Your next 1,000 subscribers are already reading someone else’s newsletter.
LetterBond pairs indie Substack writers with complementary newsletters and automates subscriber swaps — so you grow together, not in competition.
Joining writers in productivity · finance · creative writing · solopreneur tools
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How it works
Three steps. No spreadsheets. No cold DMs.
Connect your newsletter
Link your Substack and tell us your niche. We analyze your audience so we can find your best matches.
Get matched with compatible writers
LetterBond surfaces newsletters with overlapping topics but non-competing audiences — productivity meets finance, writing meets tools.
Swap, track, and grow
Automate the swap and measure which partnerships drive your most engaged new subscribers — not just raw numbers.
Built for serious indie writers
Smart matching, not random swaps
We match on audience overlap, engagement rate, and niche compatibility — not just follower count.
Track engagement, not just signups
See which partner newsletters sent you readers who actually open, click, and stick around.
Automated coordination
No back-and-forth scheduling. LetterBond handles timing, reminders, and confirmation between both writers.
Your list stays yours
We never share or sell subscriber data. Swaps are opt-in, controlled, and auditable at every step.
Founder pricing — while it lasts
We’re opening access to a small group of founding writers at a one-time rate. No subscription. No renewal. Lifetime access at the price you lock in today.
LetterBond Pro — Founder Access
- ✦Full access to the swap network
- ✦Engagement tracking dashboard
- ✦Stripe-gated preview link sharing
- ✦Priority matching & early features
- ✦Lifetime access — price goes up at launch
Secure checkout via Stripe · Instant access
“The best newsletters don’t grow in isolation. They grow by finding their people — wherever they already read.”
— The LetterBond thesis
Ready to grow with intention?
Grab your founder spot before we raise prices at launch. One-time payment. Lifetime access.
Secure checkout via Stripe · No subscription required
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