Stack Overflow
Platform · this deep dive is built from the official pages of the platform itself and of the tools that support it.
Overview
Stack Overflow is a question-and-answer site for developers and the core of the Stack Exchange network. The operator is Stack Exchange, Inc.; the product shop window sits on the stackoverflow.co domain, and the legal documents on policies.stackoverflow.co.
This deep dive has to start with a technical fact that determines everything else. On the date of our check the file stackoverflow.com/robots.txt contains four lines: a link to the licence, User-agent: *, the signal Content-signal: search=no, ai-train=no and Disallow: /. The same is served by meta.stackexchange.com and stackexchange.com — and with response code 418, meaning the request has already been recognised as automated. So the entire question-and-answer site, including the help centre with the rules on self-promotion, is closed to automated reading. We respect that rule and do not circumvent the protection, so everything set out below rests on the domains where reading is permitted: stackoverflow.co, policies.stackoverflow.co, survey.stackoverflow.co, api.stackexchange.com and stackoverflow.blog.
The company's three products are named on its own shop window: Stack Internal (formerly Stack Overflow for Teams) — a private knowledge base, Stack Data Licensing — data licensing, Stack Ads — advertising.
Who's here
The data licensing section reports more than 83 million questions and answers, more than 69,000 unique topics, 17-plus years of accumulation and one new question on average every 21 seconds; the same page mentions more than 150 Stack Exchange sites.
The advertising section gives audience figures: 183 unique communities, "millions" of average monthly unique visitors, 82% of developers visiting Stack Overflow several times a month and 62% influencing the decision to buy new technology. The company backs the last two numbers with a link to its own survey — that is its measurement on its own sample.
The survey itself is the most substantial public source on geography: the 2025 survey, the fifteenth, gathered more than 49,000 responses from 177 countries across 62 questions and 314 technologies. From the same place: 84% of respondents use AI tools in development or intend to, against 76% a year earlier; 47.1% use them daily. Remember: this is self-selection by survey participants, not a portrait of the whole audience.
The interface language of the main site is English.
Getting started
Registration on the site itself sits behind the same barrier. What is confirmed is that an account is needed to take part in discussion: comments under blog posts require signing in with a stackoverflow.com account.
For a developer the entry to programmatic access is described openly: an application must be registered on Stack Apps to obtain a request key or enable OAuth. For a company the path is different and paid — Stack Internal or an advertising contract.
What you can publish
The main site's format is questions and answers with comments, edits and votes. The help pages with the exact rules on the content of posts are on a domain closed to reading.
What is confirmed on the permitted sources is the licence. The robots.txt file links to a machine-readable licence description at stackoverflow.com/license.xml, and that is the only address on the main domain we opened — it is named by robots.txt itself. It states Creative Commons Attribution-ShareAlike 4.0 for all the site's content. The practical conclusion: your answer stays available for reuse with attribution and on the same terms.
The platform defines spam separately: «unwanted and unsolicited advertising or promotion that disrupts the question-and-answer experience» (a post of 15 January 2026).
How to grow
The self-promotion rules
Let us be honest about it. Stack Overflow's rules on self-promotion and on mandatory disclosure of affiliation (the requirement to state that you are connected to the product you are writing about) live in the help centre on stackoverflow.com, and that whole domain is closed by the Disallow: / directive. A guide cannot quote a document that cannot be opened, so those rules are not retold here.
What is officially confirmed is that the fight against spam is automated: if a new post closely resembles material recently deleted as spam, it is most likely spam too; the system is built on vector representations and cosine similarity, and the time spam stays on the platform has fallen by 50%. The conclusion for a marketer: bulk look-alike posts with links are cut off by the machine before a moderator ever sees them.
Advertising
The advertising product is Stack Ads. The formats: banner and native advertising, sponsorship of topic tags and sites, dedicated company pages and advertising on them, advertising in the podcast and sponsored episodes, advertising in the newsletter and sponsored blog posts.
The entry threshold is stated as a number, and it is high: an advertiser must spend a minimum of 15,000 dollars over one month or 10,000 dollars over three months. The same page restricts the type of advertiser: campaigns are run only with those who have a product or service a developer can use while writing code.
Delivery settings: targeting by topic tags; by geography — through Google Ad Manager using a truncated IP address; by industry and company size — by matching the IP against Dun & Bradstreet data; MOAT, Doubleverify and IAS counters are permitted for fraud control. Two prohibitions are formulated in the reader's favour: autoplay video formats are not allowed, and the platform undertakes not to circumvent ad blockers. The page is marked with an update date — 12 February 2024.
Path to monetization
Stack Overflow does not pay authors: no share of advertising revenue, no subscriptions and no payouts for answers are described on the pages permitted for reading. The platform's currency is reputation; in the feature list of the paid product it is called «a rough measure of trust, earned through trustworthy contribution».
