Results
Lift opens and clicks 32%.
That's the average engagement lift across portfolios in their first 90 days on Letterhead. Opens start in the inbox and clicks start with the content. We work on both.
Our tools
What moves the numbers.
Winning subject lines
The subject-line patterns that win across every send, ranked so you can use them again.
AI blocks
Writes from your edition's content, suggests subject lines and preview text — and learns from past performance.
Dynamic content
Conditional, personalized content sections. One send that reads differently for every segment.
Polls & quizzes
Run polls and quizzes inside the edition. Engagement happens right in the inbox — and you keep every response.
Deliverability management
Sender reputation, list health, and authentication watched continuously across every send.
Pre-flight checks
Brand guidelines, broken links, spam scoring, clipping risk. Caught before send, not after.
Content attribution
See which topics, formats, and authors actually drive engagement. Patterns, not guesses.
Automatic engagement tiers
Every subscriber lands in a behavioral tier, from loyalists to ghosts, each with a recommended next move.
Our support
Specialists who live in the inbox.
Engagement problems are rarely one problem. The team helps you find which one is yours.
Deliverability experts
Placement, authentication, and reputation, watched by people who do this all day. If opens dip, we know why before you ask.
Honest send reviews
We run a Bad Newsletter workshop for a reason. Get specific, useful feedback on what's keeping readers from clicking.
A CSM on your numbers
One person who watches your benchmarks with you and works the plan when a send underperforms.
See the lift on your own sends.
Bring 90 days of send data. We'll show you where the opens and clicks are hiding, and what Letterhead would do differently from your first send.