What is Kimai used for?

Kimai is an open-source, web-based time-tracking application with timesheets, reports and invoicing for freelancers and teams, in self-hosted or SaaS form. It is a good fit for freelancer time tracking and invoicing, agency project hour reporting, and team timesheets for billing.

Is Kimai open source?

Yes. Kimai is open source under the AGPL-3.0 licence. Its source code is on GitHub at kimai/kimai and is written mainly in PHP.

Yes. Kimai is open source, so the software itself is free to use. A managed cloud version is also available, with paid plans from €3.99 per seat per month.

Can I self-host Kimai?

Yes. Kimai can be self-hosted on your own server or infrastructure.

What is Kimai an alternative to?

Kimai is an open-source alternative to Clockify, Harvest, Toggl Track and Timely. Other open-source alternatives to Clockify include Solidtime, Traggo and Watson.

Is Kimai actively maintained?

Yes. The most recent commit to Kimai was on 2 October 2026, and the latest release is 2.67.0, published on 13 September 2026. The project has 5.1k stars on GitHub.

Kimai: open-source alternative to Clockify, Harvest

About Kimai

Kimai is a professional time-tracking application that is free and open source. It handles use cases from solo freelancers to companies with dozens or hundreds of users, letting people record the time they spend on customers and projects, review timesheets and produce reports and invoices.

The feature list includes a JSON API, invoicing, data exports, multiple timers, a punch-in and punch-out mode, tags, multi-user support with multiple time zones, and translations into more than 30 languages. For security and administration it offers authentication via SAML, LDAP or the local database, two-factor authentication with TOTP, customizable role and team permissions and a responsive design. The application is built with PHP and Symfony.

Kimai is licensed under AGPL-3.0 and can be run on-premises on your own server, or you can use the SaaS version offered by the project. It suits freelancers, agencies and small and mid-sized companies that bill by the hour and want to keep time data under their control.

Key features

Timesheets with multi-timer and punch-in modes
Invoicing and data exports
Customer and project reports
JSON API for integrations
SAML, LDAP and two-factor authentication
Role and team permissions

Good fit for

→Freelancer time tracking and invoicing
→Agency project hour reporting
→Team timesheets for billing

Built with: PHP
Tags: time-tracking; timesheets; invoicing; php; symfony; self-hosted; reporting; saas

Kimai: questions and answers

What is Kimai used for?: Kimai is an open-source, web-based time-tracking application with timesheets, reports and invoicing for freelancers and teams, in self-hosted or SaaS form. It is a good fit for freelancer time tracking and invoicing, agency project hour reporting, and team timesheets for billing.
Is Kimai open source?: Yes. Kimai is open source under the AGPL-3.0 licence. Its source code is on GitHub at kimai/kimai and is written mainly in PHP.
Is Kimai free?: Yes. Kimai is open source, so the software itself is free to use. A managed cloud version is also available, with paid plans from €3.99 per seat per month.
Can I self-host Kimai?: Yes. Kimai can be self-hosted on your own server or infrastructure.
What is Kimai an alternative to?: Kimai is an open-source alternative to Clockify, Harvest, Toggl Track and Timely. Other open-source alternatives to Clockify include Solidtime, Traggo and Watson.
Is Kimai actively maintained?: Yes. The most recent commit to Kimai was on 2 October 2026, and the latest release is 2.67.0, published on 13 September 2026. The project has 5.1k stars on GitHub.