The company itself earns, and it earns on the community's data: the whole Stack Overflow corpus or a selection from it is available under licence, real-time access is provided by the Stack Exchange API, and data extracts are also distributed through Snowflake and Databricks Marketplace. An author should know this: your answer is part of a commercial product.
The paid product for teams
Stack Internal is a private knowledge base on a per-seat model. The free plan covers up to 50 people; Basic is 6.50 dollars per seat a month, up to 250 people; Business has no limit on the number of people; Enterprise is by agreement.
What is included: in Basic — a structured knowledge base, read access through the API, single sign-on via SAML and Okta, integrations with Slack and Microsoft Teams, Content Health, Collections and Articles, AI search and an auto-answer, a full read-and-write API; in Business — priority support, usage metrics, SOC 2 Type II certification, the Microsoft Graph connector, integrations with GitHub and Backstage.io, rights to several teams; in Enterprise — ISO 27001/27701 and TISAX certifications, a separate hosting environment, unlimited private teams, the Ingestion mechanism. Add-ons are sold separately: a Premium API and an MCP server for reaching the knowledge base from AI assistants and coding agents. The service level is declared as 99.5% guaranteed availability, and the plans include read access to the content of stackoverflow.com directly from the internal base.
Tools and automation
The official interface is the Stack Exchange API v2.3 with support for authentication and writing. Confirmed by the documentation:
- applications are registered on Stack Apps; a request key and an access token raise the call quota;
- responses are always in JSON, JSONP is supported, all responses are compressed and wrapped in a common object;
- the page size is no more than 100, any
{ids}parameter no more than 100 items, and numbering starts at one; - for anonymous access without a token and key the maximum page number is 25;
- responses are heavily cached, and polling more often than once a minute for semantically identical requests is considered abuse;
- filters let you trim a response to the fields you need and request fields that are not normally returned;
- authorisation via OAuth 2.0; some methods and fields require the
private_infoorwrite_accessscopes; dates are in unix epoch format.
The legal terms of use for the API sit on the closed domain: the list of documents shows an item "Stack Exchange, Inc. API Terms of Use" with a link to stackoverflow.com/legal/api-terms-of-use.
We found no third-party scheduling services with confirmed Stack Overflow support — the platform is not designed for publishing on a schedule.
Limits and rules
- Reading by robots. All of
stackoverflow.comis closed by theDisallow: /directive with the signalsearch=no, ai-train=no; the same on meta.stackexchange.com and stackexchange.com. The product domain, by contrast, is open:Allow: /. - Spam. Filtered automatically before publication.
- Advertising. A minimum of 15,000 dollars for a month or 10,000 for three; developer products only; no autoplay video.
- API. A page of up to 100 items, a maximum of 25 pages without a key, polling no more than once a minute.
- Content licence. CC BY-SA 4.0 — declared in the machine-readable description that robots.txt itself links to.
- The community's data is commercialised. The corpus is licensed for training models.
Who it's for
It suits developers and technical teams for whom expert reputation matters: a good answer lives for years and is found through search. It suits companies with budgets in five figures and up — the threshold cuts off small business, but targeting by tags gives a very precise audience. It suits organisations that need an internal knowledge base: Stack Internal starts with a free plan for up to 50 people.
It does not suit you as a content marketing channel in the usual sense: the format is an answer to someone else's question, not a publication. It does not suit automation: the site is closed to robots. It does not suit authors looking for direct income: the platform does not pay, and licenses the data itself.
Verified data
The checked data this deep dive rests on.
