Directory lists 29 developer and AI newsletters with verified subscriber counts for sponsors

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A curated directory called devsponsors tracks 29 developer and AI newsletters available for sponsorship, including 25 on Substack and 4 self-hosted, with data current as of September 2026. The list distinguishes between Substack-stated subscriber counts and self-reported figures from independent newsletters, keeping the two categories clearly labelled and separate. Top newsletters by audience size include The Rundown AI at 1.7 million self-reported subscribers, Superhuman AI at 1.5 million, and TLDR AI at 1.1 million. Nine of the 29 newsletters publicly disclose their sponsors within issues, collectively naming 34 brands, with repeat buyers including Brilliant, CodeRabbit, and Unblocked each appearing three times. The directory also flags which issues are sent only to paying subscribers, since sponsored slots in paywalled editions reach significantly fewer readers than the total subscriber count implies.

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