Todoist is a cross-platform task management application that helps individuals and teams organize, prioritize, and complete tasks across work and personal life. Launched in 2007, it combines simplicity with powerful features like natural language processing, filters, and integrations to help users achieve productivity goals. The key mental model: Todoist transforms scattered thoughts into actionable tasks using a flexible hierarchy of projects, sections, and labels—think of it as GTD (Getting Things Done) meets modern minimalism, where quick capture meets sophisticated organization without overwhelming complexity.