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Substack

Active#4 worldwide · Creator tools

Estimated valuation · Creator tools · United States

Newsletter and podcast publishing platform that lets writers and creators run paid subscriptions, with an app, recommendations network and video, taking a share of subscription revenue.

HQUnited States
Last roundSeries C · Jul 2025

Estimated valuation

AI · Creator tools ranking (worldwide)
≈ USD 1.1bnUSD 880M–1.4bn · Unicorn
Anchor
Last known equity round: Series C · USD 100M · Jul 2025
Published valuation
USD 1.1bn · Jul 2025

An indicative editorial estimate produced by AI, imperfect by nature: neither a financial valuation nor investment advice. Only the market sets a company’s value. Method

Uback rankings

How the AI ranks →
RankingTierRankEditionNext update
Creator tools · worldwideTop 43#4Edition 0 · Oct 202623 Apr 2027
Rank historyOct 2026 · #4 Creator toolsFirst edition: no movements yet.

Funding history

DateRoundAmountTypeInvestors
Jul 2025Series CUSD 100MEquityBOND, The Chernin Group, Andreessen Horowitz, Rich Paul, Jens Grede

Rounds as cited by Uback’s rankings. Equity, debt and grants are shown separately; only equity rounds count towards the valuation anchor.

Independent analyses

By industry professionals & analysts

Industry professionals and financial analysts can publish their own analysis of Substack as a PDF. It must answer at least one of these four questions, and stick to them:

AI valuation: $1.1BUndervalued or overvalued?
Versus competitorsHow does it compare?
Who should acquire itStrategic buyers, and why
Who should it acquireAcquisition targets, and why
Publish an analysisName, role and LinkedIn shown · public sources only

Analyses are the opinion of their authors, not of Uback. They are checked before publication.

Comparable companies in creator tools

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Last updated: Oct 2026Report an error

Uback is a content publisher and an aggregator of non-binding expressions of interest. It provides no investment advice, receives no mandate and takes part in no transaction. Rankings, ranges and brackets are editorial estimates produced by AI, purely indicative.