vioscale
UI/UX & Prototyping ToolsUnclaimed

Proto.io

Prototyping for all. Bring your idea to life in no time.

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Also known as
proto-io

What is Proto.io?

A 100% web-based, no-code prototyping solution with drag-and-drop interface for designers, entrepreneurs, product managers, and marketers. Includes UI component libraries, templates, animations, and interactive elements.

Independently observed

Proto.io pricing

Plans, per-tier features and add-ons, dated and linked to live pricing. Pricing changes often; always verify at source before you rely on it.

Pricing as of verify at live pricing ↗Independently observed
from $29/moSubscriptionFree tier15-day trial

From $29/month (Freelancer). Free tier available. Up to 20% savings on annual billing. 15-day free trial, no credit card required.

Freelancer

$29/month or $24/month billed annually
monthly · min 1 seats
users
1
storage
None
active_projects
5
  • Preview in Player
  • Preview in Proto.io App
  • Share
  • Comments
  • Unlimited reviewers
  • Export to HTML/PNG/PDF
  • Branding
  • Import from Sketch/Figma/Adobe XD/Photoshop
  • 256-bit SSL encryption
  • Real-time chat support

Startup

$49/month or $40/month billed annually
monthly · min 2 seats

Most popular

users
2
storage
None
active_projects
10
  • Preview in Player
  • Preview in Proto.io App
  • Share
  • Comments
  • Unlimited reviewers
  • Export to HTML/PNG/PDF
  • Branding
  • Import from Sketch/Figma/Adobe XD/Photoshop
  • 256-bit SSL encryption
  • Real-time chat support

Agency

$99/month or $80/month billed annually
monthly · min 5 seats
users
5
storage
None
active_projects
15
  • Preview in Player
  • Preview in Proto.io App
  • Share
  • Comments
  • Unlimited reviewers
  • Export to HTML/PNG/PDF
  • Branding
  • Import from Sketch/Figma/Adobe XD/Photoshop
  • 256-bit SSL encryption
  • Real-time chat support

Corporate

$199/month or $160/month billed annually
monthly · min 10 seats
users
10
storage
None
active_projects
30
  • Preview in Player
  • Preview in Proto.io App
  • Share
  • Comments
  • Unlimited reviewers
  • Export to HTML/PNG/PDF
  • Branding
  • Import from Sketch/Figma/Adobe XD/Photoshop
  • 256-bit SSL encryption
  • Real-time chat support

Enterprise

Contact sales
Contact sales

Unlimited projects, SSO, enterprise-grade security

active_projects
unlimited

Free

Free
Free
min 1 seats

Limited features

users
1
storage
10 MB
active_projects
1
prototype_screens
5
  • Preview in Proto.io App
  • Export to HTML
  • Export to PNG/PDF
  • Import from design tools
  • Branding
  • Single-click sharing
  • No additional reviewers

What Proto.io does

The capabilities that matter for ui/ux & prototyping tools, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.

Design
Vector UI design
✓
Component / design-system libraries
✓
Auto layout / responsive
✗
Prototyping
Clickable prototyping
✓
Advanced interactions (variables / conditions)
✓
Collaboration
Real-time multiplayer collaboration
✗
Handoff
Dev handoff / spec export
✓
Platform
Platform breadth (Web / macOS / Windows / Linux / self-hosted)
Web-based (100% web), mobile browser preview, iOS/Android component libraries
Licensing
Self-hostable / open-source
✗
AI
AI design assist
✗
Pricing
Pricing model
Freemium
Ecosystem
Plugin / community ecosystem
-
Independently observed

Platform & deployment

Independently observed
Platforms
  • Web
Deployment
  • Cloud / SaaS

Integrations (4)

Independently observed
  • Sketch
  • Figma
  • Adobe XD
  • Photoshop

Proto.io alternatives

Other ui/ux & prototyping tools we track, ranked by the same independent score.

Independent · unbought · dated

The Vioscale score: one lens on the evidence

Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for Proto.io, not the verdict.

Balanced composite 64 / 100
low · 40%
Signal contributions to the composite score
SignalScoreWeightContributionEvidence
Capabilities7532.002391.1✓
Pricing Transparency10016.001600.0✓
Price Level5010.00500.0✓
Integrations2018.00361.8✓
Reliability012.000.0-
Security Posture012.000.0-

Computed . Re-weight it by intent, or see the full method.

All data & sourcesshow ↓

Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.

Features

AttributeValueEvidence
Capabilities{"ai_design":false,"auto_layout":false,"dev_handoff":true,"pricing_model":"freemium","self_hostable":false,"vector_design":true,"platform_breadth":"Web-based (100% web), mobile browser preview, iOS/Android component libraries","component_libraries":true,"advanced_interactions":true,"clickable_prototyping":true,"realtime_collaboration":false}mediumsource · 2026-08-04 · 60%

Integrations

AttributeValueEvidence
Count4mediumsource · 2026-08-04 · 60%

Pricing

AttributeValueEvidence
Free tierYeslowsource · 2026-08-04 · 48%
Modelfreemiumhighsource · 2026-08-04 · 80%
Price levelmidmediumsource · 2026-08-04 · 60%
Starting gbp29mediumsource · 2026-08-04 · 60%
TransparentYesmediumsource · 2026-08-04 · 60%