Jairaj Sethi Net Worth (Estimated)

Who is Jairaj Sethi?

Jairaj Sethi is a founder at Substack, having participated in the Y Combinator Winter 2018 batch.

Highlights:

• Y Combinator W18
• Substack

About Substack

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Model inputs

• Stage: series-c
• Valuation tier: reported-valuation
• Funding input: reported raise $100.0M
• Current valuation input: $1.1B
• Valuation note: YC W18 substack.com. Leftover $100M C at $1.1B matches Reuters + company blog.
• Research as-of: 2026-09-14
• Funding source: https://www.reuters.com/business/media-telecom/newsletter-platform-substack-valued-11-billion-latest-funding-round-2025-07-17/

FAQ: Jairaj Sethi net worth and Substack valuation

What is Jairaj Sethi's net worth?

Jairaj Sethi's estimated net worth / paper wealth is $28.9M (range $20.2M–$43.3M) as of 2026. Entrepreneurial Check publishes an independent model-based estimate from public company and role data.

Jairaj Sethi net worth

Jairaj Sethi's estimated net worth / paper wealth is $28.9M (range $20.2M–$43.3M) as of 2026. This Jairaj Sethi net worth figure is estimated paper wealth, not a verified statement of assets.

How much is Jairaj Sethi worth?

Jairaj Sethi's estimated net worth / paper wealth is $28.9M (range $20.2M–$43.3M) as of 2026. How much Jairaj Sethi is worth here means estimated paper wealth from public company and role data — not financial advice.

How rich is Jairaj Sethi?

Jairaj Sethi's estimated net worth / paper wealth is $28.9M (range $20.2M–$43.3M) as of 2026. “How rich is Jairaj Sethi” here means estimated paper wealth from public company and role data — not verified net worth or financial advice.

Jairaj Sethi fortune

Jairaj Sethi's estimated net worth / paper wealth is $28.9M (range $20.2M–$43.3M) as of 2026. This Jairaj Sethi fortune figure is estimated paper wealth only, not a verified statement of assets.

Jairaj Sethi equity value

Jairaj Sethi's estimated net worth / paper wealth is $28.9M (range $20.2M–$43.3M) as of 2026. Jairaj Sethi equity value on this page is modeled paper wealth from estimated ownership — not a disclosed cap table or verified net worth.

What is Substack valuation?

Substack's estimated valuation on Entrepreneurial Check is $1.1B. Independent model output, not a verified appraisal or official mark.

What is Substack post-money valuation?

Substack's estimated valuation on Entrepreneurial Check is $1.1B. That figure is a modeled post-money mark when a public raise is available — not a verified appraisal or official mark.

What is Substack funding?

Substack funding, when a public raise is available, is a model input on this Entrepreneurial Check profile. How much Substack raised is not a complete cap table — figures are estimates only.

How much did Substack raise?

How much Substack raised, when disclosed, informs the estimated Substack valuation and founder paper-wealth figures on this page. Independent estimate only — not a complete cap table or financial advice.

How much money did Substack raise?

How much money Substack raised, when a public figure is available, is a model input for the estimated Substack valuation on this profile. Estimates only — not a complete cap table.

What is Substack series funding?

Substack series funding, when a public raise is disclosed, informs the estimated Substack valuation here. Not a complete financing history.

What company is Jairaj Sethi building?

Jairaj Sethi is Founder at Substack, a Y Combinator-backed startup (batch W18).

What does Substack do?

Substack — A place for independent writing.

What YC batch is Jairaj Sethi from?

Jairaj Sethi is associated with Y Combinator batch W18.

Where is Jairaj Sethi based?

Public directory data lists Jairaj Sethi's region as United States of America.

What industry is Jairaj Sethi in?

Jairaj Sethi is listed under B2B, Marketing.

How big is Substack?

Public data lists Substack's team size as 90.

What else is notable about Jairaj Sethi?

Y Combinator W18.

Is Entrepreneurial Check affiliated with Y Combinator?

No. Entrepreneurial Check is an independent informational site and is not affiliated with, endorsed by, or sponsored by Y Combinator or the profiled companies.