Media Newsletters Are Booming, and Substack’s Co-Founders Lit the Fuse

Last year, Substack’s only employees were its three co-founders: Hamish McKenzie, Chris Best and Jairaj Sethi. Now, the San Francisco-based startup has a bigger team–it’s up to 18 employees–and even bigger ambitions: trying to do nothing less than reinvigorate the flagging media industry. To do so, the trio–Adweek’s Publishing Executives of the Year–have built their…
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