Dev tools · alternatives · 2026

24 alternatives to Sumbli

Collaborative content

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Sumbli launched in 2018; newer entries below may have overtaken it.

1. 1
   Contentify▲70

   a real-time collaborative content manager on top of Github

   2014 · thyb.github.io · its alternatives →

2. 2
   Restyaboard▲197

   An open source alternative to Trello

   2015 · restya.com · its alternatives →

3. 3
   Flowhub▲85

   Let's Make Code More Playful (Beta Open)

   2014 · 12bet.review · its alternatives →

4. 4
   Fosshub▲79

   An open source for free and open source tools

   2015 · fosshub.com · its alternatives →

5. 5
   Total.js Messenger▲181

   A small, open-source alternative to Slack

   2017 · totaljs.com · its alternatives →

6. 6
   NimbusFoundry▲59

   Framework for building front-end collaborative apps

   2014 · nimbusfoundry.com · its alternatives →

7. 7
   Frankly▲101

   A dashboard of issues and PRs across GitHub repositories.

   2016 · github.com · its alternatives →

8. 8
   Developer Ipsum▲110

   Lorem for nerds

   2021 · developer-ipsum.netlify.app · its alternatives →

9. 9
   Monocle▲71

   HN-like Community for Tech and Startups (now open source)

   2013 · monocle.io · its alternatives →

10. 10
    Sitedrop▲83

    A visual way to collaborate using Dropbox

    2014 · its alternatives →

11. 11
    Wick Editor▲88

    The Internet's free and open-source creation suite

    2016 · wickeditor.com · its alternatives →

12. 12
    Jottings▲95

    Real-time collaboration in Markdown

    2016 · its alternatives →

13. 13
    Stackness▲92

    Show your stack! The social home for your dev tools

    Sep 2026 · stackness.dev · its alternatives →

14. 14
    Unhangout▲79

    An open source platform for running unconferences online

    2015 · its alternatives →

15. 15
    Addr▲98

    A collective and annotation-focus ePub reader

    2014 · its alternatives →

16. 16
    Max▲107

    A visual programming language for media

    2017 · cycling74.com · its alternatives →

17. 17
    Waffle▲84

    Your github workflow open sourced.

    2014 · its alternatives →

18. 18
    backstitch▲90

    A content curation platform for individuals and teams

    2015 · backstit.ch · its alternatives →

19. 19
    TextCraft▲66

    Slack as old-school MUD client

    2015 · textcraft.co · its alternatives →

20. 20
    Comet▲92

    openAPI editor for nerds

    2021 · its alternatives →

21. 21
    Opbeat▲75

    An ops collaboration platform for developers.

    2014 · its alternatives →

22. 22
    AVBL▲71

    Find a collaborator and bring your ideas to life.

    2014 · brandbucket.com · its alternatives →

23. 23
    ReadMe.io▲39

    A Developer Hub for your open source software

    2014 · readme.com · its alternatives →

24. 24
    Discourse▲43

    New open source discussion platform from Jeff Atwood.

    2014 · discourse.org · 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 →