Free and open first

Best Prototyping tools in 2026

30 apps
Research read 28 Sept 2026
How the order is worked out

1

UXPin
by UXPin
Free plan AndroidiPhoneMac+2

UXPin combines interactive prototyping, coded libraries and team sharing across web and desktop platforms.

7.7 Free plan · paid from $29/user/mo (annual) · 14-day trial Visit site
2

Justinmind

Free plan AndroidAPIiPhone+4

Justinmind combines interactive prototyping, collaboration, reusable UI assets, and export options.

7.6 Free plan · paid from $19/mo · 10-day trial Visit site
3

ProtoPie
by ProtoPie
Free plan AndroidAPIiPhone+4

ProtoPie combines detailed interaction options with cross-device prototyping and a free starting plan. Check the free-plan limits and .pie-only export format against your workflow.

7.6 Free plan · paid from $25/mo Visit site
4

Mockplus
by Mockplus
Free plan AndroidExtensioniPhone+4

Mockplus combines prototyping with developer handoff and collaboration tools, with free options and paid plans for expanded use.

7.6 Free plan · paid from $5.95/user/mo (annual) Visit site
5

Wondershare Mockitt
by Wondershare Mockitt
Free plan AndroidiPhoneLinux+4

Mockitt combines interactive prototyping with collaboration, design-system, and handoff capabilities. Plan choice depends on the workspace, file, collaborator, and AI-credit allowances required.

7.6 Free plan · paid from $10/user/mo Visit site
6

Moqups

Free plan APIExtensionWeb

Moqups brings several design and collaboration activities into one browser-based workspace.

7.4 Free plan · paid from $7/user/mo (annual) Visit site
7

Marvel
by Marvel
Free plan AndroidAPIiPhone+1

Marvel brings concept design, interactive presentations and developer handoff into one platform. Check the one-project free-plan limit and annual Pro pricing against your team's needs.

7.4 Free plan · paid from $12/user/mo (annual) · 7-day trial Visit site
8

Proto.io
by Proto.io
Free plan AndroidiPhoneWeb

Proto.io combines interactive prototyping, asset libraries, and sharing in a browser-based tool. The free plan has tight project, screen, and storage limits; paid monthly plans start at $29 a month.

7.3 Free plan · 15-day trial Visit site
9

Fluid UI
by Fluid UI
Free plan AndroidiPhoneLinux+3

Fluid UI combines mockup creation, interactive prototyping and review features, with plans ranging from a free account to paid options.

7.3 Free plan · paid from $8.25/mo Visit site
10

Visily

Free plan ExtensionWeb

Visily combines AI-assisted design inputs, templates, and team editing in a browser-based tool.

7.2 Free plan · paid from $11/user/mo (annual) Visit site
11

Quant-UX
by Quant-UX
Free plan Self-hostedWeb

Quant-UX combines interactive prototyping with testing and built-in analytics, with unlimited prototypes and tests on its Free plan.

7.1 Free plan Visit site
12

Origami Studio

Free plan AndroidiPhoneMac

Choose Origami Studio if you need a free tool for creating interactive interface prototypes, with video export and mobile preview through Origami Live.

7.1 Free plan Visit site
13

PrototypeTool

Free plan Web

Pick PrototypeTool if you need web-based interactive prototypes and want an individual free tier or team collaboration features on Pro.

7.0 Free plan · paid from $29/mo Visit site
14

Uizard
by Uizard
Free plan ExtensionWeb

Choose Uizard if you want web-based design with prototyping, sharing, collaboration, and developer handoff.

7.0 Free plan · paid from $12/user/mo (annual) Visit site
15

Frame0

Free plan LinuxMacWindows

Frame0 covers wireframing, interactive prototyping, and several diagram types in a file-based desktop app.

7.0 Free plan · paid from $79 Visit site
16

Alloy

Free plan Extension

Alloy offers a free starting tier and paid plans with different support and security options. Check whether the free credits and codebase setup fit your team's workflow.

6.9 Free plan · paid from $20/user/mo Visit site
17

Pencil Project

Free plan LinuxMacWindows

Pencil combines interface-specific stencils, diagram shapes, and a range of export options in a desktop tool. Its links between document pages can carry through to web exports as hyperlinks.

6.9 Free plan Visit site
18

Figma Slides

Free plan AndroidiPhoneLinux+3

Figma Slides combines presentation creation with team collaboration, audience engagement, and connections to other Figma tools.

6.9 Free plan · paid from $3/user/mo Visit site
19

NinjaMock
by NinjaMock
Free plan Web

NinjaMock combines wireframing, linked prototypes, vector editing, collaboration, and video playback.

6.8 Free plan Visit site
20

Mockapp

Free plan AndroidiPhone

Mockapp covers mobile prototype sharing, feedback, and design updates before development, with a free plan that does not limit testing or installation.

6.7 Free plan Visit site
21

ProtoSketch
by ProtoSketch
Free plan iPhoneMac

ProtoSketch offers a broad set of vector drawing and layout tools, with a free Lite tier for smaller projects.

6.6 Free plan Visit site
22

PVSio-Web

Free plan Web

PVSio-Web combines interface prototyping with formal modeling, simulation, and verification workflows. Its read-only live version and PVS requirements matter when choosing how to use it.

6.2 Open source Visit site
23

Axure RP
by Axure RP
Free trial Mac

Axure RP combines interactive prototyping with adaptive views and Cloud sharing. Compare Pro and Team based on whether you need team collaboration features.

6.1 From $29/user/mo · 30-day trial Visit site
24

Principle

Free trial iPhoneMacSelf-hosted+1

Principle combines animation controls, interaction prototyping, screen-flow views, imports, sharing, and exports in one tool. Check the one-computer license and renewal terms before choosing it.

6.1 From $129 · 14-day trial Visit site
25

Flinto

Free trial AndroidiPhoneMac+1

Flinto provides detailed interaction controls on Mac alongside a web-based Lite workflow. Its paid plans and platform requirements should be checked against your prototyping setup.

6.0 From $99 · 14-day trial Visit site

#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price

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