Grow your Substack
with writers who share
your audience.
PenPool matches solopreneur productivity writers by audience overlap, then auto-swaps your back-issue digests with matched subscribers — so both lists grow without cold outreach or guesswork.
The growth stack every
serious writer has been missing.
Precision Audience Matching
Our algorithm reads your archive to find writers whose subscribers actually want what you publish — not just writers in the same broad niche.
Zero Cold Outreach
No awkward DMs, no waiting for replies. PenPool auto-handles the digest swap with your match once both writers opt in — fully automated.
Revenue-Split, Ethically
When a swapped reader converts to a paid subscriber, Stripe splits the attribution revenue fairly between you and your partner. Writers earn together.
From publish to mutual growth
in four steps.
Connect Your Substack
Link your publication in 30 seconds. PenPool reads your archive to build your audience fingerprint.
Get Matched
The algorithm surfaces 3–5 writers whose audiences overlap significantly with yours and who write in complementary sub-niches.
Auto-Swap Digests
PenPool compiles your best back-issues into a curated digest and sends it to a matched segment of your partner's list — and vice versa.
Grow Together
Watch your subscriber count climb. Revenue from converted paid subscribers is split automatically via Stripe.
Join the writer pool
before the first cohort fills.
Secure founding-member access to PenPool’s paid cross-promotion network for indie Substack writers. We’ll use your publication to place you into the first audience-matched swap cohort.
PenPool Founding Member
One-time founding-member access while the initial cross-promotion network is curated.
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