Proto.io review
A feature-rich prototyping tool with extensive sharing controls but no concurrent editing.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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, while interactive links, gestures, events, animations, variables, and reusable containers support more detailed prototype behavior. Projects can be previewed on the web or through iOS and Android Player apps.
Sharing is a notable strength. Proto.io supports public, password-protected, reviewer, snapshot, and live share links, along with comments, discussion threads, and user-testing links. Teams can export prototypes and UI assets to PDF, PNG, HTML, and other formats, and connect workflows with Figma, Sketch, Adobe XD, Adobe Photoshop, Jira, Confluence, Trello, Google Fonts, and Adobe Fonts. Offline mobile preview adds flexibility when reviewing prototypes away from a browser.
The free plan and 15-day free trial provide entry points for evaluation. Paid plans are organized by team size and project capacity: Freelancer includes 1 user and 5 active projects; Startup includes 2 users and 10 active projects; Agency includes 5 users and 15 active projects; and Corporate includes 10 users and 30 active projects. Each plan includes unlimited reviewers. Proto.io is a strong fit for teams that need sophisticated interactions and controlled sharing, but teams requiring concurrent editing should choose a tool that supports real-time collaboration.
Proto.io pros and cons
- 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
Proto.io fact sheet, pricing and score →
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.
Last updated · How we research and update