Free Open Source HR Software

What Free Actually Means

In the open source world, "free" has two meanings that both apply to HR software. Free as in freedom means the source code is available, modifiable and redistributable under an open source license. Free as in cost means there is no licensing fee, no subscription and no per-employee charge.

Both forms of free matter for HR software specifically. Freedom means your organization can audit the code that handles social security numbers, salary data and personal employee information. Cost freedom means a 500-person company pays the same infrastructure cost as a 50-person company, since there is no per-seat pricing that scales with headcount.

However, free does not mean zero cost. Every software deployment requires infrastructure (a server), configuration (adapting the system to your organization's policies), data migration (importing employee records), training (teaching HR staff and employees to use it) and ongoing maintenance (updates, backups, troubleshooting). These costs exist whether you use open source or commercial software, but with open source, you trade the vendor's subscription fee for internal labor or consultant fees.

The distinction that matters most: with open source HR software, your costs are fixed and predictable regardless of employee count. With SaaS, costs scale linearly with every new hire. This makes open source increasingly advantageous as organizations grow.

Truly Free HR Platforms

Not every HR platform that claims to be free actually delivers complete functionality without payment. Some use an open-core model where the free edition is deliberately limited to push organizations toward paid tiers. Here are the platforms where the free edition is genuinely useful for production HR management.

Frappe HR

Frappe HR is the most complete free HR platform available. Every feature, including payroll, recruitment, onboarding, attendance, leave management, performance appraisals, expense claims, training and employee self-service, is included in the open source edition under GPL v3. There are no gated features, no premium modules and no artificial limitations.

The only paid option from Frappe Technologies is managed hosting on Frappe Cloud, which is a convenience offering for organizations that prefer not to manage their own servers. Self-hosting on your own infrastructure makes Frappe HR completely free beyond infrastructure costs. A cloud VPS capable of running Frappe HR for a 200-person company costs between $20 and $50 per month from providers like Hetzner or DigitalOcean.

Frappe HR requires Python, MariaDB and the Frappe Bench toolchain. The setup is more involved than PHP-based alternatives, but Frappe Bench automates most of the installation process. Organizations with Python developers on staff will find customization and extension straightforward.

OrangeHRM Starter

OrangeHRM Starter is the open source edition of the world's most widely deployed HR platform. Licensed under GPL v2, it includes core HR (employee information management, organizational structure), leave management, time and attendance tracking, and recruitment with applicant tracking.

The Starter edition is genuinely useful for organizations that need core HR functionality without payroll processing. It handles the daily operations that HR departments spend most of their time on: tracking employee information, processing leave requests, managing attendance records and coordinating recruitment pipelines.

The open-core limitation to be aware of: payroll, performance management, mobile access and some advanced reporting features require the commercially licensed Advanced or Enterprise editions. If you need these features, either budget for the upgrade or pair OrangeHRM Starter with separate open source tools for those functions.

OrangeHRM is the easiest free HR platform to install. It runs on any standard PHP/MySQL hosting environment, and the web-based installer walks through the entire setup in minutes.

IceHrm (Open Source Edition)

IceHrm's open source edition is licensed under Apache 2.0 and includes employee management, leave tracking, time and attendance, recruitment, training management, travel management, document management and expense tracking. The Apache license is notably permissive, allowing organizations to modify and redistribute the software without copyleft obligations.

IceHrm is designed for private cloud deployment with a clean REST API architecture. The open source edition is feature-complete for core HR operations. The commercial cloud-hosted version adds automated backups, SSL management and support but does not gate any HR features behind payment.

Installation runs on PHP with MySQL or MariaDB, similar to OrangeHRM. The setup process is straightforward and well-documented.

Horilla

Horilla provides a full HR suite under an open source license, built with Python and Django. Modules include recruitment, onboarding, attendance, leave management, payroll, performance management, asset tracking and offboarding. All features are available in the free edition.

Horilla's modern interface is its most visible advantage over older platforms. The card-based design, contextual menus and responsive layout provide a user experience closer to commercial SaaS products. For organizations where employee adoption matters (which is most organizations), this polish can make a meaningful difference in how willingly staff use the self-service features.

Sentrifugo

Sentrifugo is completely free and includes employee management, leave, appraisals, time management, recruitment, service requests, analytics, expenses and background checks. There is no commercial edition or paid tier. Everything Sentrifugo offers is available for free.

The trade-off is that Sentrifugo's development has slowed significantly. The platform works and is stable, but do not expect frequent updates or new features. For organizations that need a simple, stable HR system and are comfortable with the current feature set, Sentrifugo remains a viable option.

Hidden Costs to Plan For

While the software is free, several costs appear during deployment and operation that organizations should budget for.

Server infrastructure. A cloud VPS costs $10 to $100 per month depending on the provider and server size. On-premises servers have higher upfront costs but lower ongoing expenses. Either way, this is a fraction of what SaaS HR software costs for any company with more than a handful of employees.

SSL certificates. Let's Encrypt provides free SSL certificates, so this should cost nothing. However, some organizations require extended validation (EV) certificates for compliance, which do have annual fees.

Setup and configuration labor. Configuring leave policies, pay structures, department hierarchies, approval workflows and user permissions takes time. Budget one to three days of focused work for initial setup, depending on organization complexity. This is comparable to configuring any new HR system, open source or commercial.

Data migration. Moving employee records from spreadsheets, a legacy system or a previous HR platform requires data cleaning, format conversion and import. Simple migrations from CSV take hours. Complex migrations from legacy systems with years of payroll history may require several days of work.

Ongoing maintenance. Someone needs to apply software updates, monitor server health, maintain backups and provide user support. This can be a part-time responsibility for an IT staff member, typically one to two hours per week once the system is running smoothly.

Training. HR staff need training on administration features. Managers need training on approval workflows and team dashboards. Employees need training on self-service features. Most open source HR platforms have documentation and video tutorials, but some internal training sessions will still be needed.

Choosing the Right Free Platform

For the most complete free feature set including payroll, choose Frappe HR. Every feature is open source with no commercial upsell.

For the easiest installation and largest community, choose OrangeHRM Starter. Accept that payroll requires a separate solution or a paid upgrade.

For a modern interface and Python/Django stack, choose Horilla. The contemporary design helps with employee adoption.

For API-first architecture and permissive licensing, choose IceHrm. The Apache 2.0 license offers maximum flexibility.

For maximum simplicity with no commercial tier at all, choose Sentrifugo. Just verify that its current feature set meets your needs without depending on future development.