Mixpanel is a business analytics service and company. It tracks user interactions with web and mobile applications and provides tools for targeted communication with them. Its toolset contains in-app A/B tests and user survey forms. Data collected is used to build custom reports and measure user engagement and retention. Mixpanel works with web applications, in particular SaaS, but also supports mobile apps. As of January 2016 the company had more than 230 employees, but had to fire 18 people due to overhiring. Mixpanel was founded by Suhail Doshi and Tim Trefren in 2009 and is based in San Francisco, California. It is backed by Y Combinator, and its list of investors includes Andreessen Horowitz, Max Levchin and Keith Rabois. In 2015 Mixpanel announced Codeless Mobile Analytics with point-and-click interface to track user interactions in their Android or iOS app.