Grow your Substack by swapping readers, not shouting into the void.

Folio X matches indie personal finance writers for automated subscriber swaps — then A/B tests every swap so you compound the ones that actually convert.

Side Hustle Weekly✦Tax Optimization Today✦Dividend Investor✦FI/RE Dispatch✦Passive Income Pro✦Crypto & Clarity✦Budget Babe✦The Frugalist✦Wealth Builder✦Money Unfiltered✦Side Hustle Weekly✦Tax Optimization Today✦Dividend Investor✦FI/RE Dispatch✦Passive Income Pro✦Crypto & Clarity✦Budget Babe✦The Frugalist✦Wealth Builder✦Money Unfiltered✦

How it works

Four steps from
zero to compounding.

Match

We analyze your newsletter's niche, audience size, and growth goals to surface complementary writers — not competitors.

Swap

Both writers send a co-authored recommendation to each other's lists. Automated. Scheduled. Takes five minutes to set up.

A/B Test

Every swap runs a built-in split test. We track open rates, clicks, and net new subscribers so you know exactly what works.

Grow

Rinse and repeat with the best-performing partners. Compound your audience without buying ads or begging for shoutouts.

3×

avg. subscriber growth vs. going solo

A/B

every swap tested — no guessing what converts

~5 min

to set up your first swap end-to-end

Stop writing for the void.
Start swapping readers.

Join the waitlist and we'll match you with your first complementary newsletter within a week.

Join the Waitlist →