Quant-UX
Prototyping Tools
Open-source prototyping and user testing platform with quantitative analytics for UX research teams.
Free planA/B TestingUI/UX Design
Alternatives to Pencil Project
- 1Prototyping Tools
- 2Prototyping Tools
Proto.io
Prototyping Tools
High-fidelity mobile and web prototyping tool with animations, device preview, and user testing integrations.
Mobile device preview and testingVersion control and automatic backupsPrice$29 / month
- 3Prototyping Tools
Penpot
Prototyping Tools
Penpot is an open-source design and prototyping platform that provides collaborative design tools, components, and design systems accessible through any browser.
Free planFree trialTiered plansAI AgentsCommunication & CollabPrice$7+ / seat / month
- 4Prototyping Tools
MockingBot
Prototyping Tools
Online prototyping tool for web and mobile apps with drag-and-drop widgets and team collaboration.
Free planDesign CollaborationRapid Prototyping - 5Prototyping Tools
Pidoco
Prototyping Tools
Online wireframing and prototyping tool for web and mobile apps with usability testing and collaboration features.
Free trialTiered plansWireframing ToolsRapid PrototypingPrice$19+ / month
- 6Prototyping Tools
Moqups
Wireframing Tools
Moqups provides wireframing, diagramming, and prototyping in a web-based platform.
Free planFree trialTiered plansDesign CollaborationProject ManagementPrice$7+ / month
- 7Prototyping Tools
Justinmind
Prototyping Tools
All-in-one prototyping tool for web and mobile apps with wireframing, interactive prototypes, and user testing capabilities.
Interactive prototyping without codeAdvanced interaction designMobile gesture supportPrice$9+ / user / month
- 8Prototyping Tools
Wireflow
Prototyping Tools
Free online user flow and wireframe tool for quickly sketching process flows and user journeys.
Drag and drop wireframe canvasPre built wireframe templatesAI assisted flow generation - 9Prototyping Tools
ProtoPie
Prototyping Tools
ProtoPie is an advanced prototyping tool that enables designers to create highly interactive, realistic prototypes across devices including mobile, web, IoT, and automotive interfaces.
Free planFree trialAI Workflow BuildersMotion Design Tools - 10Prototyping Tools
Lunacy
Icon Design Tools
Lunacy by Icons8 is a free design tool with built-in assets and Figma compatibility.
Free planGraphic DesignDesign CollaborationPrice$11.99+ / month
