Atomic CRM: Open Source Alternative to Salesforce

Atomic CRM is a full-featured open-source CRM with 1k+ GitHub stars — an MIT alternative to Salesforce built by Marmelab (creators of React Admin). React, shadcn/ui, and Supabase — fork, customize, and deploy in minutes.

Compare Atomic CRM with HubSpot and Zoho CRM before you choose your stack.

Key features

CRM features

• Contact and company management with tags
• Deal pipeline with Kanban board
• Tasks, notes, and activity timeline
• Email capture via inbound Edge Functions
• Sales dashboard and reporting

Developer experience

• ~15,000 LOC — small, readable codebase
• shadcn-admin-kit + ra-core (headless React Admin)
• React 19, TypeScript, Vite, Tailwind CSS v4
• AGENTS.md for AI-assisted customization
• Vitest for unit testing

Deployment

• Local dev with make install && make start (Supabase via Docker)
• Deploy backend to Supabase.com, frontend to GitHub Pages
• Self-host Supabase for full data sovereignty
• SAML 2.0 SSO available

Atomic CRM vs Salesforce

	Atomic CRM	Salesforce
License	MIT (open source)	Proprietary
Models	Bring your own keys / local models	Vendor-locked models
Deployment	Self-hosted or cloud	SaaS only
Privacy	Data stays on your infrastructure	Processed by vendor
Cost	Free software + API usage	Subscription pricing

Choose Atomic CRM if you want open-source code, self-hosting options, and full control over your data and deployment.

Choose Salesforce if you prefer a managed proprietary product with vendor support and minimal setup.

Browse more open-source alternatives to Salesforce, or explore other tools in Developer Tools.

At a glance

License	MIT
Stack	React, TypeScript, Supabase, PostgreSQL, Tailwind CSS
Self-hosted	Yes — Supabase self-hosted or cloud
Cloud	Supabase managed
Author	Marmelab (React Admin)

Getting started

git clone https://github.com/marmelab/atomic-crm.git
cd atomic-crm && make install && make start

Live demo at marmelab.com/atomic-crm-demo.

FAQ

Is Atomic CRM a free alternative to Salesforce?

Yes. Atomic CRM is open source under MIT. You can self-host it at no software cost — you only pay for infrastructure or optional managed services.

How does Atomic CRM compare to Salesforce?

Atomic CRM gives you source code access, self-hosting, and data ownership. Salesforce is a proprietary product focused on managed convenience. See the comparison table above for a side-by-side breakdown.

Can I self-host Atomic CRM?

Yes. Atomic CRM supports self-hosted deployment, which is a core reason teams choose it over Salesforce. Check the Getting started or Self-hosting section for install commands.

Is Atomic CRM suitable for production?

Atomic CRM is actively maintained with a strong open-source community. Many teams run it in production as a Developer Tools alternative to Salesforce. Review the At a glance table for license and stack details.

What are alternatives to Atomic CRM and Salesforce?

Browse alternatives to Salesforce for more open-source options, including tools compared to HubSpot. Explore the full Developer Tools category for related projects.