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Substack
Consumer Services · San Francisco, United States · Founded 2017
Ownership
Who owns Substack
Estimated cap table from Dealroom's shareholder data — share of equity by holder. Stakes as last recorded by Dealroom (2026). Percentages are indicative.
Some investors are hidden on this public profile. See the full cap table on Dealroom →
Substack mafia
Startups founded by Substack alumni
Former Substack employees who went on to start their own companies. Sorted by Dealroom signal score.
Salim AfsharUnited States
Rob CheungUnited States
Tejas GawandeUnited States
Jennifer PhanGermany
Justin WaldronUnited States
Nathan BaschezUnited StatesGlobal footprint
Where Substack has talent and traffic
team presence
across markets
Talent graph
The shape of Substack's talent
Dealroom maps Substack's team person by person — pinpointing the standout operators and scoring them across the six dimensions investors underwrite. The counts and shape below are a public preview; the named individuals and exact scores live in the platform.
Source: Dealroom Talent Intelligence. Public profiles show counts and the team's shape only — request a demo for the named individuals, per-person seniority and tenure, and team benchmarks vs peers.
Market sentiment
What the market is saying about Substack
An AI-synthesized read of the highest-engagement posts about Substack on X over the past 7 days. We rank by likes & retweets, ignore corporate channels, and surface the themes that broke out from real people.
Reading the room on X — pulling top posts and synthesizing themes…
Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour
See Substack on the full Dealroom platform
Live deal flow, founder pedigree, hiring signals, revenue trajectory, and the full cap table.