SendGrid

SendGrid is a Denver, Colorado-based customer communication platform for transactional and marketing email. The company was founded by Isaac Saldana, Jose Lopez, and Tim Jenkins in 2009, and incubated through the Techstars accelerator program. As of 2017, SendGrid has raised over $81 million and has offices in Denver, Colorado; Boulder, Colorado; Irvine, California; Redwood City, California; and London.