Dev tools · alternatives · 2026

24 alternatives to Pencil

An open-source prototyping tool avilable on all platforms

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Pencil launched in 2015; newer entries below may have overtaken it.

1. 1
   Precursor▲227

   A real-time collaborative prototyping tool

   2014 · prcrsr.com · its alternatives →

2. 2
   ProtoSketch▲137

   Powerful yet simple vector graphics editor and prototyping

   2015 · apps.apple.com · its alternatives →

3. 3
   Mitya▲87

   Prototyping for Interaction Designers

   2014 · mitya-app.com · its alternatives →

4. 4
   Tweak▲74

   a native iOS design prototyping tool

   2014 · its alternatives →

5. 5
   Proto.io▲135

   Fast, fully-interactive, high-fidelity mobile prototypes

   2014 · proto.io · its alternatives →

6. 6
   The Sketchbook Project▲87

   A crowd-sourced library of Sketchbooks

   2014 · its alternatives →

7. 7
   Form▲203

   Interaction & prototyping design tool for iOS apps

   2014 · m3.material.io · its alternatives →

8. 8
   Swik App▲71

   Free transitional interface design tool for prototyping

   2014 · its alternatives →

9. 9
   Brackets 1.0▲190

   An open-source text editor for web designers by Adobe

   2014 · github.com · its alternatives →

10. 10
    IBAnimatable▲125

    Design and prototype UI, interaction, navigation, transition

    2016 · github.com · its alternatives →

11. 11
    Prototypo▲83

    Streamlining font creation with open source typeface editor

    2014 · mathey.notion.site · its alternatives →

12. 12
    Flinto▲52

    Super easy tool for prototyping

    2014 · flinto.com · its alternatives →

13. 13
    Mosaic▲161

    The app for ideas

    2015 · baronfig.com · its alternatives →

14. 14
    Feedbag▲131

    A super lightweight design collaboration tool.

    2014 · its alternatives →

15. 15
    Loose Leaf▲92

    Gesture based brainstorming

    2015 · getlooseleaf.com · its alternatives →

16. 16
    Matter▲127

    An expanding UI Kit for Sketch

    2014 · its alternatives →

17. 17
    Prott▲89

    Rapid Prototyping for Mobile Apps

    2014 · prottapp.com · its alternatives →

18. 18
    PencilCase▲74

    An iPhone and iPad app maker and private publishing platform

    2014 · robotsandpencils.com · its alternatives →

19. 19
    Happy Startup Canvas▲85

    A simple framework for building stuff that matters

    2016 · thehappystartupschool.com · its alternatives →

20. 20
    Light-Bot▲84

    Programming Apps Teaching the Basics of Code

    2015 · lightbot.com · its alternatives →

21. 21
    Atom▲145

    A hackable text editor for the 21st Century

    2014 · github.blog · its alternatives →

22. 22
    Prototyp▲115

    Free tool based on Framer.js to create awesome interactions

    2016 · bcgame-hindi.in.net · its alternatives →

23. 23
    Composé▲91

    An editor for creating interactive iOS prototypes and apps

    2015 · its alternatives →

24. 24
    CanvasFlip▲20

    Uber Fast Prototyping Tool for Mobile Apps

    2015 · canvasflip.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →