If you are looking for a platform that is "open source" in the traditional sense (fully free community editions), consider these alternatives: Bitrix24 On-Premise Edition
Bitrix24 is unique in the business software market because it offers a powerful that provides full access to its open-source code . While the cloud version is a proprietary SaaS product, the "Bitrix24 Open Source" (On-Premise) edition allows companies to modify the software’s interface, logic, and integrations to meet highly specific business requirements. The Two Faces of Bitrix24: Cloud vs. Open Source bitrix24 open source
The self-hosted edition is preferred by large enterprises and businesses with strict security or customization needs for several reasons: If you are looking for a platform that
Understanding the difference is critical for developers and IT managers: Open Source The self-hosted edition is preferred by
Time tracking, employee directories, and an eLearning module for internal training.
With access to the source code, PHP, and JavaScript, you can change the UI to match your corporate branding or develop entirely new modules.