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Media · AWS

Substack

Publishing platform; AI writing/discovery features on OpenAI.

Foundation proximity: Direct API

Foundational models & how they consume them

PrimaryGPT· OpenAI API · Direct API

Cloud & datastore

AWSPostgreSQL

Compliance

SOC 2

Similar companies

Disney
Head-to-head: Substack vs Disney

Others that build on OpenAI · GPT

AbridgeAirbnbAirtableAmbienceAmplitudeAsana

Explore

Direct API →More on AWS →

FAQ

Does Substack use a foundational AI model?
Substack uses GPT (Direct API).
What cloud does Substack run on?
Substack runs on AWS.
What database does Substack use?
Substack uses PostgreSQL.
How close does Substack run to the foundational model?
Substack is Direct API — close to the metal, so cheaper tokens and more control over outputs.

Sources

substack.com ↗

Also on the map

OpenAI · GPT

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Architecture inferred from public sources · confidence low · verify before betting on a detail.