Substack

Company United States

Substack is a company in social networks and media platforms founded in 2,017^[1] and based in San Francisco, California^[1].

“Substack is the app for independent voices: a free newsletter, video, and podcast hosting platform with paid subscriptions built in.”^[2]

27 recorded numbers and 3 open-web sources. Who stands behind each item: 60 from the system atlas registry.

3 sourcesUpdated 12 hours agoAbout this record

Mapped from public sourcesFirst mapped 3 Nov 2026Updated 12 hours ago3 sourcesAtom feed

Systems: tools and data

Customers: keeping them2

Direction: deciding where it goes2

Control: rules the company runs under1

By layer: People 8 · Process 4 · Software 7 · Data 3 · Decisions 5

On the market

Verification

Not claimed by the company. 60 public findings, none confirmed yet.

Private by default: only what a company publishes, or public sources, reach the registry
Every value carries its source and a confidence label
Unknown is never shown as missing