Newsletter Insights — independent newsletter & sponsorship data across 40K+ newsletters
Browse all →Click to read Glenn Kirschner, a Substack publication with hundreds of thousands of subscribers.
Enter your email and we'll connect you with this newsletter.
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 includedGlenn Kirschner's metrics, benchmarks, and sponsor data in one document
federalrule.com
113K
Top 10% in Politics
substack
Politics
0.80%· ~902/post
(comments + likes) / subscribers
vs 0.01% category avg
Daily
9.5 posts/week avg
vs 1.1/week category avg
$6/mo
Category avg: $6/mo
1209
newsletters in Politics
Top 10% in Politics
out of 1209 newslettersPublishing Frequency
Daily
Last published Jul 16, 2026
9.5 posts/week avg
