Substack
A subscription-based publishing platform for independent writers, journalists, podcasters, and other creators.
Last updated October 14, 2026
AI crawler reads
4requests
1companies- Anthropic4
- Profile
- 2
- Controversies
- 2
- JSON · MD
- 0
- First read
- Nov 4, 2026
- Latest read
- Nov 4, 2026
From this site's server log
Overview
Substack is an American online publishing and creator-monetization platform founded in 2017 by Chris Best, Hamish McKenzie, and Jairaj Sethi. It provides infrastructure for creators to publish newsletters, articles, podcasts, video, livestreams, and subscriber discussions while retaining a direct relationship with their audiences. Creators can offer free material, paid subscriptions, or a mixture of the two, with Substack generally taking a percentage of subscription revenue rather than relying primarily on advertising. The company emerged from a broader shift in digital media toward direct, recurring relationships between writers and readers. Its founders cited subscription publications such as Ben Thompson’s Stratechery as an important inspiration. In contrast with traditional publishers, Substack allows an individual writer or small editorial team to launch a publication without building a bespoke website, payment system, mailing infrastructure, analytics stack, or subscriber-management system. A publication can have a public web presence while also delivering posts directly by email, helping creators maintain access to their audiences outside algorithmically controlled social networks. Substack initially focused on email newsletters and written publishing. It expanded into podcast monetization in 2019, then added discussion threads, a dedicated Reader application, video tools, group chat, short-form Notes posts, livestreaming, and broader creator features. These additions moved the brand from being primarily a newsletter service toward a more general publishing and community platform. The company has also pursued partnerships and programs intended to attract professional journalists, comic creators, podcasters, and video makers. Substack Defender offers legal support to eligible writers, while earlier initiatives such as Substack Pro provided selected writers with advances or other financial support. The platform became especially visible during the decline of traditional newsroom employment and the disruption caused by the COVID-19 pandemic. Journalists, analysts, authors, commentators, and specialist publishers used Substack to launch independent publications and monetize niche audiences. Prominent users have included writers and journalists such as Glenn Greenwald, Paul Krugman, Seymour Hersh, Anne Helen Petersen, Robert Christgau, and Alison Roman. Some publications have generated substantial subscription revenue, contributing to Substack’s image as an alternative economic model for media professionals. Substack’s positioning has also produced controversy. The company has generally favored comparatively light content moderation, arguing that broad restrictions can suppress legitimate opinion and independent publishing. Critics have accused it of hosting health misinformation, extremist material, white-nationalist and antisemitic content, and other harmful publications. In 2023, some prominent creators publicly threatened to leave or left the platform over its handling of extremist content. The company has also experienced privacy and security incidents, including an accidental disclosure of subscriber email addresses in 2020. These disputes have made editorial policy, creator responsibility, and platform governance central parts of Substack’s public identity. Substack remains a privately held technology and media company headquartered in San Francisco. Its business model is based principally on subscription transactions and creator services. The platform reported more than 500,000 paying subscribers in 2021, four million paid subscriptions by late 2024, and five million paid subscriptions in March 2025. In 2025, reporting indicated that the company raised funding at a valuation of approximately $1.1 billion, although private-company financial information should be treated as reported rather than continuously verified. Substack’s continuing strategic direction has involved adding social discovery, video, live programming, and potentially advertising while preserving its core promise of direct creator-to-subscriber publishing.
History
Substack was established in 2017 by Chris Best, Hamish McKenzie, and Jairaj Sethi. Best had co-founded the messaging company Kik Messenger, Sethi had worked there as a platform lead and principal developer, and McKenzie had worked as a technology journalist. The founders developed Substack around the idea that writers could build sustainable businesses through direct paid relationships with readers. They regarded subscription publications such as Stratechery as evidence that specialist writing could support a commercial audience without depending entirely on advertising or a traditional publisher. The first phase of Substack’s development concentrated on newsletters. The company approached a small group of writers and supplied publishing, email delivery, payment processing, and basic audience tools. Writers could make their publications free, paid, or partly accessible to non-subscribers. Bill Bishop’s Sinocism was among the early notable publications, while the platform later attracted journalists, commentators, analysts, authors, and specialist publishers. Substack generally retained a percentage of subscription revenue, creating an incentive for the company to increase the number and value of paid publications. In 2018, the company raised seed funding from investors including The Chernin Group, Zhen Fund, Twitch chief executive Emmett Shear, and Zynga co-founder Justin Waldron. Andreessen Horowitz led a reported $15.3 million Series A in 2019. Substack used funding and creator-support programs to recruit writers and expand its infrastructure. It also began supporting podcast monetization in 2019 and added discussion threads, making the service more interactive than a conventional email-delivery product. The platform grew during a period of structural stress in journalism. Declining newsroom employment, the weakening of specialist publications, and the economic disruption of