Top Alternatives to Stack Exchange

Quora is a premier online platform transforming the way information is sought and shared. It serves as a dynamic question-and-answer hub where millions of users worldwide contribute their knowledge, experiences, and perspectives on countless topics.

Voat.co was a social networking and news aggregation platform designed to prioritize free speech and resist censorship, offering registered users a space to share content, participate in forums, and engage in discussions.

Steemit is a blockchain-based social networking platform that rewards users with cryptocurrency for posting, commenting, and curating content. It aims to be a decentralized alternative to traditional social media, empowering users and promoting censorship resistance.

Slant is a collaborative platform designed to help users discover and compare products, services, and software based on the collective intelligence of its community. It provides structured comparisons through pro-and-con lists and guides, making it easier for users to make informed decisions by leveraging crowdsourced opinions and data.

Question2Answer is a free and open-source platform designed for creating thriving online communities centered around asking and answering questions. It provides a robust framework for building knowledge bases and fostering interactive discussions.

AskBot is a robust, open-source question and answer forum software built on the Django/Python framework, designed to facilitate collaborative knowledge sharing within communities, teams, or organizations.

OSQA is a robust, open-source question and answer system designed to power community-driven knowledge sharing platforms. Built on Python and Django, it provides the tools needed to create Stack Overflow-style forums where users can ask, answer, and rate questions.

Yahoo! Answers served as a prominent online community-driven question-and-answer platform where users could ask questions on any topic and receive responses from a global community.