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Stack Exchange is a network of question-and-answer (Q&A) websites on topics in diverse fields, each site covering a specific topic, where questions, answers, and users are subject to a reputation award process. The reputation system allows the sites to be self-moderating. As of August 2019, the three most actively-viewed sites in the network are Stack Overflow, Super User, and Ask Ubuntu.
|Type of business||Private|
Type of site
|Question and answer|
|Headquarters||New York City, New York, U.S.|
|Owner||Stack Exchange Inc.|
|Created by||Jeff Atwood|
|Alexa rank||113 March 27, 2019[update]|
(relaunched in January 2011)
|User contributions under CC BY-SA 4.0|
All sites in the network are modeled after the initial site Stack Overflow, a Q&A site for computer programming questions created by Jeff Atwood and Joel Spolsky. Further Q&A sites in the network are established, defined and eventually – if found relevant – brought to creation by registered users through a special site named Area 51.
The websites claim that the user contributions are licensed under Creative Commons Attribution-ShareAlike 4.0 International, despite the Terms of Service up to September 2019 suggesting that they were providing Stack Exchange with another version of a CC BY-SA license.
Foundation and growthEdit
In 2008, Jeff Atwood and Joel Spolsky created Stack Overflow, a question-and-answer Web site for computer programming questions, which they described as an alternative to the programmer forum Experts-Exchange. In 2009, they started additional sites based on the Stack Overflow model: Server Fault for questions related to system administration and Super User for questions from computer power users.
In September 2009, Spolsky's company, Fog Creek Software, released a beta version of the Stack Exchange 1.0 platform as a way for third parties to create their own communities based on the software behind Stack Overflow, with monthly fees. This white label service was not successful, with few customers and slowly growing communities.
In May 2010, Stack Overflow (as its own new company) raised US$6 million in venture capital from Union Square Ventures and other investors, and it switched its focus to developing new sites for answering questions on specific subjects, Stack Exchange 2.0. Users vote on new site topics in a staging area called Area 51, where algorithms determine which suggested site topics have critical mass and should be created. In November 2010, Stack Exchange site topics in "beta testing" included physics, mathematics, and writing. Stack Exchange publicly launched in January 2011 with 33 Web sites; it had 27 employees and 1.5 million users at the time, and it included advertising. At that time, it was compared to Quora, founded in 2009, which similarly specializes in expert answers. Other competing sites include WikiAnswers and Yahoo! Answers.
In February 2011, Stack Overflow released an associated job board called Careers 2.0, charging fees to recruiters for access, which later re-branded to Stack Overflow Careers. In March 2011, Stack Overflow raised US$12 million in additional venture funding, and the company renamed itself to Stack Exchange, Inc. It is based in Manhattan, New York City. In February 2012, Atwood left the company.
On April 18, 2013 CipherCloud issued Digital Millennium Copyright Act (DMCA) takedown notices in an attempt to block discussion of possible weaknesses of their encryption algorithm. The Stack Exchange Crypto group discussion on the algorithm was censored, but it was later restored without pictures.
In 2016 Stack Exchange added a variety of new sites which pushed the boundaries of the typical question-and-answer site. For example, Puzzling offers a platform for users who already know the answer questions to challenge their peers to solve the problems unlike traditional Q–A sites where the poster does not know the answer.
Declining relationship between users and companyEdit
In 2016, Stack Exchange announced the Second Iteration of the Stack Exchange Quality Project, wherein they take attempt to implement specific important features requested by the community to meet a distinct high-priority set of goals. After the community enthusiastically responded with feature ideas, they complained that there was no sufficient action on the company's part.
In October 2018, the company removed a site[clarification needed] from the Hot Network Questions list after a complaint on Twitter, and employees[who?] posted tweets attacking moderators.
