Hotel Engine, valued at $2.1 billion, has raised $221 million across multiple rounds, including a $140 million Series C led by Permira and Blackstone. Founded in 2015 and based in Denver, Colorado, Hotel Engine provides a SaaS platform for business travel, enabling companies to manage hotel bookings, billing, and lodging efficiently. The platform offers mobile apps, analytics, and reporting tools to optimize travel operations. With investors like Telescope Partners, Hotel Engine has become a leading provider of cloud-based corporate travel solutions.