How Metro built 300K Subscribers + Email Benchmarks

December 4, 2025 |
Keenen Charles

This week there's a look at how Metro built 300,000 newsletter subscribers, email marketing benchmarks for 2026, and thoughts from writers on Substack.

Also the featured newsletters this week cover reefs, football, screen time and more!

📰 News & Articles

How Metro Built 300,000 Newsletter Subscribers

Head of Newsletters, Sophie Laughton explains how the free commuter paper is using WhatsApp, personalised fact boxes, and print as a funnel to drive double-digit growth.

Email marketing benchmarks by industry and region for 2026

Mailerlite has compiled a list of email marketing benchmarks to help guide your strategy for 2026.

Is Substack still a space for writers and readers?

5 writers weigh in on the celebrification (and potential slop-ification) of Substack.

⭐ Featured Newsletters

Take Back Your Time

Reduce your screen time

Ctrl Alt Deliberate

A soft reboot for your newsfeed

The Warm-Up

#1 Source for Music That Fuels Champions

Salty Reef

Salty Reef brings the color and wonder of the reef to your inbox.

Real Football Filter

Filtering out the noise in football, one issue at a time.

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.

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