Grow your newsletter by swapping audiences
with complementary writers.
Substrd matches Substack writers in micro-niches — sourdough baking, indie game dev, mechanical keyboards — with compatible co-writers, then automates the cross-promotion so you can focus on writing.
No guesswork. No cold outreach. Just audience growth that compounds.
Substrd Pro · Audience matching · Cross-promo automation
Match preview
How it works
Everything you need to trade audiences intelligently.
Audience compatibility scoring
Our algorithm maps topic overlap, engagement patterns, and subscriber demographics to surface the newsletters most likely to delight your readers — not just any newsletter in your niche.
One-click cross-promo campaigns
Draft, preview, and send a curated recommendation to your matched partner's audience in under two minutes. No cold emails, no negotiating rates, no awkward DMs.
Conversion tracking on every trade
Know exactly how many of your partner's readers became your paid subscribers — and vice versa. Real ROI, not vanity metrics. Iterate on what actually converts.
Connecting writers in every niche
Your next 500 subscribers
are in someone else's newsletter.
Subscribe to Substrd Pro and start unlocking audience-swap partnerships built on real data.
Subscribe to Substrd Pro