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Head-to-head · UI Design Tools

Justinmind vs Proto.io

  • Updated Oct 2026
  • Both researched from official sources
  • 9 checks side by side
Higher score Justinmind #8 in UI Design Tools 8.6/10 Free plan · 10-day trial Free planFree trial✓ 7 of 7 features Visit Justinmind
Proto.io #16 in UI Design Tools 7.8/10 Free plan · 15-day trial Free planFree trial✓ 4 of 7 features Visit Proto.io

Justinmind leads on 2 checks, Proto.io on 0, and 7 are even. Who comes out ahead on the 9 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreJustinmind · 8.6/10
  • Lowest starting priceJustinmind · $19/user/mo
  • Free planboth
  • Free trialboth
  • Most featuresJustinmind · 7 of 7

Justinmind scores higher on our rubric for ui design tools: 8.6 against 7.8 out of 10; our editors rank them #8 and #16.

Justinmind is cheaper to start at $19/user/mo against $29/user/mo. Justinmind offers desktop app; Proto.io doesn't.

Justinmind is the better fit for teams needing logic-rich prototypes. Proto.io is the better fit for teams needing many sharing controls.

  • Justinmind fits best

    Teams needing logic-rich prototypes

  • Proto.io fits best

    Teams needing many sharing controls

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Justinmind 8.6/10 Visit ↗ Proto.io 7.8/10 Visit ↗
At a glance
Editor score 8.6 7.8
Ranking #8 in UI Design Tools #16 in UI Design Tools
Best for Teams needing logic-rich prototypes Teams needing many sharing controls
Pricing model Free plan + paid Free plan + paid
Starting price $19/user/mo (best) $29/mo
Free plan ✓ ✓
Free trial 10 days 15 days
Free trial length 10 days · no card needed 15 days · no card needed
Deployment Cloud, Self-hosted, Desktop, Mobile Cloud, Mobile
Platforms Web, Windows, macOS, iOS, Android Web, iOS, Android
Support Email, Tickets, Community, Docs Live chat, Tickets, Docs
Compliance GDPR, PCI DSS ISO 27001, GDPR, SSO/SAML
Integrations 6 integrations 9 integrations
Built for Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Justinmind 7/7 · Proto.io 4/7
Real-time collaboration ✓ (best) Not checked yet
Interactive prototyping ✓ ✓
Design systems ✓ ✓
Developer handoff ✓ (best) Not checked yet
Variables or design tokens ✓ ✓
Desktop app ✓ (best) —
Prototype sharing ✓ ✓
Our review
Pros
  • Conditional logic, forms, variables, and data simulation
  • Responsive design, reusable UI libraries, and design systems
  • Developer handoff, prototype sharing, and simultaneous co-editing
  • Variables, reusable components, and design-system support
  • Multiple preview modes, including offline mobile preview
  • Detailed sharing links, comments, threads, and user-testing links
Cons
  • The Free plan is limited to 1 project
  • Advanced features begin with the $19 Standard plan
  • HTML export is included in the $29 Professional plan
  • Concurrent editing is unavailable
  • The product is web-based rather than a desktop app
  • Plan limits vary by users and active projects
Our verdict

Justinmind is a UI and UX design tool for creating wireframes, visual designs, interactive prototypes, and functional simulations for web and mobile applications. It suits product, UX, and design teams that need more than static screens,…

Read the review →

Proto.io is a web-based UI prototyping platform for UX designers, product managers, entrepreneurs, marketers, students, and product teams. Its drag-and-drop editor supports interface construction with component libraries and templates,…

Read the review →
  1. JustinmindUI Design Tools 8.6Free plan · 10-day trial
  2. Proto.ioUI Design Tools 7.8Free plan · 15-day trial

Strengths and trade-offs

  • Justinmind — where it wins

    • Conditional logic, forms, variables, and data simulation
    • Responsive design, reusable UI libraries, and design systems
    • Developer handoff, prototype sharing, and simultaneous co-editing

    Where it doesn't

    • The Free plan is limited to 1 project
    • Advanced features begin with the $19 Standard plan
    • HTML export is included in the $29 Professional plan

  • Proto.io — where it wins

    • Variables, reusable components, and design-system support
    • Multiple preview modes, including offline mobile preview
    • Detailed sharing links, comments, threads, and user-testing links

    Where it doesn't

    • Concurrent editing is unavailable
    • The product is web-based rather than a desktop app
    • Plan limits vary by users and active projects
  • Justinmind8.6/10 · Free plan · 10-day trial

    A broad UI design suite for teams that need logic-rich, shareable prototypes.

    Visit JustinmindFull verdict →
  • Proto.io7.8/10 · Free plan · 15-day trial

    A feature-rich prototyping tool with extensive sharing controls but no concurrent editing.

    Visit Proto.ioFull verdict →

More comparisons

All UI design tools comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update