integrations/
36 pages · Updated July 18, 2026
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- Letterhead + Zoom — webinar registrants become newsletter readers | Letterhead
- Letterhead + OptinMonster — popups that fill your newsletter list | Letterhead
- Letterhead + Instapaper — read-later list in, newsletter out | Letterhead
- Letterhead + Facebook Lead Ads — social leads, straight to your list | Letterhead
- Letterhead + Calendly — every booking grows your audience | Letterhead
- Letterhead + Pocket — saved stories become curated editions | Letterhead
- Letterhead + Feedly — from feed reader to finished newsletter | Letterhead
- Letterhead + Unbounce — from landing page to loyal reader | Letterhead
- Letterhead + Typeform — every form fill becomes a subscriber | Letterhead
- Letterhead + Eventbrite — attendees today, subscribers tomorrow | Letterhead
- Letterhead + Instapage — ad clicks that become subscribers | Letterhead
- Letterhead + Leadpages — landing pages that grow your newsletter | Letterhead
- Letterhead + Mailchimp — newsletters built on top of the audience you already manage | Letterhead
- Letterhead + Constant Contact — keep sending, add the newsletter operation | Letterhead
- Letterhead + Braze — add a newsletter operation to your engagement platform | Letterhead
- Letterhead + Cordial — keep your messaging platform, add the newsletter operation | Letterhead
- Letterhead + Adestra — keep your publisher ESP, add the editorial operation | Letterhead
- Letterhead + Iterable — supercharge Iterable for newsletters | Letterhead
- Letterhead + Listrak — add editorial newsletters to your retail marketing engine | Letterhead
- Letterhead + Adobe Campaign — add a newsletter operation to your enterprise sender | Letterhead
- Custom integration — we'll build the connection your stack needs | Letterhead
- Letterhead + LiveIntent — newsletter ad revenue, on autopilot | Letterhead
- Letterhead + CUE — your CUE newsroom content, newsletter-ready | Letterhead
- Letterhead + Shopify — your store, in the newsletter | Letterhead
- Letterhead + CitySpark — local events, in every edition | Letterhead
- Letterhead + BLOX — your newsroom content, in the inbox | Letterhead
- Letterhead + Piano — subscription data, working in every send | Letterhead
- Letterhead + WordPress — your WordPress content, newsletter-ready | Letterhead
- Letterhead + Evvnt — events content and events revenue, together | Letterhead
- Letterhead + RevContent — monetize the newsletter with native units | Letterhead
- Letterhead + Sanity — structured content, straight into editions | Letterhead
- Letterhead + Zephyr — your subscriber and content data, in every edition | Letterhead
- Letterhead + Salesforce — your CRM, your sender, and your newsletter in sync | Letterhead
- Letterhead + HubSpot — newsletters that run on your HubSpot data | Letterhead
- Letterhead + BlueConic — your CDP profiles, working in the newsletter | Letterhead
- Integrations — Letterhead