For AI-tools Substack writers
Grow your Substack audience on autopilot.
CoAuthor automatically connects indie Substack writers in the AI tools for creators niche — swapping subscriber lists based on engagement, not guesswork. Built-in A/B testing does the rest.
How it works
01
Smart swaps,
not guesswork
CoAuthor matches you with writers whose audiences actually want to hear from you — using open rates, click-throughs, and engagement signals to find the right swap partners.
02
A/B testing,
built in
Every swap is an experiment. CoAuthor tests subject lines, send times, and intro copy automatically — then doubles down on what converts. Growth becomes a compounding process.
03
One niche,
on purpose
CoAuthor only works with writers in the AI tools for creators niche. A tighter network means higher relevance, better conversions, and subscribers who actually stay.
Ready to stop growing alone?
Join writers already on the waitlist.