OSI-licensed only · self-hostable
Zoho is a proprietary suite of business apps: CRM, accounting, projects, marketing, support and more. No single open-source project matches the whole catalogue, but ERP suites and focused tools cover the main apps.
Every tool below is under an OSI-approved licence (LGPL-3.0, GPL-3.0, AGPL-3.0, MIT), checked against its repository; some have separately licensed enterprise parts. Akaunting and Invoice Ninja, often called open source, are listed separately.
Licences checked against each repository on November 7, 2026.
| Tool | Best for | Licence | Runs as |
|---|---|---|---|
| Odoo | All-in-one suite closest to Zoho One | LGPL-3.0 | Server |
| ERPNext | Open-source ERP and accounting | GPL-3.0 | Docker |
| EspoCRM | Straightforward self-hosted CRM | AGPL-3.0 | Docker |
| Frappe CRM | Simple affordable CRM | AGPL-3.0 | Docker |
| Twenty | Modern, customisable CRM | AGPL-3.0 | Docker |
| Mautic | Marketing automation | GPL-3.0 | Server |
| Krayin CRM | Laravel-based CRM | MIT | Server |
| Plane | Project management | AGPL-3.0 | Docker |
Best for: All-in-one suite closest to Zoho One
A suite of web-based open source business apps including CRM, website builder, eCommerce, project management and manufacturing, usable standalone or as an ERP.
Best for: Open-source ERP and accounting
A 100% open-source ERP covering accounting, order management, manufacturing, assets and projects.
Best for: Straightforward self-hosted CRM
A free, open-source CRM platform for storing and managing leads, contacts, opportunities and support cases.
Best for: Simple affordable CRM
A simple open-source CRM with kanban views, custom views and an all-in-one lead/deal page, built on the Frappe Framework.
Best for: Modern, customisable CRM
Describes itself as the open alternative to Salesforce, a toolkit to build a CRM with objects, views and workflows. Enterprise-marked files use a commercial licence.
Best for: Marketing automation
Open source marketing automation software that you can self-host and customise.
Best for: Laravel-based CRM
A fully open-source CRM framework built with Laravel and Vue.js under the MIT licence.
Best for: Project management
A self-hostable, open-source project management tool for issues, sprints and roadmaps.
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| If you need… | Start with |
|---|---|
| Replacing the whole Zoho suite | Odoo |
| ERP and accounting | ERPNext |
| A focused CRM | EspoCRM, Frappe CRM or Twenty |
| Email marketing automation | Mautic |
| Project tracking | Plane |
Public source code, but under licences the Open Source Initiative doesn't approve. Fine to use; read the terms first.
The README says it is released under the BSL licence; source is public but this is not an OSI-approved licence.
The README calls it a source-available app; the Elastic License is not OSI-approved.
Quick answers to common questions
No, Zoho's products are proprietary.
EspoCRM and Frappe CRM are focused CRMs, and Twenty is a modern option.
Odoo is the closest suite, with ERPNext as another.
No, its README says it is released under a BSL licence, which is not OSI-approved.
Odoo, Twenty and others have paid or separately licensed parts. Check each repo.
List it on TechLogHub and we'll review it for this page.
