Substack - Wikipedia Substack was founded in 2017 by Chris Best, the co-founder of Kik Messenger; Jairaj Sethi, a developer; and Hamish McKenzie, a

Substack - Wikipedia Substack was founded in 2017 by Chris Best, the co-founder of Kik Messenger; Jairaj Sethi, a developer; and Hamish McKenzie, a