Early Access — Free to Join

Grow your Substack
by collaborating with
complementary writers.

LetterPair matches you with newsletters your readers already love, then auto-arranges subscriber swaps and splits revenue from cross-promotions — zero cold emails required.

Deep Work Tips↔Note-Taking Tools
Solopreneur Growth↔AI Productivity
Creator Finance↔Newsletter Strategy

No spam. No credit card. Just early access.

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500+ Substack writers are already growing together on LetterPair.

How it works

Three steps to your next 1,000 subscribers.

01 — Match

Find your perfect pair.

Tell us your niche and audience size. Our algorithm surfaces newsletters with complementary content and similar subscriber counts — no awkward cold outreach needed.

02 — Swap

Share your audience.

LetterPair automatically coordinates subscriber list swaps and cross-promotions on a schedule that works for both writers. Set it and forget it.

03 — Grow

Watch the numbers climb.

Track new subscribers, open rates, and shared revenue from each collaboration in one dashboard. Repeat with new partners as you scale.

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Ready to grow together?

Join the waitlist and be among the first writers to unlock LetterPair when we launch.

No spam. No credit card. Just early access.