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Substack

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A place for independent writing. We make it simple for a writer to start a paid newsletter Media Publishing Consumer

About Substack

Substack builds in the media category and is tracked by 100Xfounder for operating momentum, talent growth, and market execution.

What they do: A place for independent writing. We make it simple for a writer to start a paid newsletter Media Publishing Consumer

Funding context: Andreessen Horowitz, $65M Series B in 2021, $650M valuation

Recent milestones:

Substack appears in the 100Xfounder startup directory import feed.

Why it Matters

Substack matters because a place for independent writing. We make it simple for a writer to start a paid newsletter Media Publishing Consumer

Funding Snapshot

Total Funding: $65.00MLast Round: Series B Andreessen Horowitz, $65M Series B in 2021, $650M valuationAll Rounds: 1

Series B | Andreessen Horowitz, $65M Series B in 2021, $650M valuation

Hiring Roles

This company is actively hiring.

Open Roles

Meet the Founders

Substack Team

Substack Team

Founder & CEO

Tech Stack

Node.jsReactKafkaSnowflake

Last updated: April 17, 2026

Substack intelligence brief

This profile combines core company context with linked founder, funding, and newsroom routes so readers can evaluate business momentum without switching across multiple tools. Use it as a baseline for comparing peers in the same industry and stage.

For deeper validation, pair this page with founder profile, company news coverage, and stage-based funding hubs to contextualize updates against wider market movement.

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Discover Now

Newsroom and topic pages connected to Substack.

Company News Hub Topic Hubs Funding News

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Contextual Research Links

Jump to country, industry, stage, startup taxonomy, and newsroom routes tied to this company.

Company profile→Company news hub→Founder profile→United States startup directory→United States startup news→Startups in United States→Media hub→Media startup list→Series B startups→Series B startup list→

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FAQs About Substack

Common questions people ask about this profile.

What is Substack?

A place for independent writing. We make it simple for a writer to start a paid newsletter Media Publishing Consumer

Who founded Substack?

Substack is associated with Substack Team on 100Xfounder.

Where is Substack located?

Substack is listed in San Francisco Bay Area, California, USA.

What stage is Substack in?

Substack is currently mapped to Series B. Funding context: Andreessen Horowitz, $65M Series B in 2021, $650M valuation

What is the latest funding round of Substack?

Substack's latest tracked round is Series B Andreessen Horowitz, $65M Series B in 2021, $650M valuation. Total tracked rounds: 1.

Is Substack hiring now?

Substack hiring status: Open Roles.

What technologies does Substack use?

Substack is associated with Node.js, React, Kafka, and Snowflake.

Is Substack verified on 100Xfounder?

Yes. Substack is currently marked verified on 100Xfounder as of April 17, 2026.

How can users connect with Substack founders?

Users can open founder profiles, use listed company links, and track signal updates directly from the 100Xfounder directory.