Best Open Source CRM Software in 2026
Best Open Source CRM Software in 2026
Salesforce costs $25-330/user/month. HubSpot Sales starts at $20/user/month. Here are the best open source CRM tools that give you contact management, deal pipelines, and sales automation — self-hosted.
Quick Comparison
| Tool | Best For | License | Stars | Self-Host |
|---|---|---|---|---|
| Twenty | Modern HubSpot alt | AGPL-3.0 | 22K+ | Docker |
| EspoCRM | Established, flexible | AGPL-3.0 | 1.7K+ | Docker |
| Erxes | All-in-one platform | AGPL-3.0 | 3.5K+ | Docker |
| SuiteCRM | Salesforce replacement | AGPL-3.0 | 4.5K+ | Docker |
| Monica | Personal relationships | AGPL-3.0 | 21K+ | Docker |
Detailed Breakdown
Twenty — Best Modern CRM
Replaces: HubSpot CRM, Pipedrive
- Notion-like UI with customizable objects
- Contacts, companies, deals, tasks
- Email integration
- Custom fields and objects
- GraphQL API
- Timeline and activity tracking
- Import/export (CSV)
- Modern TypeScript/React codebase
Strengths: Beautiful, modern UI. Fastest-growing OSS CRM. Highly customizable data model.
Best for: Startups and SMBs who want a clean, modern CRM without enterprise bloat.
EspoCRM — Most Mature
Replaces: HubSpot, Salesforce Essentials
- Contacts, accounts, leads, opportunities
- Email integration (IMAP)
- Calendar and scheduling
- Workflow automation
- Custom entities and fields
- Reporting and dashboards
- Portal for clients
- VoIP integration
- 14+ years of development
Strengths: Most feature-complete OSS CRM. Stable, well-documented, production-proven.
Best for: Sales teams who need a full-featured CRM with workflow automation.
Erxes — All-in-One Platform
Replaces: HubSpot (full stack), Salesforce + Mailchimp
- CRM + marketing + customer support
- Email marketing and automation
- Live chat widget
- Knowledge base
- Form builder
- Segments and automation
- Dashboard and reporting
Strengths: Combines CRM, marketing, and support in one platform.
Best for: Businesses who want CRM + marketing automation in a single tool.
SuiteCRM — Enterprise Salesforce Alternative
Replaces: Salesforce
- Full CRM suite (contacts, accounts, leads, opportunities, cases)
- Workflow automation
- Reporting with charts
- Campaign management
- Portal
- REST API
- Outlook and Thunderbird plugins
Strengths: Most comprehensive Salesforce alternative. Enterprise-ready with deep customization.
Best for: Large organizations migrating from Salesforce who need feature parity.
Monica — Personal CRM
Replaces: Nothing commercial (unique category)
- Track personal relationships
- Log interactions, gifts, activities
- Reminders for birthdays and events
- Journal entries
- Contact details and notes
- Family relationships
- Debt tracking
Strengths: Purpose-built for personal relationship management, not sales.
Best for: Individuals who want to be more intentional about personal relationships.
Choosing the Right Tool
| Need | Choose |
|---|---|
| Modern, clean CRM | Twenty |
| Full-featured sales CRM | EspoCRM |
| CRM + marketing + support | Erxes |
| Salesforce migration | SuiteCRM |
| Personal relationships | Monica |
| Startup (small team) | Twenty |
| Enterprise (large team) | SuiteCRM or EspoCRM |
Cost Savings
| Team Size | Salesforce Essentials | Self-Hosted (Twenty) | Annual Savings |
|---|---|---|---|
| 5 users | $1,500/year | $96/year (VPS) | $1,404 |
| 20 users | $6,000/year | $192/year (VPS) | $5,808 |
| 50 users | $15,000/year | $192/year (VPS) | $14,808 |
Compare all CRM tools on OSSAlt — features, integrations, and self-hosting options side by side.