Stack Overflow
Free
Stack Overflow is the largest online community for programmers to learn, share their knowledge, and advance their careers.
Stack Exchange
Free
Stack Exchange is a network of question-and-answer websites on topics in varied fields.
Steemit
Open Source
Steemit is a social news service which runs a blogging and social networking website on top of a blockchain database, known as Steem.
Server Fault
Free
Server Fault is a community QnA site about servers.
Reddit
Freemium
Reddit is an social news aggregation, web content rating, and discussion website.
Super User
Free
Super User is a Q&A sites for system admins.
Slant
Free
Slant Community’s guides to all the best stuff.
Yahoo! Answers
Free
Yahoo! Answers is a community-driven question-and-answer (Q&A) website.
Compare Quora with alternatives
Compare Stack Overflow and Quora and decide which is most suitable for you.
Compare Stack Exchange and Quora and decide which is most suitable for you.
Compare Yahoo! Answers and Quora and decide which is most suitable for you.