About the platform
the platform describes itself like this: «Stack Overflow | The World’s Largest Online Community for Developers»
Self-description: this is the platform's claim about itself, not an independent assessment
source, checked 2026-07-28
Who's here
the company reports more than 83 million questions and answers
The company's statement in the data licensing section
source, checked 2026-07-28
the company reports more than 69,000 unique topics
The company's statement
source, checked 2026-07-28
the company reports that a new question appears on average every 21 seconds, and that the material has been accumulating for more than 17 years
The company's statement
source, checked 2026-07-28
the company reports more than 150 Stack Exchange sites
The company's statement
source, checked 2026-07-28
the advertising section reports: 82% of developers visit Stack Overflow several times a month, 62% influence the decision to buy new technology
The company backs both numbers with a link to its own survey — that is its measurement on its own sample
source, checked 2026-07-28
the company reports that the 2025 developer survey, the fifteenth, gathered more than 49,000 responses from 177 countries across 62 questions and 314 technologies
Self-selection by survey participants, not a portrait of the whole audience
source, checked 2026-07-28
according to the 2025 survey, 84% of respondents use AI tools in development or plan to (against 76% a year earlier), and 47.1% use them daily
The company's measurement on the survey sample
source, checked 2026-07-28
the advertising section names 183 unique communities and "millions" of average monthly unique visitors
The word "millions" is not expressed as a number; the page does not explain what exactly counts as a "community"
source, checked 2026-07-28
Advertising
an advertiser must spend a minimum of 15,000 dollars over one month or 10,000 dollars over three months · the source is dated 2024-02-12
The page is marked with an update date of 12 February 2024
source, checked 2026-07-28
campaigns are run only with advertisers who have a product or service a developer can use while writing code
source, checked 2026-07-28
targeting by topic tags; by geography — through Google Ad Manager using a truncated IP address; by industry and company size — by matching the IP against Dun & Bradstreet data; MOAT, Doubleverify and IAS counters are permitted for fraud control
source, checked 2026-07-28
autoplay video formats are not allowed; the platform undertakes not to circumvent ad blockers
source, checked 2026-07-28
Stack Ads formats: banner and native advertising, sponsorship of topic tags and sites, company pages and advertising on them, advertising in the podcast and sponsored episodes, advertising in the newsletter, sponsored blog posts
source, checked 2026-07-28
How the money works here
the company licenses the community's corpus: the whole corpus or a selection is available under licence, real-time access is given by the Stack Exchange API, and extracts are distributed through Snowflake and Databricks Marketplace
The community's material is a commercial product of the company
source, checked 2026-07-28
Paid subscriptions
Basic includes a structured knowledge base, read access through the API, single sign-on via SAML and Okta, integrations with Slack and Microsoft Teams, Content Health, Collections and Articles, AI search and an auto-answer, a full read-and-write API; Business — priority support, usage metrics, SOC 2 Type II, the Microsoft Graph connector, integrations with GitHub and Backstage.io; Enterprise — ISO 27001/27701 and TISAX, a separate hosting environment, unlimited private teams, Ingestion
The Premium API and MCP server add-ons are sold separately
source, checked 2026-07-28
Pricing
Stack Internal plans (formerly Stack Overflow for Teams): Free — up to 50 people; Basic — 6.50 dollars per seat a month, up to 250 people; Business — no limit on the number of people; Enterprise — by agreement
A rate is named only for Basic; the other plans say "Get started" and "Talk to sales"
source, checked 2026-07-28
Limits and restrictions
the Stack Internal service level is declared as 99.5% guaranteed availability
source, checked 2026-07-28
the page size is no more than 100, any {ids} parameter no more than 100 items, and numbering starts at one
source, checked 2026-07-28
for anonymous access without a token and key the maximum page number is 25
source, checked 2026-07-28
polling more often than once a minute for semantically identical requests is considered abuse
Responses are heavily cached
source, checked 2026-07-28
Restrictions
robots.txt closes the whole site to automated reading: User-agent: * , Content-signal: search=no, ai-train=no , Disallow: /
The request was served with code 418, meaning it had already been recognised as automated. We respect the rule: we did not open the site's pages
source, checked 2026-07-28
the same Disallow: / rule is served by meta.stackexchange.com and stackexchange.com
Checked separately on each domain; both answered with code 418
source, checked 2026-07-28
the product domain stackoverflow.co, by contrast, is open: User-Agent: * , Allow: /
That is precisely why the article rests on stackoverflow.co, policies.stackoverflow.co, survey.stackoverflow.co, api.stackexchange.com and stackoverflow.blog
source, checked 2026-07-28
the company defines spam as "unwanted and unsolicited advertising or promotion that disrupts the question-and-answer experience"; the filter compares a new post with recently deleted ones and has cut the lifetime of spam on the platform by 50% · the source is dated 2026-01-15
A corporate blog post of 15 January 2026
source, checked 2026-07-28
Legal
robots.txt links to a machine-readable licence description, which states Creative Commons Attribution-ShareAlike 4.0 for all the site's content
The only address on the main domain we accessed besides robots.txt is named by robots.txt itself
source, checked 2026-07-28
the index of legal documents is kept on policies.stackoverflow.co; the texts of the Public Network Terms of Service, the Acceptable Use Policy and the API Terms of Use lie on stackoverflow.com and are unavailable to us
The existence of the documents is confirmed, their content is not
source, checked 2026-07-28
API access
the official interface is the Stack Exchange API v2.3 with support for authentication and writing; applications are registered on Stack Apps
Authorisation via OAuth 2.0; some methods require the private_info or write_access scopes
source, checked 2026-07-28
Languages
the interface language of the home page: en
The language is taken from the markup attribute, the versions from hreflang
source, checked 2026-07-28
Catalogue section: all similar See also: catalogue index · region: USA and Canada · scheduler comparison · find by situation · platform restrictions