Sam Seely

Sam Seely is the co-founder and CEO of Knock, a New York-based notification infrastructure company that turned the tedious plumbing of transactional email, push, SMS and in-app messages into an API and workflow engine used by Vercel, Amplitude and others. He and CTO Chris Bell, who met at Frame.io, launched Knock in 2021 and raised a $12M Series A led by Craft Ventures in February 2024, bringing total funding to $18M.