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Open Source Stack Overflow Alternatives

The best open source alternative to Stack Overflow is Codidact. If that doesn't suit you, our users have ranked more than 25 alternatives to Stack Overflow and 13 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Stack Overflow are Question2Answer, Scoold, TopAnswers and Talkyard.

Stack Overflow alternatives are mainly Q&A Services but may also be Social Networks or Team Collaboration Tools. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Stack Overflow.
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Stack Overflow, part of Stack Exchange, is a free, community-driven, reputation-based Q &...

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  1. Codidact icon

    Codidact

    12 alternatives to Codidact 

    Ever had a question? Ever had an answer? Ever had knowledge to share? We believe that coming together to inquire and learn, to share knowledge and to teach each other, makes the world a better place. We also believe that Q&A communities should be free from the politics and...

    Q&A category from Electrical Engineering
    Communities list (partial) at codidact.com
    Codidact vs Stack Overflow opinions
    pros, cons and recent comments
    cellio

    Codidact implements features that are impossible on Stack Overflow, based on what the community needs. The community is central on Codidact and the platform is open-source, so you can use Codidact's network or set up your own if you want to run things differently.

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    dataculi

    Other than Quora, it's like the only one on this list that actually plays the same role Stack Overflow plays. It's a reputation-based question and answer site (or collection of sites/communities) organized around a central topic

    Positive comment ago
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  2. Question2Answer icon

    Question2Answer

    • Mac
    • Windows
    • Linux
    • Online
    • MySQL Community Edition
    • Self-Hosted
    • PHP
    20 alternatives to Question2Answer 

    A Q&A site helps an online community to share knowledge. No matter what your area of interest, people with questions can get super answers fast. Question2Answer is a popular Q&A solution.

     Suggest and vote on features
    Features
    1.  LightweightQuestion2Answer consumes less device resources compared to similar apps.
    2.  WYSIWYG SupportQuestion2Answer integrates a WYSIWYG editor to edit the look and content of a document, page, or file.
    Screenshot
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    Question2Answer vs Stack Overflow opinions
    Most users think Question2Answer is a great alternative to Stack Overflow.
    Guest

    thats the best alternative... and you can freely install this system on your web

    Positive comment ago
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  3. Scoold icon

    Scoold

    • Online
    • Self-Hosted
    21 alternatives to Scoold 

    Scoold is inspired by StackOverflow and implements most of its features. You can ask and answer questions, upvote and downvote posts, earn badges and reputation. Each edit creates an new revision, making it easy to follow the history of edits. Scoold is optimized for the cloud.

     Suggest and vote on features
    Features
    1.  Support for @mentionsScoold supports the use of mentions through @ to a particular user, who will be notified personally.
    2.  Syntax HighlightingScoold supports syntax highlighting for various programming and markup languages.
    3.  Full-Text SearchScoold lets you search for specific words or phrases from inside a document or database.
    4.  LightweightScoold consumes less device resources compared to similar apps.
    5.  Dark ModeScoold supports dark mode for comfortable usage in low light conditions.
    Screenshot
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    Scoold vs Stack Overflow opinions
    Most users think Scoold is a great alternative to Stack Overflow.
    Guest

    you have to download it...

    Negative comment ago
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    0
  4. TopAnswers icon

    TopAnswers

    10 alternatives to TopAnswers 

    TopAnswers is what Stack Overflow should be: focused on communities and knowledge sharing, not profit. We share some of the same aims:

     Suggest and vote on features
    Features
    TopAnswers vs Stack Overflow opinions
    pros, cons and recent comments
    dataculi

    Similar to Codidact in that they directly aim to be an alternative to Stack Exchange. Unlike Codidact, it's mostly restricted to tech topics. Good alternative

    Positive comment ago
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  5. Talkyard icon

    Talkyard

    • Self-Hosted
    • Software as a Service (SaaS)
    4 alternatives to Talkyard 

    Help each other — with the main features from StackOverflow, Discourse, Slack, Reddit, and Disqus.

     Talkyard has no features, suggest some!


  6. Guora icon

    Guora

    55 alternatives to Guora 

    A self-hosted Quora like web application written in Go.

     Guora has no features, suggest some!
    Screenshot
  7. OSQA icon

    OSQA

    • Online
    • Self-Hosted
    • Python
    • Django
    17 alternatives to OSQA 

    OSQA is the free, open source Q&A system you've been waiting for. Your OSQA site is more than just an FAQ page, it is a full-featured Q&A community. Users earn points and badges for useful participation, and everyone in the community wins.

     OSQA has no features, suggest some!
    Discontinued

    The last commit to its open source code (https://github.com/dzone/osqa) is dated 2015. The official website URL (www.osqa.net) redirects to the proprietary product Answer-Hub (https://devada.com/answerhub/). www.osqa.net also happens to be in a blacklist used by the uMatrix browser extension.

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  8. AskBot icon

    AskBot

    • Online
    • Self-Hosted
    • Python
    • Django
    11 alternatives to AskBot 

    Askbot is a Q&A system, like StackOverflow, Yahoo Answers and some others. Askbot is based on code of CNPROG, originally created by Mike Chen and Sailing Cai and some code written for OSQA.

     AskBot has no features, suggest some!
    Discontinued

    The website is partially broken, no downloads, and a "We will re-open soon, please leave your email" since 2019.

    Screenshot
  9. Coordino

    • Linux
    • Online
    • Self-Hosted
    28 alternatives to Coordino 

    Coordino allows you to create a question and answer system for you and your users to enjoy.

     Coordino has no features, suggest some!
    Discontinued

    Repository hasn't been touched in 5 years

    Screenshot
  10. Solace

    • Mac
    • Windows
    • Linux
    • Online
    6 alternatives to Solace 

    Solace is a fully open-sourced multilingual support and knowledge exchange platform written in Python.

     Suggest and vote on features
    Features
    Discontinued

    Latest commit on Nov 29, 2009, see https://github.com/Plurk/Solace

Showing 10 of 13 alternatives
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