← discovery module
◌ Coming soondiscovery

Newsletter authors who write about your category.

Indexes 800k+ Substacks. Ranks by category fit, paid subscriber estimate, and openness to sponsorship.

01 · The problem

What you're up against

Substack is a goldmine for niche audiences. There's no good way to search it.

02 · How we fix it

What the agent does

Topical matching across 800k newsletters. Surface authors. See their last sponsor placement and est. rate card.

03 · Example output

What you'll see

One run, real shape:

INPUT→ OUTPUT
$ Topic: dev tools
...
→ 23 authors · est. paid subs: 220–14k · 11 with sponsor history
04 · Visual

The interface, sketched

The shape and feel of the surface — actual UI evolves with the beta.

substack-find.growthhunt.ai
“High-trust audiences, low-noise channels.”
EXAMPLE OUTPUT
→ 23 authors · est. paid subs: 220–14k · 11 with sponsor history

Notify me when Substack Author Discovery ships.

No spam. One email when it's ready.