The newsletter platform built only for publishers.
Sailthru is now part of Zeta Global, acquired in 2025. If you want a platform built only for newsletters — not one module inside a larger marketing cloud — there’s a focused, publisher-first alternative.
- Independent and publisher-first — not one module in a marketing cloud
- Newsletters as products: production, monetization, and intelligence in one place
- Easy to move — send with Letterhead, or keep your current ESP if you need to
- Live in days, with a dedicated CSM who knows media
Trusted by New York Post, Condé Nast, Townsquare Media, and hundreds more.
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The world’s leading newsletter teams run on Letterhead
What teams see after switching to Letterhead.
Great content earns engagement. Engagement earns revenue. Revenue drives the business. Teams using Letterhead see all three improve within the first 90 days.
on existing newsletters, 90 days after switching to Letterhead
on monetized sends after 180 days through sales, CTAs, advertising
per edition, on average
How it works
Moving is the easy part.
Tell us your goals
The 30-second form — your titles, your audience, and what Sailthru isn’t doing for you.
A migration that’s actually easy
We map your templates and audiences and get you live in days. Send with Letterhead’s built-in delivery, or keep sending through your current ESP — your call.
Take the wheel
See the product on a portfolio like yours, get a pricing anchor for your size, and try every feature hands-on.
“We’ve never seen open rates this high before in the history of our sending.”
— Townsquare Media
Questions, answered.
Is Sailthru being discontinued?
No. Sailthru is now part of Zeta Global, which completed its acquisition of Marigold’s enterprise business in November 2025, and it remains available. The real question for newsletter teams is focus: Letterhead is built only for newsletters — production, monetization, and intelligence — so your program isn’t one module inside a larger marketing cloud.
Do we have to leave Sailthru?
Only if you want to. Moving to Letterhead is fast — live in days. Send with Letterhead’s built-in delivery, or keep sending through your existing ESP if you’d rather. Either way you get modern newsletter production, monetization, and intelligence.
What happens to our templates and audiences?
We map your existing templates into company-level, lockable templates and connect your audience data — most teams standardize and simplify in the process rather than recreating chaos.
How long does it take to go live?
Days, not quarters. White-glove onboarding and a dedicated CSM who understands media and newsletters.
Is Letterhead built for large publishers?
Yes — New York Post, Condé Nast, and Townsquare Media run newsletter portfolios on Letterhead.
See Letterhead on a portfolio like yours.
Tell us what you’re trying to do with newsletters. We’ll show you the product, answer the questions a deck won’t, and hand you a pricing anchor for your size.