the COVID-19 pandemic encouraged writers to seek direct relationships with readers. Substack became particularly prominent among journalists and sports writers, although its founders stated that they were selective about recruiting in areas where it competed directly with established subscription publishers. In 2020, the company provided grants to more than 40 writers and offered other forms of financial assistance. In 2021, it expanded into comics and signed creators while experimenting with advances and revenue-sharing arrangements through Substack Pro. Substack Pro ended in 2022 after criticism concerning the limited disclosure of participating writers. Substack broadened its product scope in the early 2020s. It introduced a Reader application for iOS in 2022 and an Android version later that year. It began testing video in early 2022 and launched Substack Chat in November, allowing creators to organize private group conversations with subscribers. In April 2023, it launched Notes, a short-form social publishing feature. Notes was widely interpreted as an attempt to offer creators an alternative to social platforms, particularly after changes at Twitter under Elon Musk. Musk criticized the feature, and Twitter temporarily restricted or disrupted Substack links. Video became a larger strategic focus in 2023 and 2024. Substack released creation and editing tools, added video to Notes, introduced livestreaming, and partnered with Spotify to support podcast distribution. It also announced Creator Studio, a development initiative aimed at attracting TikTok creators, and added short video capabilities to chat. These moves reflected a shift from a newsletter company toward a multi-format creator platform spanning written work, audio, video, live events, messaging, and social discovery. Content governance has remained a defining controversy. Substack has favored a comparatively permissive moderation model, with rules addressing matters such as harassment, threats, spam, pornography, and calls for violence. Critics have argued that this approach permits health misinformation and extremist propaganda to flourish. The Center for Countering Digital Hate criticized the company’s handling of anti-vaccine content in 2022. In 2023, a group of creators objected to the presence of white-nationalist, Nazi, and antisemitic material; some left the platform or threatened to do so. Co-founder Hamish McKenzie defended the company’s limited-censorship philosophy, arguing that removing controversial viewpoints could create greater problems. Privacy and security have also affected the brand. In July 2020, Substack accidentally exposed email addresses by using a visible copy field in a policy-update message. The company acknowledged the incident. The platform has continued to expand legal and safety support for creators through Substack Defender, which offers legal review and assistance with disputes for eligible writers. By late 2024 and early 2025, Substack reported several million paid subscriptions, demonstrating the scale of its subscription infrastructure. The company remained privately held while pursuing additional investment and continued development of video, livestreaming, social features, and television distribution.
- 2025
Five million paid subscriptions reported
[1]Substack announces that its platform has reached five million paid subscriptions.
- 2024
Expansion into video and livestreaming
[1]Substack adds livestreaming and expands video capabilities while partnering with Spotify on podcast distribution.
- 2023
Substack Notes launches
[1]The company adds a short-form social publishing layer called Notes.
- 2022
Reader, video testing, and Substack Chat
[1]Substack launches Reader applications, begins private video testing, and introduces subscriber group chat.
- 2021
Expansion into comics and acquisition of People & Company
[1]Substack expands its creator programs into comics and acquires Brooklyn-based startup People & Company.
- 2019
Podcast support and Series A financing
[1]The platform adds podcast monetization and discussion features and receives reported Series A funding led by Andreessen Horowitz.
- 2018
Seed financing and early creator recruitment
[1]Substack raises seed funding and begins building its initial network of writers and paid publications.
- 2017
Substack is founded
[1]Chris Best, Hamish McKenzie, and Jairaj Sethi establish Substack as a platform for subscription-based publishing.
Products and positioning
A direct-to-audience publishing and subscription infrastructure platform that gives independent creators tools to publish, build communities, and earn recurring revenue.
Digital publishing · 2017
Substack Newsletter Publishing
The core Substack service lets an individual creator or publication publish posts on the web and deliver them by email. Publications may be free, paid, or mixed, with creators controlling access to individual posts and subscription tiers. Substack supplies hosting, payment processing, subscriber management, analytics, and email delivery, reducing the technical requirements for launching an independent publication.
Podcasting · 2019
Substack Podcasts
Podcast support allows creators to publish audio programs and offer them through free or paid subscriptions. The product extended Substack’s direct-to-audience model beyond written newsletters. Subsequent distribution and editing partnerships were intended to make the platform more useful for professional and independent podcasters.
Social publishing · 2023
Substack Notes
Notes is a short-form publishing and discovery feature that allows users to post brief material and repost content. It gives writers a way to communicate between longer newsletter installments and provides a social layer for discovering publications and creators.
Community and messaging · 2022
Substack Chat
Substack Chat enables creators to establish group conversations with subscribers. It is designed to make paid publications more community-oriented by adding a direct discussion environment alongside posts, email, audio, and video.
Reader application · 2022
Substack Reader
Reader is Substack’s mobile reading application for following publications and consuming subscribed content in a dedicated interface. Its launch gave subscribers an alternative to reading newsletters only through email or a web browser.
