# Stack Overflow

> Stack Overflow is the public question-and-answer platform where more than 100 million developers a month go to solve coding problems, run by Stack Exchange, Inc. Founded in 2008 by Jeff Atwood and Joel Spolsky, it grew a library of roughly 83 million community-vetted questions and answers into the default reference for how the internet writes software. Owned by Prosus since a $1.8 billion acquisition in 2021, the company now sells that curated knowledge to enterprises through Stack Internal (formerly Stack Overflow for Teams), licenses its data to AI model builders, and runs a developer advertising business - while positioning its human-verified corpus as the trust layer for an AI-native era.

- **Founded:** 2008
- **Headquarters:** New York, New York, USA
- **Founders:** Jeff Atwood (Co-founder), Joel Spolsky (Co-founder (former CEO))
- **Team size:** Approximately 500-600 employees
- **Products:** Stack Overflow (public platform), Stack Internal (formerly Stack Overflow for Teams), Stack Ads (Reach & Relevance), Stack Data Licensing, OverflowAI
- **Notable:** Built one of the most-visited websites in the world, with 100M+ monthly visitors., Accumulated roughly 83 million community-vetted questions and answers., Knowledge reused an estimated 113 billion times.

## Products & services

- **Stack Overflow (public platform)** — The free public question-and-answer community where developers ask, answer, and vote on technical problems, backed by roughly 83 million questions and answers.
- **Stack Internal (formerly Stack Overflow for Teams)** — A private, SaaS knowledge-sharing and collaboration platform that gives organizations their own internal Stack Overflow to capture and reuse institutional knowledge. Used by 15,000+ companies.
- **Stack Ads (Reach & Relevance)** — Advertising and audience products that let brands reach Stack Overflow's global developer audience.
- **Stack Data Licensing** — Licensed access to Stack Overflow's curated, attributed knowledge base for training and grounding AI models and enterprise tools.
- **OverflowAI** — AI-powered features that surface verifiable, attributed answers from Stack Overflow's knowledge base rather than unsourced generated text.
- **Stack Exchange Network** — A network of 170+ community Q&A sites spanning topics from mathematics to home improvement.

## Achievements

- Built one of the most-visited websites in the world, with 100M+ monthly visitors.
- Accumulated roughly 83 million community-vetted questions and answers.
- Knowledge reused an estimated 113 billion times.
- Acquired by Prosus for $1.8 billion in 2021.
- Runs the annual Developer Survey, one of the largest and most-cited surveys of software developers, with ~49,000 respondents in 2025.
- Powers a network of 170+ Stack Exchange Q&A communities.

## Latest updates

- **2025-07** — The 2025 Developer Survey (~49,000 responses) reports AI adoption above 80% but trust in AI-generated answers falling to roughly 30%, down from ~40% the prior year.
- **2025-01** — Stack Overflow for Teams rebrands to Stack Internal, consolidating its enterprise knowledge products.
- **2024-05** — Announced data and API partnerships (including OpenAI and Google Cloud) to license its knowledge base to AI builders with attribution.
- **2023-07** — Introduced OverflowAI, bringing AI-assisted, attributed search to the public site and Teams.

## Links

- Website: https://stackoverflow.co
- LinkedIn: https://www.linkedin.com/company/stack-overflow/
- Twitter/X: https://x.com/stackoverflow
- GitHub: https://github.com/StackExchange
- YouTube: https://www.youtube.com/c/StackOverflowOfficial
- Instagram: https://www.instagram.com/thestackoverflow/
- Facebook: https://www.facebook.com/officialstackoverflow

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Profile page: https://yespress.io/stack-overflow
Published by YesPress — https://yespress.io
Last updated: 2026-08-08