On September 2, 2019, the terms of services (and the footer of every page served) changed to referencing the "Creative Commons Attribution-ShareAlike" (CC BY-SA) license in its 4.0 version instead of the 3.0 version. Users were puzzled as to how Stack Overflow acquired the rights for this relicensing of their past contributions, with some users explicitly stating that they did not intend their contributions to be licensed under CC BY-SA 4.0 Would the relicensing be found to be a breach of CC BY-SA 3.0, users are concerned that Stack Exchange would have made itself unable to distribute the content under any CC BY-SA license (and that the footer's license statement could be erroneous), and would have to rely on its "perpetual and irrevocable right and license to use, copy, cache, publish, display, distribute, modify, create derivative works and store" the content instead. On September 27, an official Stack Exchange reply stated it had been an "important step", but declined to discuss with the community the legal basis for the relicensing.
On September 27, 2019, a moderator of multiple Stack Exchange sites was dismissed from her moderator position, allegedly connected to behavior associated with upcoming changes to the Code of Conduct (CoC) relating to gender pronouns. Many other moderators resigned or suspended moderator activity in response to the dismissal. The company responded with two very poorly received (downvoted nearly 2,000 times and deleted for the first, downvoted 1,500 times for the second) messages which have since been deleted, and by a slightly less negatively received apology (downvoted 1,100 times) several days later. On December 23, 2019, the company posted a message on their "Meta" site advising that they and the moderator had come to an agreement and expressing regret for any damage to her reputation. However, this and the more recent sudden and unexplained departure of key community moderators has led to a continuing erosion of trust between the community and the company, worsening the ongoing outflow of the site's most prolific users, moderators, and community managers.
The primary purpose of each Stack Exchange site is to enable users to post questions and answer them. Users can vote on both answers and questions, and through this process users earn reputation points, a form of gamification. This voting system was compared to Digg when the Stack Exchange platform was first released. Users receive privileges by collecting reputation points, ranging from the ability to vote and comment on questions and answers to the ability to moderate many aspects of the site. Due to the prominence of Stack Exchange profiles in web search results and the Stack Overflow Careers job board, users may have reason to game the system. Along with posting questions and answers, users can add comments to them and edit text written by others. Each Stack Exchange site has a "meta" section where users can settle disputes, in the style of MetaFilter's "MetaTalk" forum, because the self-moderation system for questions and answers can lead to significant arguments.
All user-generated content (questions and answers) posted on the Stack Exchange Network is copyright by the contributor and licensed to Stack Exchange under a Creative Commons Attribution Share Alike (CC-BY-SA) license.
Stack Exchange uses IIS, SQL Server, and the ASP.NET framework, all from a single code base for every Stack Exchange site (except Area 51, which runs off a fork of the Stack Overflow code base). Blogs formerly used WordPress, but they have been discontinued. The team also uses Redis, HAProxy and Elasticsearch.
Stack Exchange tries to stay up to date with the newest technologies from Microsoft, usually using the latest releases of any given framework. The code is primarily written in C# ASP.NET MVC using the Razor View Engine. The preferred IDE is Visual Studio and the data layers uses Dapper for data access.
Site creation processEdit
- Discussion: The Stack Exchange meta site should provide a forum for discussing potential new ideas labeled a future Stack Exchange site.
- Proposal: A public proposal must be drafted and posted so that any member of the community can discuss the proposal and vote on it. This allows a collaborative proposal to emerge over time. The proposal must address these four key issues:
- the topic of the site
- the targeted audience
- forty exemplary questions, upvoted at least 10 times from the community
- sixty followers from the community
- Commitment: 200 users interested in the new site are asked to formally commit and support the site by actively participating and contributing to it.
- Private Beta: If the concept receives 100% commitment, the site enters the private beta phase, where committed members begin actively using the site and publicizing it.
- Public Beta: The site is open to the public for a long period. This allows the creators to ensure that the site reaches critical mass before it is fully launched.
- Graduation: The site is evaluated on multiple criteria such as the number of answered questions, new questions per day, and registered users. If it meets these criteria and is deemed "sustainable", it is granted a "graduation" and fully launched.
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