Fluid UI
Prototyping software
Software design software
- Features
- Ease of use
- Ease of management
- Quality of support
- Affordability
- Market presence
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$8.25 per month
Free Trial unavailable
Free version
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What is Fluid UI
Fluid UI is a web-based prototyping tool used to create interactive wireframes and clickable prototypes for web and mobile applications. It supports building screens from UI libraries, linking interactions between screens, and sharing prototypes for review. The product is typically used by UX/UI designers, product teams, and stakeholders who need to validate flows and gather feedback before development. It differentiates through a lightweight, browser-first approach focused on rapid interactive prototyping and stakeholder sharing.
Fast clickable prototype creation
Fluid UI focuses on quickly assembling screens and linking them into interactive flows. Teams can create prototypes suitable for early usability checks and stakeholder walkthroughs without writing code. This fits common discovery and validation workflows where speed matters more than high-fidelity visuals. The interaction model is oriented around screen-to-screen navigation and hotspots, which is straightforward for non-technical reviewers.
Built-in UI libraries
The product includes reusable UI components and libraries to accelerate wireframing and prototyping. This reduces the need to start from blank canvases for common patterns such as mobile controls and basic layout elements. Libraries help maintain consistency across screens within a prototype. For teams that do not maintain a separate design system, these assets can shorten setup time.
Sharing and review workflow
Fluid UI supports sharing prototypes with others for review, enabling feedback cycles with stakeholders. This is useful for distributed teams that need a single link to access the latest prototype. Review-oriented sharing helps align product, design, and business stakeholders on user flows. It also supports presenting prototypes in a way that resembles an app walkthrough.
Limited high-fidelity design depth
Fluid UI is primarily oriented toward prototyping and wireframing rather than full-spectrum interface design. Teams that require advanced vector editing, complex typography controls, or comprehensive design-system management may need additional tools. This can introduce handoff friction when moving from prototype to production-ready UI specifications. The gap is more noticeable for organizations standardizing on a single design platform.
Interaction complexity constraints
The interaction model is well-suited to basic navigation and hotspot-driven flows but can be restrictive for complex micro-interactions. Prototypes that require rich animations, conditional logic, or highly dynamic states may be harder to represent. As a result, some product behaviors may need to be explained separately rather than demonstrated. This can limit the prototype’s usefulness for validating nuanced interactions.
Ecosystem and integrations uncertainty
Compared with larger design ecosystems, available integrations and extensibility can be more limited or less standardized. If a team relies on deep integrations with issue tracking, developer handoff, or component pipelines, they may need workarounds. This can increase operational overhead in mature product organizations. Buyers typically need to validate integration coverage during evaluation.
Plan & Pricing
| Plan | Price | Key features & notes |
|---|---|---|
| Free (Free forever) | $0 — Free lifetime account | 1 project (page limits not shown on page), 1 user license, Unlimited reviewers; "Free forever" stated on official plans page and call-to-action to sign up for a free lifetime account. |
| Solo | $8.25/month or $99/year | 5 active projects; 1 user license (you); Unlimited reviewers; Includes all libraries, unlimited uploads, reviewing and on-device testing with the player app. |
| Pro | $19.08/month or $229/year | 10 projects; 1 user license (you); Unlimited reviewers; Export, print and comment; Pro lets reviewers add comments. |
| Team | $41.58/month or $499/year | Unlimited projects; 5 users (including you); Unlimited reviewers; Export, print and comment; Real-time team collaboration; "Unlimited access to every feature for your entire team with just a single licence." |
