Sponsor comparison
Churnkey vs Customer.io
Newsletter sponsorship activity, audience reach, and ad formats — side by side.
Sponsorship breakdown
Category
Churnkey
Customer.io
Industry
—
Technology
Newsletter
Elena's Growth Scoop
50K subscribers
MKT1 Newsletter with Emily Kramer
54K subscribers
Audience reach
50K subs
54K subs
Ad format
Sponsored By
Header Sponsorship
used by Notion, Segment, and Clearbit to message and engage with customers acros…
Last recorded
March 2026
May 2025
Ad copy examples
Churnkey
No ad copy available
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.
Get the full sponsor picture
Contact details, decision makers, email addresses, and complete sponsorship history for both brands.
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