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Substack Inc.

Independent Publishing PlatformFounded 2017
Reviewed by Swet Parvadiya
Company data updated: October 2026

Founders

Who Founded Substack?

Chris Best, Hamish McKenzie, Jairaj Sethi · Founded 2017 · HQ today: San Francisco, California, United States

Who founded Substack?

Substack was founded by Chris Best, Hamish McKenzie, Jairaj Sethi in 2017. It is now led by Chris Best.

Founders
Chris Best, Hamish McKenzie, Jairaj Sethi
Founded
2017
Headquarters
San Francisco, California, United States
Number of founders
3
Current CEO
Chris Best (since 2017)
Where was Substack founded?
Substack was founded in San Francisco, California, United States in 2017.
When was Substack founded?
Substack was founded in 2017.
Who started Substack?
Substack was founded by Chris Best, Hamish McKenzie and Jairaj Sethi.
How old is Substack?
Substack is 9 years old as of 2026.

Founding Story

Chris Best, a Kik co-founder, and journalist Hamish McKenzie started Substack in 2017 with Kik engineer Jairaj Sethi, aiming to give writers a business model that did not depend on advertising. China analyst Bill Bishop's Sinocism newsletter was the first paid publication on the platform, and Substack joined Y Combinator's Winter 2018 batch.

Background

Chris Best studied at the University of Waterloo and co-founded Kik Interactive, the Canadian messaging app company, where he served as CTO before starting Substack.

Role at Substack Inc.

Chris Best is the co-founder and CEO of Substack. Before Substack he co-founded Kik. He has led the company through its Series A (2019), Series B (2021), 2023 community round and $100 million Series C (2025), and has publicly defended Substack's hands-off approach to content moderation. (Exact birth year remains publicly undisclosed).

Background

New Zealand journalist and author.

Role at Substack Inc.

Hamish McKenzie co-founded Substack in 2017. A former tech journalist (and early Tesla employee), he was deeply frustrated by the catastrophic collapse of the traditional media business model, which relied entirely on highly toxic, clickbait advertising. He helped conceive Substack's absolute core thesis: allowing writers to monetize their most loyal readers directly through subscriptions. Hamish McKenzie was born in 1981.

Background

Software engineer.

Role at Substack Inc.

Jairaj Sethi co-founded Substack in 2017. As the absolute critical technical architect (and former lead developer at Kik Messenger), he built the incredibly robust underlying email and payment infrastructure required to reliably deliver millions of newsletters and securely process massive volumes of Stripe subscription payments without failure. (Exact birth year remains publicly undisclosed).

Substack Inc.: CEO & Leadership History

Full timeline →

Chris Best

Co-Founder and Chief Executive Officer

2017 – Present

As Co-Founder and CEO, he acts as the absolute driving force behind the platform's fierce, uncompromising defense of free speech, despite massive internal and external backlash.

Hamish McKenzie

Co-Founder and Chief Writing Officer

2017 – Present

As Co-Founder and Chief Writing Officer, he directly recruits massive literary talent and heavily shapes the company's deeply philosophical stance on the future of independent media.

Jairaj Sethi

Co-Founder and Chief Technology Officer

2017 – Present

As Co-Founder and CTO, he ensures the platform remains incredibly fast, reliable, and deeply integrated with Stripe for seamless creator payouts.

Compare Substack Inc. Leadership With Competitors

Keep researching Substack

Who Founded Substack? FAQ

Who are the three founders of Substack and how did they meet?

Substack was founded by Chris Best, Hamish McKenzie, and Jairaj Sethi. The three met while working at mobile messaging startup Kik Interactive in Waterloo, Ontario, and San Francisco: Best was co-founder and CTO, Sethi was lead platform engineer, and McKenzie was head of communications.

What was Chris Best's life before founding Substack?

Chris Best was born in Canada and studied systems design engineering at the University of Waterloo. He co-founded Kik Interactive in 2009, helping scale the messaging app to hundreds of millions of users before resigning in 2017 to solve the broader crisis in media and public discourse.

What was Hamish McKenzie's background as a journalist?

Hamish McKenzie grew up in Christchurch, New Zealand, and studied English literature and journalism. He worked as an investigative reporter in New Zealand and Hong Kong, covered the Silicon Valley startup boom for tech blog PandoDaily, wrote a book on Tesla, and saw firsthand how pageview metrics degraded journalistic integrity.

What was Jairaj Sethi's role in building the early platform?

Jairaj Sethi was the technical builder who wrote the original Substack code. Sethi designed the ultra-clean publishing editor, the one-click subscriber database, and the seamless integration with Stripe Connect that made publishing and billing effortless for writers.

What was the central argument in Chris Best's founding essay "A Better Future for the News"?

Best argued that the business model of internet journalism was fundamentally broken: "If you get paid for clicks, you will optimize for outrage. If you want a better internet, you have to change who pays. When readers pay writers directly, writers optimize for quality and trust."

How did the founders convince Bill Bishop to be their first guinea pig?

Hamish McKenzie reached out to Bill Bishop, author of the popular free Sinocism newsletter. The founders flew to Washington, D.C., sat down with Bishop, and promised that if he launched a paid tier on their prototype, they would handle all billing, customer support, and technology. Bishop agreed, and the launch was an instant triumph.

How did the founders get into Y Combinator?

With the early traction from Sinocism and a handful of other writers, the founders applied to Y Combinator and were accepted into the Winter 2018 (W18) batch, gaining mentorship from startup leaders and securing their initial $2 million seed funding round.

What personal risks did the founders take to launch Substack?

The founders left lucrative, comfortable corporate tech careers to build an unproven subscription platform at a time when most venture capitalists believed that "nobody pays for content on the internet anymore."

How did the founders' contrasting personalities complement each other?

Chris Best brought long-term architectural vision and corporate engineering rigor; Hamish McKenzie brought deep journalistic empathy, storytelling flair, and relationships with the media industry; and Jairaj Sethi brought relentless execution speed and product minimalism.

Why did the founders insist on refusing advertising on Substack?

The founders believed that introducing banner ads or programmatic sponsors would immediately corrupt the product: engineering would focus on tracking ad clicks rather than reader experience, and writers would feel pressure from brand advertisers.

What is the founders' stance on the future of traditional newsrooms?

The founders do not view Substack as an enemy of traditional newsrooms, but as an alternative ecosystem where individual beat reporters, independent commentators, and niche analysts can make a better living while retaining full ownership of their work.

What is the lasting legacy of the Substack founders in digital media?

Best, McKenzie, and Sethi sparked the modern subscription newsletter revolution, empowering thousands of independent writers worldwide to earn a dignified living and transforming media consumption from passive algorithmic feeds to active patronage.

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Content is for informational purposes only. Not financial advice. Data sourced from SEC filings, annual reports, and public records. See our full disclaimer and methodology.