Sponsor comparison

Customer.io vs WorkOS

Newsletter sponsorship activity, audience reach, and ad formats — side by side.

Customer.io

customer.io

WorkOS

www.workos.com

Sponsorship breakdown

Category

Customer.io

WorkOS

Industry

Technology

Software

Newsletter

MKT1 Newsletter with Emily Kramer

54K subscribers

TLDR

150K subscribers

Audience reach

54K subs

150K subs

Ad format

Header Sponsorship

used by Notion, Segment, and Clearbit to message and engage with customers acros…

Header Sponsorship

Last recorded

May 2025

November 2021

Ad copy examples

Customer.io

used by Notion, Segment, and Clearbit to message and engage with customers across email, push, in-app, SMS, Slack, and WhatsApp. It’s easy to plug in your data and trigger campaigns based on just about anything: profiled attributes, events, actions—you name it.

WorkOS

No ad copy available

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