Overview

Justinmind is a prototyping tool for teams shaping web and mobile interfaces, from early wireframes to detailed simulations. It suits designers, analysts and developers who need to demonstrate behavior and coordinate reusable UI assets; it is less compelling if a team needs several projects on a free plan.

Key features

Justinmind’s value is in connecting screen design to interaction logic. Teams can build web interactions, mobile gestures, action sequences and conditional behavior without code, then model interactive forms, data lists and grids. That makes it useful for reviewing flows that depend on input or data, rather than just presenting a sequence of static screens.

Shared UI kits, synchronized components, templates and masters help teams keep repeated interface elements aligned. Multiple users can edit a prototype simultaneously, while version control tracks changes. The combination supports collaborative work, though the strongest shared-library and collaboration features are paid-plan inclusions.

Prototypes can be exported as interactive HTML, with assets exported as SVG or PNG; the API can generate specification assets. Prototype sharing and developer handoff support the transition from design to implementation. Integrations include Figma, Adobe XD, Sketch, JIRA, Azure DevOps and user-testing tools.

Pricing

Justinmind has a free tier and a 10-day trial. Paid plans are priced per editor, so team costs rise with the number of seats.

Free — 0.00 USD per free (billed $0 per editor/month): one project, unlimited screens and viewers, UI design and wireframing, interactive input forms, vector design, and PNG, JPG and SVG export. It is a useful way to build or share a single prototype, but the project cap constrains ongoing work across multiple initiatives.
Standard — 19.00 USD per month (billed $19 per editor/month): unlimited projects, advanced interaction design and collaboration, mobile device testing, and shared UI libraries. This is the entry paid tier for teams that need several projects and shared assets, but it does not include the Professional tier’s data simulation or HTML export.
Professional — 29.00 USD per month (billed $29 per editor/month): adds data simulation, user flows, HTML export, user-testing integration and custom branding to unlimited projects. It fits teams that need richer behavioral prototypes and branded output.
Enterprise — 59.00 USD per month (billed $59 per editor/month): adds SAML single sign-on, shared fonts, document export, requirements management, JIRA and Azure DevOps integration, and priority support. It is aimed at organizations that need identity controls, requirements workflows or prioritized assistance.

Platforms

Justinmind supports Android, iOS, macOS, Windows and web, with desktop, mobile, cloud and self-hosted deployment options. That range gives teams flexibility across device testing and deployment preferences. Support channels include email, tickets, community and documentation. The product states GDPR and PCI DSS compliance. 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.

Who it's for

Justinmind is suited to design teams, business analysts and developers who need realistic web or mobile prototypes, reusable UI assets and a route into developer handoff. Small teams can start with the one-project free tier; mid-market and enterprise teams can move to paid plans as project, collaboration and governance needs grow. Teams primarily seeking a free multi-project workspace should look elsewhere.

Pros and cons

Pro: Interactions, conditions, gestures and simulated data let teams communicate behavior beyond screen layouts.
Pro: Simultaneous editing, change tracking and synchronized UI assets support shared design work.
Pro: Export options span interactive HTML and common vector or raster assets, with specification generation through the API.
Con: The free plan permits only one project, despite unlimited screens and viewers.
Con: HTML export and data simulation require Professional, while SSO and requirements management are reserved for Enterprise.
Con: Per-editor pricing makes seat count a direct factor in the cost of team adoption.

Alternatives

Consider Marvel if a one-user, one-project free plan is sufficient or if its Pro plan’s unlimited projects for 12.00 USD per month better fits the budget. Choose Penpot if its free offering and web, API and self-hosted platform options suit your setup. ProtoPie is another freemium prototyping option; its Free plan caps cloud storage at 50MB and saved prototypes at two.

Mockplus may suit teams whose needs fit its free Basic allowance of 10 users and 10 active projects. UXPin offers a limited free plan after its 14-day trial, with two prototypes and 50 AI credits. Consider Fluid UI for its free lifetime account or its Solo plan at 8.25 USD per month. Lunacy is an option for teams that can work within its free tier of 10 cloud documents and 30 days of version history. Proto.io has a free plan capped at one user, one active project and five prototype screens.

For broader comparisons, browse UI design tools, Wireframing Software, Prototyping Software, Web Design Software, Game UI Design Software and Developer Handoff Software.

Verdict

Justinmind is a strong fit for teams that need interactive web and mobile prototypes, reusable UI components and collaboration in one workflow. Its key advantage is the ability to model behavior and data rather than stop at wireframes; its main drawback is that useful capabilities such as multi-project work are gated behind per-editor paid plans. Choose it when prototype depth and handoff matter more than keeping every project on a free tier.

	Justinmind	Sketch
Free plan	Yes	No
Free trial	No	No
Paid from	$19/mo	—
Open source	No	No
Platforms	Android, api, iOS, macOS, self-hosted, Web, Windows	iOS, macOS, Web
Free plan	Yes	No
Design systems	Yes	Yes
Paid from	—	12 /user/mo

Justinmind vs Sketch

Justinmind

Sketch