OpenMSP
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Kimai

Professional Services Automation

Open Source
Paid Plans
Self-hosted
OpenMSP Score
45
24
Reddit Impact Score
Github Score
16M
4KStars
802Forks
1KCommits
GNU Affero General Public License v3.0License
Jul 6, 2026Last commit

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Open source time-tracking software with project management and billing capabilities More detailed information about this vendor will be added soon.
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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 WellsTechGuardian MSP

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 HorvatDataFlow Hub

Mila Horvat • DataFlow Hub

Jun 26, 2025

Perfect for MSP Project Tracking

Kimai time tracking and project management features help us accurately bill clients for services. The reporting capabilities provide detailed insights into team productivity across multiple client projects.

Frequently Asked Questions

Getting Started

OpenMSP is The MSP Knowledge Hub & Community Platform designed specifically for Managed Service Providers seeking to optimize their technology stack, reduce vendor costs, and discover open-source alternatives. We combine a comprehensive vendor directory, open-source solution catalog, and integrated community discussions to help MSPs make informed decisions.
Yes, completely free. Browse vendors and tools, read comparisons, and join community discussions - no cost, no registration required. OpenMSP is community-supported and focused on empowering MSPs to reduce costs and improve operational efficiency through open-source technology.
We help MSPs identify cost-effective alternatives to expensive commercial solutions, provide transparent vendor information, and connect you with proven open-source alternatives. Our platform enables MSPs to make informed decisions about their technology investments.
No account required for browsing vendors, reading comparisons, or accessing community content. Creating a free account with SSO (Microsoft, Google, or Slack) allows you to participate in discussions and save your favorite tools.

Platform Information

OpenMSP is currently community-supported. We focus on providing value to the MSP community first. Any future monetization will keep the core platform free for MSPs while maintaining our independence and commitment to unbiased information.
We focus exclusively on MSP needs with transparent vendor information and open-source alternatives. No vendor partnerships or sponsored listings - just honest, community-driven information to help MSPs make better technology decisions. Our biggest value is our community where MSPs help each other with questions, setup guidance, and sharing real-world experiences.
Our community of MSP professionals helps verify and update information. We also maintain direct research on tools and vendors to ensure accuracy. Community members can report outdated information, and we work to keep everything current.
OpenMSP was founded by Michael Assraf, who has extensive experience in the MSP industry and product leadership. As the former CEO & Founder of Vicarius, Michael grew a startup from $0 to $9M ARR with 500+ customers and deep experience working with MSPs, partners, and fundraising. OpenMSP represents his commitment to empowering the MSP community through better technology decisions and cost optimization.

Open-Source Tools & Alternatives

We assess tools based on active development, community size, documentation quality, production deployments by MSPs, and available support options. Tools must meet strict criteria for reliability and enterprise readiness.
Many open-source projects offer multiple support options including community forums, commercial support from vendors, professional services, and our community discussions where experienced MSPs share implementation guidance.