Best Interface Design Tools in 2026

Mockplus

Mockplus is a product design platform for rapid prototyping, collaboration and design systems.

Marvel

Marvel is a design platform for creating wireframes, mockups, interactive prototypes, and design specifications in one place.

ProtoPie

ProtoPie is a high-fidelity prototyping platform for creating and testing interactive digital experiences.

Fluid UI

Fluid UI is a web-based tool for creating, editing, previewing, sharing, and exporting mockups of mobile apps.

Proto.io

Proto.io is a web-based, no-code tool for creating interactive prototypes for iOS, Android, and web.

Moqups

Moqups combines wireframing, mockups, diagrams, prototypes, and whiteboarding in an online app.

Visily

Visily is a browser-based AI UI design tool for people who need app mockups and product designs.

Flinto

Flinto is a paid prototyping tool for interactive, animated app designs.

Sketch

Sketch covers product design work from interface creation through design systems, interactive prototypes, and developer handoff.

Penpot

Penpot is an open-source design platform for teams that supports collaboration between designers and developers.

NinjaMock

NinjaMock is a web tool for designing app and website mockups, building navigable prototypes, and sharing work with collaborators.

Wireframe.cc

Wireframe.cc is a web-based tool for sketching page layouts and interface ideas.

MockFlow

MockFlow is a visual workspace for brainstorming and planning with diagrams, mind maps, flowcharts, moodboards, storyboards, wireframes, and lite prototypes.

Axure RP

Axure RP is a prototyping tool for creating interactive UX designs with triggers, conditions, actions, and variables.

Uizard

Uizard is a cloud-based design tool available on the web and as a browser extension.

WireframeSketcher

WireframeSketcher is a paid desktop application and Eclipse plug-in for creating wireframes, mockups, and prototypes for desktop, web, and mobile applications.

Origami Studio

Origami Studio is a free design tool for building and sharing interactive interface prototypes.

Pencil Project

Pencil Project is a free, open-source desktop tool for creating GUI mockups, wireframes, and diagrams.

Balsamiq Wireframes

Balsamiq Wireframes is a wireframing and prototyping tool available for macOS, Windows, and the web, with both desktop and cloud deployment.

Quant-UX

Quant-UX is a research, usability and prototyping tool for creating interactive designs and collecting data-driven insights.

Wireflow

Wireflow is a browser-based tool for creating user flow prototypes, with no installation required.

Principle