Stack Overflow, part of Stack Exchange, is a free, community-driven, reputation-based Q & A site for computer programmers. No membership is required to ask questions or provide answers to questions by others.

Talkyard is described as 'Help each other — with the main features from StackOverflow, Discourse, Slack, Reddit, and Disqus' and is a Q&A service in the social & communications category. There are four alternatives to Talkyard for a variety of platforms, including Web-based, Self-Hosted, Python, Django and Android apps. The best Talkyard alternative is Stack Overflow. It's not free, so if you're looking for a free alternative, you could try Stack Overflow or Scoold.
Stack Overflow, part of Stack Exchange, is a free, community-driven, reputation-based Q & A site for computer programmers. No membership is required to ask questions or provide answers to questions by others.

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.




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.

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.
