Kimai

Kimai is a web-based time tracking and timesheet application for freelancers, agencies, and teams. It helps you record work time against customers/projects/activities, manage rates, and generate reports and exports for billing and payroll workflows.

Key Features

• Track time via browser UI with running timers and manual entries
• Organize work by customer, project, and activity with configurable rates
• Timesheets with filtering, approvals/validation workflows (via permissions) and comments
• Reporting and analytics with export options (e.g., CSV/Excel/PDF depending on setup/extensions)
• User, team, and role-based access control (RBAC) for multi-user environments
• Extensible via a plugin/extension system (marketplace) to add features (e.g., invoicing, expenses, additional reporting)
• API support for integrations and automation
• Internationalization (multi-language UI) and configurable currencies/time zones

Use Cases

• Freelancers tracking billable hours per client/project and exporting timesheets for invoicing
• Agencies tracking team time across projects with permission-controlled access and reporting
• Internal teams tracking effort for cost allocation, payroll inputs, or project analytics

Limitations and Considerations

• Some advanced features (e.g., invoicing/expenses, specialized reports) may require installing extensions rather than being included in the core

Kimai is a mature option for organizations that want full control of time tracking data while supporting multi-user workflows, reporting, and integrations. Its structured customer/project/activity model and extension ecosystem make it suitable from solo use up to team deployments.