Newsletter Insights — independent newsletter & sponsorship data across 32K+ newsletters
Browse all →A new world strategy studio helping make sense of the modern brand landscape. We help brands navigate culture, complexity, and change—building strategies that resonate and endure.
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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 includedPost-Culture by Sibling Studio's metrics, benchmarks, and sponsor data in one document
5K
Above Median in Marketing
substack
Marketing
0.52%· ~26/post
(comments + likes) / subscribers
vs 0.00% category avg
Weekly
1.3 posts/week avg
vs 1.0/week category avg
$8/mo
Category avg: $7/mo
225
newsletters in Marketing
Above Median in Marketing
out of 225 newslettersPublishing Frequency
Weekly
Last published Mar 31, 2026
1.3 posts/week avg
