The best open source alternative to Zoho is Odoo. If that doesn't suit you, we've compiled a ranked list of other open source Zoho alternatives to help you find a suitable replacement. Other interesting open source alternatives to Zoho are: Tuta and ONLYOFFICE Docs.
Zoho alternatives are mainly CRM Systems but may also be ERP Systems or Encrypted Communication Tools. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Zoho.
Comprehensive ERP solution offering integrated modules for finance, HR, sales, inventory, and more, tailored for businesses of all sizes.

Odoo is a powerful, open-source business management platform that revolutionizes how companies operate. This versatile suite of applications seamlessly integrates various business functions, providing a unified solution for organizations across industries.
Key benefits of Odoo include:
Whether you're managing finances, streamlining operations, or boosting sales, Odoo provides the tools you need to succeed in today's competitive business landscape.
Looking for open source alternatives to other popular services? Check out other posts in the alternatives series and openalternative.co, a directory of open source software with filters for tags and alternatives for easy browsing and discovery.
Tuta offers encrypted email, calendar and contacts with quantum-resistant security, protecting your privacy without ads or tracking.

Tuta is a secure communication platform that provides end-to-end encrypted email, calendar, and contacts.
Key features:
Tuta uses renewable energy to power its services, demonstrating a commitment to sustainability. The platform is trusted by thousands of businesses, including financial institutions and human rights organizations, to safeguard sensitive communications.
With Tuta, you can take back control of your data and enjoy private, secure communication without compromising on features or ease of use. Whether for personal or business use, Tuta provides a comprehensive solution for those who value their digital privacy and security.
Open-source online editor for documents, spreadsheets, presentations, and PDFs. Features real-time collaboration, AI integration, and accessibility tools.

ONLYOFFICE Docs is a comprehensive online office suite that handles all your document editing needs in one powerful platform. Create and edit text documents, spreadsheets, presentations, PDFs, and fillable forms with professional-grade tools and features.
Key Features:
Security & Privacy:
Flexible Deployment Options:
The platform includes ready-made templates to get started quickly and offers dark theme support for comfortable work in any environment. Whether you're working solo or with a team, ONLYOFFICE Docs provides the tools you need for professional document creation and collaboration.