Newsletter Insights — independent newsletter & sponsorship data across 42K+ newsletters
Browse all →Enter your email and we'll send your inquiry to the Newsletter Insights team.
Tell us your brand and audience. We send back 10-15 newsletters matched to your brief, with sponsor history and CPM ranges per placement.
$300·2-3 working days·refunded if we can't deliver
See what's includedA Locked Room's metrics, benchmarks, and sponsor data in one document
1K
Below Median in Politics
substack
Politics
WeeklyOn pause
Last published Jul 10, 2026
$5/mo
Category avg: $6.5/mo
622
newsletters in Politics
Below Median in Politics
out of 622 newslettersPublishing Frequency
Weekly
Inactive — last post 3 months ago
