Now accepting early access signups

Grow your newsletter
with creators like you

A Co matches you with complementary newsletters for cross-promotion. Swap recommendations, reach new readers, and grow together — completely free.

Join 50+ newsletter creators already on the waitlist

Trusted by creators

How It Works

Three steps to faster growth

Add your newsletter

Tell us about your newsletter — your niche, audience size, and what makes your content unique.

Get matched

Our algorithm finds newsletters with complementary audiences — readers who'd love your content, and vice versa.

Grow together

Swap recommendations with your matches. You recommend them, they recommend you — everyone grows.

Why Cross-Promote?

The growth channel you're missing

Newsletter cross-promotion is how the fastest-growing creators scale — and it costs nothing.

🚀

100% free growth

No ad spend, no paid campaigns. Cross-promotion is the most cost-effective growth channel for newsletters.

🎯

Perfectly targeted readers

Every recommendation comes from a newsletter your ideal readers already trust and enjoy.

🤝

Mutual benefit

Both sides grow. When you recommend a great newsletter, their audience discovers you too.

✨

Smart matching

Our algorithm considers niche, audience size, and content style to find your ideal partners.

📊

Track your growth

See exactly how many subscribers each cross-promotion brings. Real metrics, real results.

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Community of creators

Join a network of newsletter creators who support each other and share what works.

Early Access

Join the waitlist

Be among the first newsletter creators to try A Co. We'll match you with your ideal cross-promotion partners.

Grow your newsletterwith creators like you