Open Source CRM & Support alternatives in 2026
Manage customers, sales and support without per-seat fees.
Quick comparison
Sorted by featured first, then GitHub stars as a tiebreaker — the same rule we use across the whole site.
| Tool | License | Minimum RAM | GPU | Docker | GitHub |
|---|---|---|---|---|---|
| Twenty Lightest option1-Click Deploy | AGPL-3.0 | ~1GB | — | ✅ | ★ ~24,000 |
| Discourse 100% FOSSMost popular on GitHub | GPL-2.0 | ~4GB | — | — | ★ ~43,000 |
| Odoo Lightest option1-Click Deploy | LGPL-3.0 | ~1GB | — | ✅ | ★ ~39,000 |
| ERPNext 100% FOSS | GPL-3.0 | ~2GB | — | ✅ | ★ ~24,000 |
| Chatwoot 1-Click Deploy | MIT | ~2GB | — | ✅ | ★ ~23,000 |
| Monica Lightest option100% FOSS1-Click Deploy | AGPL-3.0 | ~1GB | — | ✅ | ★ ~21,000 |
| Mautic Lightest option100% FOSS | GPL-3.0 | ~1GB | — | ✅ | ★ ~9,000 |
| Invoice Ninja Lightest option | Elastic License 2.0 | ~1GB | — | ✅ | ★ ~8,300 |
| Zammad Lightest option100% FOSS | AGPL-3.0 | ~1GB | — | ✅ | ★ ~8,000 |
| Dolibarr Lightest option | GPL-3.0 | ~1GB | — | ✅ | ★ ~6,000 |
| SuiteCRM Lightest option100% FOSS | AGPL-3.0 | ~1GB | — | ✅ | ★ ~5,000 |
| EspoCRM Lightest option1-Click Deploy | GPL-3.0 | ~1GB | — | ✅ | ★ ~3,000 |
| Krayin CRM Lightest option100% FOSS | MIT | ~1GB | — | ✅ | ★ ~2,000 |
| FreeScout Lightest option | AGPL-3.0 | ~1GB | — | ✅ | ★ ~2,000 |
| YetiForce CRM Lightest option100% FOSS | AGPL-3.0 | ~1GB | — | ✅ | ★ ~2,000 |
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Build my stackDetailed profile of each alternative
Alternative to Salesforce, HubSpot
Modern open source CRM, an alternative to Salesforce.
Alternative to Intercom, Zendesk
Omnichannel support inbox, an alternative to Intercom/Zendesk.
Alternative to Salesforce
Customizable sales CRM, an open source alternative to Salesforce.
Alternative to Salesforce
Complete enterprise CRM, a mature alternative to Salesforce.
Alternative to Zoho CRM
Lightweight CRM on Laravel, a modern alternative to Zoho CRM.
Alternative to Clay
Personal CRM for your relationships, an alternative to Clay.
Alternative to Salesforce, HubSpot
Modular enterprise suite with CRM, an alternative to Salesforce/HubSpot.
Alternative to HubSpot
Marketing automation, an open source alternative to HubSpot Marketing.
Alternative to Zendesk
Support ticketing system, a self-hostable alternative to Zendesk.
Alternative to Help Scout
Lightweight support inbox, a free alternative to Help Scout.
Alternative to Salesforce
CRM with 50+ integrated modules, a free alternative to Salesforce.
Alternative to FreshBooks, Bill.com
Invoicing and quotes with a client portal, an alternative to FreshBooks.
Alternative to Circle
Large-scale forum and community software, an alternative to Circle.
Alternative to SAP Business One, NetSuite
Full ERP suite (accounting, inventory, CRM), an alternative to SAP Business One.
Alternative to QuickBooks, Sage
Modular invoicing, accounting and stock, a lightweight alternative to QuickBooks.
Frequently asked questions
Which CRM & Support tools are 100% free?
8 out of 15 are 100% FOSS. The rest are Open-Core: the core is free, but some advanced feature may stay paid — we call it out on each tool's page.
Do I need a GPU to use these tools?
No, none of the 15 tools in this category need a GPU — they all run fine on CPU alone.
How much RAM do I need at minimum?
The lightest option on this list is Twenty, which runs on as little as 1GB of RAM — enough for a cheap VPS.