Creator support
Substack Defender
Substack Defender provides eligible writers with legal information, pre-publication review, and assistance involving disputes such as cease-and-desist demands. The program is intended to reduce legal barriers for independent journalism and commentary.
Controversies
2023
Dispute over extremist and hateful content
Substack faced criticism after writers and advocacy groups objected to white-nationalist, Nazi, and antisemitic publications on the platform. Several creators threatened to leave or departed, while co-founder Hamish McKenzie defended the company’s permissive moderation philosophy.
2022
Criticism over anti-vaccine content
The Center for Countering Digital Hate criticized Substack for allowing anti-vaccine writers to monetize content that it considered harmful to public health. Substack’s founders defended a minimal-censorship approach.
2021
Substack faces criticism over writer advances and content standards
Writers publishing via Substack criticized its practice of offering advances to selected writers, arguing that it makes the platform seem to make editorial decisions. Some writers announced they would leave the platform. Substack co-founder Hamish McKenzie defended the deals as business decisions rather than editorial ones, and the founders published further details about the program.
2020
Accidental exposure of subscriber email addresses
A policy-update email mistakenly used a visible copy field instead of a hidden one, exposing recipients’ email addresses to other users. Substack acknowledged the error.
Marketing campaigns
- 2021Substack Pro
Global
Substack experimented with a program that gave selected writers advances to establish publications, while allowing them to retain subscription revenue under the program’s arrangements.
Outcome. The program ended in 2022 after criticism about transparency regarding participating writers.
- 2020Pandemic-era writer grants
United States
During the early COVID-19 disruption, Substack provided grants of approximately $1,000 to $3,000 to more than 40 writers starting publications on the platform.
Outcome. Supported creator recruitment during a period of severe disruption in journalism and media.
- 2019Writer fellowship
United States
Substack offered selected writers a fellowship including a stipend and an in-person workshop, using financial and educational support to attract creators.
Outcome. Expanded the company’s creator-acquisition and support activity.
Brand decisions
2024
Broaden from newsletters into multimedia creator infrastructureStrategyBackground
Audience consumption was shifting toward audio, video, live programming, and social discovery.
Action taken
Substack expanded video, livestreaming, Notes, chat, and podcast distribution capabilities, including a Spotify partnership.
Aftermath
The company increasingly positioned itself as a multi-format creator platform rather than only an email newsletter service.
2023
Introduce Substack NotesProduct launchBackground
Substack wanted to improve discovery and give creators a social publishing format between long-form posts.
Action taken
The company launched Notes for short-form posts and reposts.
Aftermath
The feature was compared with Twitter and contributed to a public dispute with Twitter over links and platform competition.
- Twitter — Twitter criticized Notes and restricted or disrupted links to Substack.
2022
Launch Substack ChatProduct launchBackground
Substack aimed to make creator publications more community-oriented.
Action taken
The company introduced private group chats for creators and subscribers.
Aftermath
The platform expanded from publishing and email delivery into direct subscriber interaction.
2019
Add podcast monetizationProduct launchBackground
The company sought to extend its subscription model beyond written newsletters.
Action taken
Substack enabled creators to monetize podcasts through the platform.
Aftermath
Audio became one of the company’s principal expansion areas and later supported external distribution partnerships.
Recent events
Reported
Substack announces its iOS reading app[4]
Substack announced the launch of Substack Reader, an iOS app that brings users’ Substack subscriptions together for reading.
Reported
Substack acquires People & Company[5]
Substack announced that it had acquired Brooklyn-based community consulting startup People & Company; the team would work on community-building efforts and programs for writers in Substack’s network.
Reported
Substack faces criticism over writer advances and content standards[3]
Writers publishing via Substack criticized its practice of offering advances to selected writers, arguing that it makes the platform seem to make editorial decisions. Some writers announced they would leave the platform. Substack co-founder Hamish McKenzie defended the deals as business decisions rather than editorial ones, and the founders published further details about the program.
Reported
Substack launches Defender legal-support program[6]
Substack announced the launch of Defender, a service offering legal support to qualifying independent writers. After a closed pilot with a handful of writers, the program was opened to interested parties; users must be based in the U.S. and use Substack for professional work.
Sources7 sources
- 1Substacken.wikipedia.org
- 2Substack official websitesubstack.com
- 3Substack faces criticism over writer advances and content standardstechcrunch.com
- 4Substack宣布推出iOS阅读应用techcrunch.com
- 5Substack 收购 People & Companytechcrunch.com
- 6Substack 推出 Defender 法律支持计划techcrunch.com
- 7Substack launches an iOS app for reading newsletterstheverge.com
Cite this profile: Cite the canonical profile. /brand-wiki/substack · Editorial policy · How profiles are compiled