Justinmind

Justinmind is an interaction design and prototyping tool for web and mobile apps, supporting wireframes, high-fidelity prototypes, and simulations. Users can build web interactions, mobile gestures, action sequences, and conditions without code, then simulate forms, data lists, and grids. Multiple users can edit a prototype simultaneously, while version control tracks changes. UI kits, synchronized shared components, templates, and masters support reuse. Prototypes can be exported as interactive HTML, and assets as SVG or PNG; the API can generate specification assets. Integrations include Figma, Adobe XD, Sketch, JIRA, Azure DevOps, and user-testing tools. Deployment options include cloud, self-hosted, desktop, and mobile. The Free plan is $0 per editor/month and allows unlimited screens but only one project. Standard is $19 per editor/month, Professional is $29 per editor/month, and Enterprise is $59 per editor/month. A 10-day trial is listed. The company describes the tool as useful to design teams, business analysts, and developers working with UI assets and design handoff.

Justinmind covers prototyping, simulation, collaboration, and handoff across several deployment options. The Free plan provides unlimited screens but caps work at one project; paid plans expand project access and features.

Justinmind suits design teams, business analysts, and developers who need to create and share interactive web or mobile prototypes. Its simultaneous editing, version tracking, and UI libraries also suit collaborative design work.

Overview

Justinmind is an interaction-design and prototyping tool for teams shaping web and mobile apps, particularly designers, business analysts and developers who need to communicate how an interface should behave. Its strongest case is for projects that benefit from realistic interactions, simulated data and shared design assets; teams working mainly on static layouts may not need that breadth.

Key features

Justinmind lets users build wireframes and high-fidelity prototypes with web interactions, mobile gestures, action sequences and conditions, without writing code. That makes it useful for demonstrating behavior before developers build it, rather than relying on screens alone. Interactive forms, data lists and grids extend prototypes to data-driven flows, though data simulation is reserved for Professional.

Multiple users can edit a prototype simultaneously, and version control tracks changes. UI kits, synchronized shared components, templates and masters give teams ways to keep repeated interface elements consistent. These capabilities make the product more compelling for collaborative design systems than for one-off mockups.

Prototypes can be shared and exported as interactive HTML; assets can be exported as SVG or PNG, and the API can generate specification assets. Integrations include Figma, Adobe XD, Sketch, JIRA, Azure DevOps and user-testing tools. Together with developer handoff, these options support a path from design work toward implementation.

Pricing

The Free plan costs nothing, billed $0 per editor/month. It allows one project with unlimited screens and viewers, and includes UI design and wireframing, interactive input forms, vector design, and PNG, JPG and SVG export. It is a useful way to work without a screen cap, but the single-project ceiling makes it restrictive for anyone managing several initiatives.

Standard costs $19 a month, billed $19 per editor/month. It adds unlimited projects, advanced interaction design and collaboration, mobile device testing, and shared UI libraries. This is the natural step up for teams that outgrow the free project limit and need shared assets, while projects requiring data simulation or HTML export will need a higher tier.

Professional costs $29 a month, billed $29 per editor/month. It includes unlimited projects, data simulation, user flows, HTML export, user-testing integration and custom branding. It suits teams presenting richer, data-driven prototypes or incorporating user testing into the workflow.

Enterprise costs $59 a month, billed $59 per editor/month. SAML single sign-on, shared fonts, document export, requirements management, JIRA and Azure DevOps integration, and priority support target organizations with formal access and handoff needs. The listed trial lasts 10 days. The plans are priced per editor; the Free plan separately includes unlimited viewers.

Platforms

Justinmind supports Android, iOS, macOS, Windows, web, API and self-hosted environments. Deployment options include cloud, self-hosted, desktop and mobile, giving teams a choice beyond a browser-only workflow. Support channels include email, ticket, community and documentation. Its privacy policy says it takes reasonable measures to protect personal data and will notify materially affected users of a breach within 72 hours; payment data goes directly to Braintree rather than being collected by Justinmind. The company cites GDPR and PCI DSS compliance.

Who it's for

Justinmind is a strong fit for small, mid-market and enterprise teams that need interactive prototypes, concurrent editing, reusable UI assets or developer handoff. The free tier can serve an individual or team focused on one project. Choose a paid plan when the one-project cap becomes a problem, and choose Professional or Enterprise when simulation, exports, requirements management or identity controls matter. It is less suited to users seeking only a lightweight static wireframing tool.

Pros and cons

• Pro: Unlimited screens and viewers on Free make it possible to develop and share a substantial single-project prototype without a screen quota.
• Pro: No-code interactions, gestures, conditions and simulated forms allow prototypes to communicate behavior, not just layout.
• Pro: Simultaneous editing, version tracking and reusable UI libraries support collaborative work and consistency.
• Con: Free is limited to one project, so parallel work requires a paid plan.
• Con: Data simulation and HTML export begin at Professional, while SSO and requirements management are Enterprise features.

Alternatives

Consider Mockplus if a free plan with multiple users and active projects is the priority: its Basic plan allows 10 users and 10 active projects, while Justinmind Free allows one project. Pixso is another freemium option; its Free plan includes unlimited viewer seats and draft files, with three design files and three whiteboard files. Choose ProtoPie if its free allowance of two cloud prototypes, eight scenes per prototype and 50MB of cloud storage fits your prototyping needs better.

UXPin offers a Limited Free plan after a 14-day trial, with two prototypes and 50 AI credits. Figma Dev Mode may suit readers seeking developer-focused access within Figma; its Starter plan provides limited access to Figma products and unlimited drafts. Marvel has a free plan for one user and one project, while its Pro plan costs $12 a month, billed yearly.

Sketch is a paid alternative with a Standard plan at $12 a month, billed yearly per editor, including real-time collaboration and unlimited documents. Lunacy offers a free plan with up to 10 cloud documents, 10 document editors or exporters, and 30 days of version history.

Browse Developer Handoff Software, Web Design Software, Wireframing Software, Prototyping Software, Game UI Design Software or UI design tools for more options by category.

Verdict

Choose Justinmind if your team needs to model interface behavior, share reusable components and carry prototypes into handoff, with plans ranging from a one-project free tier to enterprise controls. Its main drawback is that meaningful project and simulation capabilities are split across paid tiers, so teams that need only simple wireframes or broader free project access should compare alternatives.