What is "sendgrid"

SendGrid is a Boulder, Colorado-based transactional email delivery and management service. The company was founded by Isaac Saldana, Jose Lopez, and Tim Jenkins in 2009, and incubated through the TechStars accelerator program. As of 2013, SendGrid has raised over $27 million and has offices in Boulder, Denver, Orange, California, and London, and operations in New York City and San Francisco.