はてな is a Japanese internet company that operates a variety of online services, including a blog platform, a bookmarking service, and a Q&A forum.

Stack Overflow is the best Q&A platform for developers and is used by millions to learn and share technical knowledge.

Quora is the best Q&A platform for knowledge sharing and is used by millions seeking answers from experts and enthusiasts.

知乎 is the best knowledge sharing platform for Q&A and is used by users seeking high-quality answers and insights.

Stack Exchange is the best Q&A platform for knowledge sharing and is used by experts across various fields.

Q&A platform for Ubuntu users and developers

SegmentFault is a professional Chinese developer technical community offering Q&A, blogs, courses, and news for high-quality technical exchange.

Super User is a Q&A platform for computer enthusiasts and power users.

Ask.com is a Q&A website providing answers on various topics and is used by individuals seeking information.

Server Fault is a Q&A platform for system and network administrators.

Trusted place for answering life's questions

JustAnswer is an online Q&A platform that connects users with experts for receiving advice and sharing knowledge.

Question2Answer is a free open-source Q&A software platform for PHP/MySQL that helps communities share knowledge and attract search engine traffic.

TheConstructor is a community platform providing articles, guides, and Q&A focused on construction, civil engineering, materials testing, and building tips for industry professionals.

Lybrate is India's premier online patient consulting portal for booking doctor appointments, asking health queries, and consulting with 150,000+ doctors online.

teratail is a specialized Q&A site for IT engineers focusing on programming questions, errors, and solutions, helping users gain valuable knowledge.

Lawdragon is a legal media company providing free news, editorial features, lawyer guides, and marketing/branding services for law firms and attorneys.

IvyPanda is an academic assistance service providing 24/7 homework help, free essay examples, and online writing/research tools for students globally.

Studypool is an on-demand homework help service connecting students with verified tutors for Q&A and offering access to 40M+ study documents.

Codidact is a community-driven Q&A platform for various topics and is used by enthusiasts and professionals.

Sendsteps is an AI-powered presentation maker and interactive tool designed for educators to effortlessly create engaging lessons, quizzes, and live Q&A sessions for students.

CNode is a professional Chinese community forum dedicated to Node.js technology research, sharing, Q&A, and job postings for developers.

NGL is a new way to q&a; the app provides a safe space for users to connect with friends and be their authentic selves. NGL launched in November 2021 in Venice Beach, and has since helped more than 200 million users to connect and have fun.