic AI patterns
  • Keyboard and accessibility guidance
  • Reduced-motion states for motion support
  • MCP retrieval for Premium annual subscribers
  • 365-day annual access with no auto-renewal
What makes it different
  • Open standard for Generative UI instead of proprietary solution
  • No markup on LLM pricing - pay provider rates directly
  • Zero data retention on paid plans
  • Interfaces adapt to context and user intent in real-time
  • Editorial curation rather than scraped prompts
  • Tested design briefs with clear reasoning for each choice
  • Designed for commercial use and client projects
  • Model-agnostic prompts that work across multiple AI builders
  • Clear art direction to prevent designs from becoming generic collages
Community votes00
DR (Domain Rating by Ahrefs)63 no change since last check13 no change since last check
Trust Flow (Majestic)274
Citation Flow (Majestic)4020
Referring domains (Majestic)87661

6 details filled in for both companies.

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