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Letterhead Studio
The newsletter layer for any ESP. Add portfolio management, production, intelligence, and revenue to your existing ESP, live in minutes.
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Portfolio
Grow the portfolio, not the workload.
Production
Cut production time by 75%. Increase quality by ∞
Intelligence
Know exactly what’s working.
Revenue
More conversions, better CPMs, every send.
Agents
Give your team a team.
API & MCP
Your newsletters, programmable.
Integrations
Comparisons
Onboarding
Pricing
Suite ▾
Letterhead Suite
The complete email operating system. Manage and grow your newsletter portfolio — from design to production to audience to revenue to deliverability — with a platform purpose built for content and lasting engagement.
Explore Suite
→
Portfolio
Grow the portfolio, not the workload.
Production
Cut production time by 75%. Increase quality by ∞
Intelligence
Know exactly what’s working.
Revenue
More conversions, better CPMs, every send.
Agents
Give your team a team.
API & MCP
Your newsletters, programmable.
Only in Suite
Audience
Know and engage every reader.
Send
Get and stay in the inbox, every time.
Integrations
Comparisons
Onboarding
Pricing
Capabilities ▾
Portfolio
Grow the portfolio, not the workload.
→
Production
Cut production time by 75%. Increase quality by ∞
→
Intelligence
Know exactly what's working.
→
Revenue
More conversions, better CPMs, every send.
→
Agents
Give your team a team.
→
Audience
Suite
Know and engage every reader.
→
Send
Suite
Get and stay in the inbox, every time.
→
API & MCP
Your newsletters, programmable.
→
Platform & Security
Ready for your security review.
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Results ▾
Make production more efficient
Cut hours from every edition.
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Increase open and click rates
Lift opens and clicks on every send.
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Understand user behavior
See what readers actually do.
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Grow your audience
Growth made of readers who stay.
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Drive more revenue
Turn engagement into income.
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Resources ▾
Blog
Original analysis on newsletters.
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Newsletter
What's working in newsletters, weekly.
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Guides
Playbooks, references, and tools.
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