Letterhead's $34M raise + Deliverability rates

October 23, 2025 |
Keenen Charles

This week newsletter startup Letterhead announced a big Series A raise, signaling a renewed interest in newsletters as a business tool. We also have a deep dive into email deliverability rates in 2025 and a look at how your newsletter can pay off beyond ads.

Also the featured newsletters this week cover remote work, fishing, stocks, and more!

šŸ“° News & Articles

Ways Your Newsletter Can Pay Off

A look at how you can benefit from your newsletter besides subscriber revenue and ads

Letterhead raises $34M to turn email newsletters into a full-scale business engine

Miami startup Letterhead announced they have raised $34 million in Series A funding, signaling that newsletters are reemerging as one of the central tools brands rely on.

What’s a Good Email Deliverability Rate in 2025?

An exploration of current email deliverability benchmarks and strategies to improve your newsletter's reach.

⭐ Featured Newsletters

Not For Company Useā„¢

Workplace dysfunction decoded with humor and strategy

Snap Sense

Your Daily Snap of Unbiased News

Penny Stock Alerts

Free, high-potential penny stock setups—before they move.

Current Flow State Fly Fishing

Make fly-fishing a bigger part of your life.

Remote Queer

Remote work and travel resources for LGBTQ+ digital nomads

See Ya

This is our weekly newsletter covering tips and tools for newsletter operators and everything else happening in the email newsletter space. Hope you enjoyed it!

Keenen Charles

Keenen is the creator of InboxReads and a believer in the future of newsletters and email for sharing great content.

Related Articles

Check out similar articles related to weekly-newsletter.

Find your next newsletter sponsor with the all-in-one newsletter ad platform reinventing how you buy and sell ads.

This page may include affiliate links. When you buy through these links I may earn a small commission at no additional cost to you.