Instead of Fluid UI
Fluid UI alternatives
Fluid UI is built for creating and sharing app mockups, with more than 2,000 components across Material Design, iOS, Windows and wireframe libraries. Its prototypes can respond to taps, swipes, clicks and other gestures, with page animations and real-time team collaboration. Reviewers can click through a shared prototype, chat, annotate and comment, and the service supports remote user testing. Work can be previewed through Android and iOS apps, alongside the browser and installable desktop client.
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Justinmind
Free plan AndroidAPIiPhone+4Web and mobile prototypes with forms and conditional interactions — Justinmind adds interactive forms, data lists, grids, action sequences and conditions to web and mobile prototypes.
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ProtoPie
by ProtoPieFree plan AndroidAPIiPhone+4High-fidelity interactive experience prototyping — ProtoPie focuses on high-fidelity prototypes for creating and testing interactive digital experiences.
Free plan · paid from $25/mo Visit site - 4
UXPin
by UXPinFree plan AndroidiPhoneMac+2Teams needing a free tier with prototype limits — UXPin’s free plan is limited to two prototypes and 50 AI credits, with annual billing saving 40%.
Free plan · paid from $29/user/mo (annual) · 14-day trial Visit site - 5
FlowMapp
Free plan LinuxMacWeb+1Website planning and project pitching — FlowMapp focuses on UX planning with sitemaps, user flows, wireframes, content, estimates and invoices rather than app mockups.
Free plan · paid from $15/mo Visit site - 6
Lunacy
Free plan APILinuxMac+3Graphic design with built-in assets and AI tools — Lunacy is a graphic design app with built-in assets, offline mode and AI image and text tools.
Free plan · paid from $4.99/mo Visit site - 7
Wondershare Mockitt
by Wondershare MockittFree plan AndroidiPhoneLinux+4Collaborative product design with developer handoff — Mockitt combines prototyping with UI design, whiteboarding, AI slides and developer handoff.
Free plan · paid from $10/user/mo Visit site - 8
Frame0
Free plan LinuxMacWindows - 9
MockFlow
Free plan ExtensionMacWeb+1 - 10
MockupTiger
Free plan LinuxMacSelf-hosted+2 - 11
Banani
Free plan Web - 12
Draftium
Free plan Web - 13
Moqups
Free plan APIExtensionWeb - 14
Quickmock
Free plan AndroidAPIExtension+6 - 15
Pencil Project
Free plan LinuxMacWindows - 16
LK Forge Wireframe Tool
Free plan Web - 17
Mokkup.ai
Free plan Web - 18
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PuMi
Free plan Web - 20
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Snapwire
Free plan Web - 22
Visily
Free plan ExtensionWeb - 23
Wireflow
Free plan Self-hostedWeb - 24
Wirify
Free plan ExtensionWeb - 25
Wireframe.cc
Free plan Web - 26
Wire Studio
Free plan Web - 27
Grapholite
Free trial AndroidiPhoneMac+2 - 28
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HotGloo
Free trial Web
A free plan is available, while paid plans start at $8.25 per month; the Team plan adds real-time collaboration for five users. If you need more elaborate interaction logic, handoff materials for developers, planning tools, or a broader design workspace, another product may suit your work better. Compare the type of work each tool supports, its collaboration and review options, platforms, and starting price. A switch may also mean trading Fluid UI’s mobile preview apps or focused app-mockup workflow for different design or delivery tools.