OSI-licensed open source
A multi-tenant CRM serves several isolated customers, brands or business units from one deployment, each with separate data, users and settings. Few open-source CRMs ship true tenant isolation out of the box; most offer workspaces, teams or multi-company modes, or can be deployed per tenant with containers.
This page lists seven open-source CRMs and notes how each handles separation. Treat it as a starting shortlist: confirm isolation in the project's documentation for your compliance needs. Licences were read from repositories, and AGPL or LGPL terms matter if you resell hosting.
Tools, licences and pricing checked against vendor and repository pages on November 7, 2026.
| Tool | Best for | Pricing | Licence |
|---|---|---|---|
| Twenty | Teams wanting a modern, workspace-based CRM | Free, open source (self-hosted); cloud plans, see vendor pricing | AGPL-3.0 |
| SuiteCRM | Full-featured CRM per tenant deployment | Free, open source (self-hosted); hosted options, see vendor pricing | AGPL-3.0 |
| EspoCRM | Customizable CRM | Free, open source (self-hosted); cloud and extensions, see vendor pricing | AGPL-3.0 |
| Odoo Community | Multi-company setups inside one suite | Community edition free; Enterprise and online plans, see vendor pricing | LGPL-3.0 |
| Krayin CRM | PHP and Laravel teams | Free, open source | MIT |
| Corteza | Low-code CRM customization | Free, open source | Apache-2.0 |
| Frappe CRM | Frappe and ERPNext users | Free, open source (self-hosted); cloud plans, see vendor pricing | AGPL-3.0 |
Best for: Teams wanting a modern, workspace-based CRM · Free, open source (self-hosted); cloud plans, see vendor pricing
Modern open-source CRM built around customizable objects and workspaces, with a hosted cloud and self-hosting.
Best for: Full-featured CRM per tenant deployment · Free, open source (self-hosted); hosted options, see vendor pricing
Open-source CRM with sales, marketing and support modules, widely self-hosted.
Best for: Customizable CRM · Free, open source (self-hosted); cloud and extensions, see vendor pricing
Open-source CRM with entity manager, workflows and an API, available self-hosted or cloud.
Best for: Multi-company setups inside one suite · Community edition free; Enterprise and online plans, see vendor pricing
Open-source business suite with a CRM app and multi-company support within one database.
Best for: PHP and Laravel teams · Free, open source
Open-source Laravel CRM with lead and pipeline management.
Best for: Low-code CRM customization · Free, open source
Low-code open-source platform with a CRM app built on a customizable data and workflow engine.
Best for: Frappe and ERPNext users · Free, open source (self-hosted); cloud plans, see vendor pricing
Open-source CRM from Frappe with a modern interface, integrating with the Frappe ecosystem.
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| If you need… | Start with |
|---|---|
| Modern workspace-based CRM | Twenty |
| Full feature set, one instance per tenant | SuiteCRM or EspoCRM |
| Multi-company inside a suite | Odoo Community |
| Low-code customization | Corteza |
| PHP/Laravel stack | Krayin CRM |
| You use ERPNext | Frappe CRM |
Quick answers to common questions
Rarely natively; most use workspaces, multi-company modes or separate instances per tenant.
One deployment and database per tenant, using containers, gives the strongest separation.
If you modify AGPL software and offer it over a network, you must provide source; review each licence.
Odoo offers multi-company inside one database; confirm CRM coverage for your version.
Several vendors sell hosting; see their pricing pages.
List it on TechLogHub and we'll review it for this guide.
