Sponsor comparison
Newsletter sponsorship activity, audience reach, and ad formats — side by side.
Sponsorship breakdown
Productivity
Health & Wellness
Girlboss
250K subscribers
Smarter Brain Insider
20K subscribers
250K subs
20K subs
Calm - Builds stillness and reflective thinking through guided breathing, medita…
March 2022
January 2026
Ad copy examples
Notion
No ad copy available
Calm
Calm - Builds stillness and reflective thinking through guided breathing, meditation, and ambient soundscapes — perfect for cognitive reset.
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