Proto.io

For UX/UI designers and product teams who need high-fidelity interactive prototypes that feel like real apps—without writing code and without treating Figma as the only canvas. Proto.io covers wireframe-to-hi-fi flows, gestures, states, reviewer sharing, and device preview, with imports from common design tools. Prefer Figma for everyday UI systems, Justinmind for desktop wireframe traditions, or Banani when AI screen generation is the job.

Wireframing & Prototyping

Free trial

Use it when

You need no-code interactive web/mobile prototypes for stakeholder review and device preview—and you can move past the 15-day trial onto a paid seat/project plan.

What it does well

Interactive prototyping without code: flows, gestures, states, and app-like previews
15-day full-featured free trial (no credit card) to evaluate before buying
Freelancer / Startup / Agency / Corporate scale by users and active projects (5 → 10 → 15 → 30) with unlimited reviewers
Paid plans include share/comments, HTML/PNG/PDF export, branding, and imports from Sketch, Figma, Adobe XD, Photoshop (per site FAQ)
Enterprise path for more seats, unlimited projects, SSO, and security needs

Skip it when

You need a permanent free Freemium sandbox—the public pricing story is trial-then-paid
Your daily driver is Figma design systems and multiplayer UI craft—not a dedicated prototype tool
You want AI prompt-to-multi-screen UI—use Banani or similar
Code export / production app generation is the goal—TeleportHQ, Lovable, or a real IDE fit better
Active project caps on lower tiers will block a large portfolio—budget Agency/Corporate or Enterprise

Fits your workflow

Trial Proto.io → build interactive flows → share with reviewers / preview on device → export HTML or stills for handoff → keep visual system work in Figma when needed. Upgrade before the trial ends if active projects and seats matter.