Knock, a notifications infrastructure startup founded in 2021, has garnered significant attention in the tech industry. With the slogan "Notifications infrastructure for developers," Knock offers flexible, reliable APIs to engage users, power cross-channel workflows, and manage notification preferences. Attracting notable interest, the company secured a substantial $12.00M Series A investment on 15 February 2024. Expa, Afore Capital, Preface Ventures, Tokyo Black, Worklife Ventures, John Kodumal, Michael Grinich, Scott Belsky, Adam Gross, and Guillermo Rauch, are among the prominent investors contributing to this growth. Knock is headquartered in the United States and is positioned to capitalize on the increasing demand for robust notifications infrastructure in the developer community.