LiquidPlanner, Inc. is an online project management software company based in Seattle. The firm was founded in 2006 and launched their first release to a public beta in 2008.LiquidPlanner is a platform-independent, online project management system which features ranged estimates (e.g. 3–5 days) to express the uncertainty in project schedules.This collaborative software is accessible via modern web browsers and mobile applications for iPhone, iPad, and Android operating system-based devices.