About
Powering the next generation of newsletter advertising.
Subletter.io is a performance-driven advertising platform built for the modern newsletter ecosystem. We help brands reach highly targeted audiences across hundreds of verified newsletters — while giving publishers a simple, transparent way to monetize their work.
Our mission is to make newsletter advertising radically more efficient, profitable, and accessible for both sides of the marketplace.
Our Vision
Newsletters are becoming one of the most trusted and influential media channels in the world. Yet, buying or selling ads in newsletters has historically been slow, manual, and inefficient.
We’re building the infrastructure that transforms newsletters into a scalable, data-driven advertising channel.
A world where:
Advertisers can reach the right audience instantly.
Publishers can monetize with transparency and consistency.
Growth is driven by performance — not guesswork.
What We Do
Subletter.io connects advertisers to verified, high-quality newsletters through two simple performance products:
1. Click Campaigns
Reach real, engaged readers in the exact niches that matter to you.
You choose your targeting (category, language, country), set your budget, and we guarantee real clicks from vetted newsletters.
2. Opt-ins
Grow your audience by getting subscribers directly from newsletters within your niche.
It’s the easiest, most predictable way to acquire high-intent subscribers.
Everything is built around metrics, transparency, and efficiency — no guesswork, no hidden fees.
For Advertisers
Access hundreds of niche newsletters
Guaranteed performance (clicks or subscribers)
Precise targeting across language, country, and category
Verified audiences, fraud-prevention, and real-time reporting
Clear, simple pricing — pay only for the results you get
Brands use Subletter.io to scale distribution, launch products, or reach highly qualified prospects globally.
For Publishers
We help newsletter creators monetize effortlessly:
Get paid automatically through Stripe
Receive ads that match your niche and audience
Earn predictable revenue with performance payouts
Maintain full control over what runs in your newsletter
Our goal is to help independent publishers grow sustainable revenue without chasing sponsors, negotiating deals, or emailing back and forth.
Why We Exist
The newsletter economy is exploding — but the tools haven’t kept up.
Creators struggle to monetize consistently.
Advertisers struggle to reach niche audiences efficiently.
We solve both sides with a transparent, data-driven platform built for scale:
Verified newsletter audiences
Guaranteed performance
Automation at every step
Global reach
No friction
We believe the future of advertising belongs to trusted, creator-led media — and we’re building the marketplace that powers it.
Our Approach
Performance-first — Every campaign is designed to deliver measurable results.
Transparency — Clear reporting, verified metrics, no opaque placements.
Quality over quantity — We onboard and verify newsletters manually to ensure real audiences.
Global access — Campaigns run in any language, on any market, worldwide.
Lean & focused — We build fast, ship often, and listen to our users.
Join Us
Whether you're a brand looking for targeted distribution or a creator looking to monetize your newsletter, Subletter.io makes it simple, predictable, and scalable.
The future of newsletter advertising starts here.