Kimai

Name: Kimai
Brand: Kimai
Price: 1 USD
Availability: InStock

Professional Services Automation

Open Source

Paid Plans

Self-hosted

OpenMSP Score

Reddit Impact Score

Github Score

14M

4KStars

754Forks

1KCommits

GNU Affero General Public License v3.0License

Mar 19, 2026Last commit

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Key Features

Time Tracking & Timesheets

Comprehensive time tracking with start/stop timers, manual time entry, and detailed timesheet management for projects and activities

Project & Customer Management

Organize work by customers, projects, and activities with budgets, rates, and detailed project tracking capabilities

Invoicing & Billing

Generate professional invoices from tracked time with customizable templates in multiple formats (PDF, DOCX, HTML, CSV)

Advanced Reporting & Analytics

Detailed reports on time usage, project progress, team performance with export capabilities and customizable dashboards

Multi-User Collaboration

Team management with role-based permissions, user groups, and collaborative project tracking for unlimited users

Pros and Cons

Pros

Completely Free & Open Source

No licensing costs for self-hosted version with full access to source code and unlimited users

Comprehensive Feature Set

Complete time tracking solution with invoicing, reporting, project management, and team collaboration in one platform

Flexible Deployment Options

Available as self-hosted open source or managed cloud service with same feature set

Mobile-First Responsive Design

Works seamlessly on mobile devices with dedicated mobile apps available for iOS and Android

Extensive API & Integrations

JSON REST API enables custom integrations and plugin ecosystem for extended functionality

Cons

Self-Hosting Complexity

Requires technical expertise to set up, maintain, and secure self-hosted installations

Limited Advanced Features

Lacks some enterprise features like advanced resource planning, Gantt charts, or sophisticated project templates

UI Learning Curve

Interface can be overwhelming for new users due to extensive feature set and configuration options

Limited Built-in Integrations

Fewer native integrations compared to commercial solutions, though API enables custom connections

Feature Comparison

Comments

Landon Wells • TechGuardian MSP

Jun 26, 2025

Great for MSP Billing and Invoicing

Kimai invoicing capabilities streamline our MSP billing processes. Being able to track time spent on different client projects and generate detailed invoices has improved our revenue management significantly.

Mila Horvat • DataFlow Hub