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Letterhead

Master newsletters at scale·tryletterhead.com

Letterhead is a newsletter operating system for teams running one to one thousand newsletters. It provides portfolio governance, drag-and-drop production, content and audience intelligence, revenue and ad operations, and agentic workflows in one connected platform. It comes in two forms: Studio, which layers onto an existing ESP, and Suite, a complete email operating system with built-in audience management and sending.

What it's for

managing a portfolio of many newsletters from one workspacedrag-and-drop newsletter production without codecross-newsletter content and audience analyticssponsorship, ad, and revenue operations for newslettersunified audience profiles and segmentationemail deliverability, dedicated IPs, and sendingAI agents drafting, curating, and queuing newsletter sends

Features 20

AI agents that curate, draft, segment, and queue sends for approval
AI blocks that draft content and suggest subject lines
Approval workflows with audit trail
Audience tiers and segment discovery
Cross-newsletter benchmarks and content attribution
Dedicated IP pools, migration, and deliverability warmup (Suite)
Drag-and-drop newsletter editor
Dynamic, personalized content sections
Global and lockable brand templates
Google Docs import into formatted newsletters
Intelligent content curation from CMS, RSS, or content lake
Per-tenant MCP server for AI agents and customer systems
Polls and quizzes embedded in editions
Portfolio-wide workspaces and governance
Pre-flight checks (broken links, spam scoring, clipping risk)
Shared curations library across brands
Sponsorship inventory, house promotions, and per-send revenue reporting
Targetable blocks fillable via API
Unified user-level audience profiles, segmentation, and journeys (Suite)
Versioned REST API, webhooks, and Zapier integration

At a glance

API

TypeWeb app

DeploymentCloud

PlatformsWeb

Forteams running multiple newsletters, media companies, agencies running newsletters for clients, enterprise companies

CompanyLetterhead

Integrations

IterableBrazeClaudeGoogle DocsMailchimpKlaviyoAmazon S3ZapierAdestraConstant ContactBeehiivHubSpotCordialSlackSalesforce Marketing Cloud

Complianceself-reported

GDPRSOC 2CCPA

Resources

Docs

Pricing

Both Studio and Suite are priced on an enterprise, quote basis scoped to portfolio size and capabilities (and, for Suite, send volume); prospective customers contact sales for a number. Suite's owned sending is priced at $0.10 per 1,000 sends.

StudioQuote

Pricing is quote-based; contact sales for a quote. Layers on top of an existing ESP.

Enterprise pricing scoped to portfolio size and capabilities.

SuiteQuote

Pricing is quote-based; contact sales for a quote. Includes built-in audience and sending.

Enterprise pricing scoped to portfolio size, capabilities, and send volume.