Best Open Source Time Tracking Tools in 2026

Tools for logging work hours, tracking billable time, and generating reports for individuals and teams.

1 open source time tracking tools — ranked by GitHub stars. Browse all

TimeTracker

A robust, self-hosted time tracking application designed for teams and freelancers who need reliable time management without cloud dependencies. Built with Flask and optimized for Raspberry Pi deployment, TimeTracker provides persistent timers, comprehensive reporting, and a modern web interface.

Alternative to:

Harvest