Newsletter Insights — independent newsletter & sponsorship data across 41K+ newsletters
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Essays on the endless journey of building products, teams, and ourselves.
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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 includedThe Looking Glass's metrics, benchmarks, and sponsor data in one document
95K
Top 10% in Business
substack
Business
~82/post
avg comments + likes (0.09% rate)
Above category average
Monthly
0.3 posts/week avg
$6/mo
Category avg: $5/mo
767
newsletters in Business
Top 10% in Business
out of 767 newslettersPublishing Frequency
Monthly
Last published Oct 13, 2026
0.3 posts/week avg