Kimai is an open-source time tracking platform designed for project-driven teams and businesses of all sizes. Made in Austria, it helps you keep track of and analyse your company’s time data so you always know where your team’s hours — and money — are going. Available either as a fully managed Kimai Cloud service or as a self-hosted application, it gives you every core feature a business needs for its time-tracking and invoicing workflows, wrapped in a clean, intuitive interface.

Key Features

• Timesheets & activities — Record time against customers, projects and activities with tags, plus a live clock for one-click start and stop.
• Reporting & analysis — Analyse recorded times by user, customer, project, activity, tag or time period to understand where effort goes.
• Invoicing — Configurable invoice templates, entry grouping and invoice numbers, exported as PDF or DOCX.
• JSON API — An extensive REST API for reading and writing data, so external apps and custom tools can integrate with Kimai.
• Authentication & security — Login via LDAP and SAML across providers (Google Workspace, Azure AD, Authentik) plus optional TOTP two-factor authentication.
• Cloud or self-hosted — Choose fully managed Kimai Cloud or self-host with Docker for full data ownership.
• Plugin marketplace — Extend Kimai with community and official plugins.
• GDPR-compliant EU hosting — Cloud deployments run on EU infrastructure with automatic updates and backups.

Why Use Kimai?

Kimai is built for teams that need accurate, invoice-ready time data without locking themselves into a subscription. It gives businesses full ownership of their data when self-hosted, or the convenience of a managed cloud with GDPR-compliant EU hosting when they prefer not to run their own server. The straightforward interface means low training cost, while the JSON API and plugin ecosystem keep it extensible as needs grow.

Use Cases

• Freelancers and agencies tracking billable hours across multiple client projects
• Small and medium businesses managing team workload and capacity
• Finance teams generating invoices directly from recorded timesheets
• Companies that need on-premise time tracking for data sovereignty

Platform

Web-based (self-hosted via Docker or manual install) · Linux · Windows · macOS server · Kimai Cloud

Licence

GNU AGPL v3 (open source, self-hosted edition)

Website

kimai.org