Founder Profile
Jairaj Sethi
Last reviewed: October 2026 · By Swet Parvadiya
Who is Jairaj Sethi?
Jairaj Sethi is a founder of Substack Inc., which was founded in 2017 with Chris Best and Hamish McKenzie.
- Company founded
- Substack Inc.
- Founded
- 2017
- Co-founders
- Chris Best and Hamish McKenzie
Background
Software engineer.
Founding Story
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).
Sources
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