Alternatives

Products that do what A Subreddit for problems to solve does

1. 1RF
   RealProblemHunt – Find problems to solve▲122

   2015 · realproblemhunt.com

2. 2
   Probs▲78

   Free crowd-sourced problem solving

   2015

3. 3AH
   A HN/Reddit-style site for scientific pre-prints and publications▲275

   2018 · upvote.pub

4. 4MO
   Mathcha – Online Mathematics Editor▲358

   2017 · mathcha.io

5. 5
   List of Problems▲138

   See how makers are solving real problems

   2018

6. 6PO
   Problem of the Day▲5

   2014 · problemotd.com

7. 7
   Thinkerous▲85

   A community for sharing ideas that solve impactful issues

   2014

8. 8
   Codecrap▲93

   Where developers go to laugh and cry

   2014

9. 9DD
   Design, data-structure, algorithm problems and their solutions▲103

   2016 · github.com

10. 10NS
    New Sub-Reddit for Hardware Startups▲65

    2012 · reddit.com

11. 11
    Check a Site▲95

    Scan websites for over 700 quality problems

    2014

12. 12OS
    Open-source StackOverflow-like service▲74

    2016 · paizaqa.herokuapp.com

13. 13
    Disqus Channels▲92

    Sub-reddits for Disqus

    2015

14. 14NM
    No more “idea websites” – here's a problem solving website▲52

    2014 · thinkero.us

15. 15LT
    Listen to an NP-Complete Problem▲39

    2019 · github.com

16. 16SE
    Stack Exchange Engineering Blog▲7

    2015 · blog.stackexchange.com

17. 17SS
    Solve Something - an image-based solver for Draw Something▲18

    2012 · itunes.apple.com

18. 18MO
    my open source "reddit"-like community▲12

    2014 · whoaverse.com

19. 19MS
    Minimalist Stack Overflow▲8

    2020 · chrome.google.com

20. 20CG
    Code Golf – Solve problems in the least number of characters▲21

    2020 · code.golf

21. 21PH
    Problem Hunt – Discover a startup idea that actually solves a problem▲18

    2015 · probhunt.com

22. 22IM
    I made a small website about the Monty Hall Problem▲6

    I learned about the Monty Hall Problem recently. I thought it was so interesting it inspired me to make this small interactive website about it.

    2024 · evanconway.github.io

23. 23FA
    Forum as a service, for GitHub projects▲13

    2017 · gitq.com

24. 24IC
    I couldn't find an idea so I created a problem bank▲6

    After 6 months looking for an idea, procrastinating and over analyzing what I should build. I built a tool that allows people to find problems using custom plugins built with Grok and Claude.

    2025 · gotaprob.com

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