Stack Overflow is the world's largest online community for developers and technologists, founded in 2008 by Jeff Atwood and Joel Spolsky. The flagship Q&A site (stackoverflow.com) serves more than 100 million users monthly seeking answers to programming questions, and anchors the broader Stack Exchange network of 170+ Q&A communities. The company also operates Stack Overflow for Teams, a private, cloud-based knowledge-sharing SaaS product that helps enterprises capture and reuse internal expertise. Headquartered in New York City, Stack Overflow was acquired by Prosus N.V. in 2021 for approximately $1.8 billion.
Stack Exchange has been acquired
This company is no longer available on our private secondary market.
Company data and valuation marks are estimates and may be incomplete, stale, erroneous, or revised.
Founded
2008
Employees
501–1,000
Total Funding
$153M
3 rounds
Total raised $153M across 3 rounds
Funding data and valuation marks are estimates and may be incomplete, stale, erroneous, or revised.
Last updated 06-25-2026
Latest Round
Type
Series E
Date
July 28, 2020
Amount
$85M
Valuation
—
Lead Investors
| Date | Round | Amount Raised | Valuation | Lead Investors |
|---|---|---|---|---|
| July 28, 2020 | Series E | $85M | — | GIC |
| March 8, 2011 | Series B | — | — | Spark Capital |
| May 4, 2010 | Series A | $6M | — | Union Square Ventures |
Prashanth Chandrasekar
Chief Executive Officer
Competitor list is illustrative and may be incomplete, stale, or erroneous.
GitHub
Microsoft-owned code hosting and developer collaboration platform whose Discussions feature competes with Stack Overflow for developer Q&A.
Public social platform whose programming and learnprogramming subreddits provide an open community alternative for developer Q&A and discussion.
Quora
General-purpose Q&A platform with a developer audience answering technical questions, competing on breadth rather than depth.
DEV Community
Open community platform (dev.to) where developers share articles, ask questions, and discuss programming topics.
Hashnode
Developer blogging community offering technical articles, tutorials, and discussion threads as an alternative knowledge source.
GitHub Copilot / ChatGPT
AI coding assistants increasingly used by developers to answer programming questions in-IDE, displacing traditional Q&A search traffic.
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