Built for personal finance writers

Grow your Substack.
Get paid to collaborate.

LetterMint auto-matches indie Substack writers with overlapping audiences — then pays you via Stripe every time a referred reader opens your partner's newsletter.

Join the WaitlistSee how it works
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200+ writers already on the waitlist

How It Works

From connection to cash,
in three simple steps.

01

Connect & Share

Connect your Substack and share anonymized audience data — niche, engagement rate, subscriber count.

02

Auto-Match

Our algorithm matches you with personal finance writers whose audiences overlap most with yours — zero manual searching.

03

Swap & Earn

Swap subscriber lists, track reader engagement, and earn Stripe payouts every time one of your referrals reads.

Why LetterMint

The smartest growth
channel for writers
who write to earn.

Most growth tactics burn money or time. LetterMint turns your existing audience into a flywheel — matching you with writers your readers already trust.

No ad spend needed

Skip the Facebook ads and newsletter sponsorships. Grow organically through writers who already share your audience.

Only relevant audiences

Every match is filtered by niche, engagement quality, and audience overlap — so new subscribers actually stick around.

Get paid when they read

Earn real Stripe payouts — not just subscriber counts. LetterMint tracks engagement and pays out for readers who actually open.

Join 200+ personal finance writers
already on the waitlist.

Early access members lock in 0% platform fees for their first 6 months.

Get Early Access

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Drop your email and we'll reach out when your spot is ready. No spam, no noise — just your invite.

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