Proto.io

Name: Proto.io
Price: 29 USD
Author: Proto.io

Free plan AndroidiPhoneWeb

What Proto.io is

Proto.io is a web-based, no-code tool for creating interactive prototypes for iOS, Android, and web. It includes native iOS and Android apps, more than 250 UI components that mimic native behavior, and over 1,000 customizable templates for mobile and web projects. Its library contains more than 6,000 icons, images, and sound effects. Prototypes can combine over 80 events and over 40 actions, use nested or multidirectional scrolling, and link screens with 18 built-in transitions. Users can share links and snapshots or export to HTML, PNG, and PDF, and the product supports user testing through popular platforms. The free plan is limited to one user, one active project, five screens, and 10 MB of storage; it includes single-click sharing but no additional reviewers. Paid plans include 256-bit SSL encryption. Freelancer is $29 a month, and a 15-day trial is listed.

Who it suits

Proto.io suits individuals and teams creating interactive prototypes for mobile and web products. Its templates, UI components, sharing, and user-testing support are relevant to prototyping and review workflows.

What it does well

Works in a browser without coding skills.
Supports iOS, Android, and web prototypes.
Includes more than 250 UI components.
Offers over 1,000 customizable templates.
Exports to HTML, PNG, and PDF.

What to know first

Free plan allows one active project.
Free plan is limited to five screens.
Free plan has 10 MB storage.
Free plan has no additional reviewers.

Limits

The free plan includes one user, one active project, five prototype screens, and 10 MB of storage, with no additional reviewers. It supports HTML, PNG, and PDF export, design-tool import, branding, and single-click sharing. A 15-day trial is listed; the Free Account is described as a limited-feature plan available after the trial expires.

Plans

Plan	Billed and limits	Price
Free plan	1 user · 1 active project · 5 prototype screens · 10 MB storage · No additional reviewers	On request
Freelancer	paid monthly · 1 user · 5 active projects	$29 a month
Startup	paid monthly · 2 users · 10 active projects	$49 a month
Agency	paid monthly · 5 users · 15 active projects	$99 a month
Corporate	paid monthly · 10 users · 30 active projects	$199 a month
Enterprise	Tailored plan · Additional users · Unlimited projects · SSO · Enterprise-grade security	On request
Free Account	—	On request

As proto.io lists them, read 21 Sept 2026. The maker's own page has the final word.

Getting started

Visit https://proto.io/.
Start with the free plan or use the 15-day trial.
Create prototypes for iOS, Android, or web in the web-based tool.
Share a link or snapshot, or export to PDF, PNG, or HTML.
Choose a paid plan if you need more users, active projects, or reviewers.

Verdict

Proto.io combines interactive prototyping, asset libraries, and sharing in a browser-based tool. The free plan has tight project, screen, and storage limits; paid monthly plans start at $29 a month.

Questions

Does Proto.io have a free plan?

Yes. The free plan includes one user, one active project, five prototype screens, and 10 MB of storage.

How much do paid plans cost?

Freelancer is $29 a month, with annual billing shown at $24 per month. Startup is $49 a month, Agency is $99 a month, and Corporate is $199 a month; Enterprise is tailored.

Which platforms can I prototype for?

Proto.io supports iOS, Android, and web prototypes. It also offers native iOS and Android apps.

Can I share or export prototypes?

Yes. You can share links and snapshots, or export to PDF, PNG, or HTML. The free plan includes single-click sharing and those export formats.

Does Proto.io require coding?

No. Proto.io is web-based and requires no coding skills.

What happens after the trial?

A limited-feature Free Account is available after the 15-day trial expires.

Facts from Proto.io's own pages

Digital Assets: The library includes more than 6,000 static and animated icons, stock images, and sound effects. · proto.io, 28 Sept 2026
SSL Encryption: Paid plans include 256-bit SSL encryption, and Proto.io uses industry-standard SSL security. · proto.io, 28 Sept 2026
Free plan: Yes · proto.io, 21 Sept 2026
Free Plan Exports: The free plan supports HTML, PNG, and PDF export, plus design-tool import and branding. · proto.io, 28 Sept 2026
Free Plan Limits: The free plan includes 1 user, 1 active project, 5 prototype screens, and 10 MB storage. · proto.io, 28 Sept 2026
Free Plan Sharing: The free plan includes single-click sharing but no additional reviewers. · proto.io, 28 Sept 2026
Free Trial: The trial lasts 15 days and requires no credit card. · proto.io, 28 Sept 2026
Headquarters: 44 Montgomery St. STE 300, San Francisco, CA 94104, United States · proto.io, 28 Sept 2026
Interaction Options: Proto.io offers over 80 events and over 40 actions, with nested and multidirectional scrolling. · proto.io, 28 Sept 2026
Screen Transitions: Users can connect screens with 18 built-in transitions. · proto.io, 28 Sept 2026
Sharing And Export: Users can share links, export to PDF, PNG, or HTML, and share snapshots at exact points in time. · proto.io, 28 Sept 2026
Supported Platforms: Proto.io supports iOS, Android, and web prototypes, with native iOS and Android apps. · proto.io, 28 Sept 2026
Support Resources: Resources include documentation, sample projects, video tutorials, guides, webinars, and case-by-case support. · proto.io, 28 Sept 2026
Team Security: Its granular security model supports working alone or in teams of any size. · proto.io, 28 Sept 2026
Template Library: Proto.io provides more than 1,000 customizable web and mobile templates. · proto.io, 28 Sept 2026
UI Components: The product includes more than 250 UI components that mimic native behavior. · proto.io, 28 Sept 2026
User Testing: Proto.io supports user testing with popular user testing platforms. · proto.io, 28 Sept 2026
Web-Based No-Code: Proto.io is web based and requires no coding skills. · proto.io, 28 Sept 2026