Alternatives / Attio
Looking for an open source Attio alternative? We compared 13 open source CRMs and business suites by license, self-hosting, customization, AI features, and pricing. They range from modern customizable CRMs to full ERP suites and developer toolkits.
Written by Maxime DERAME
Last updated:
| Alternative | Best for | License |
|---|---|---|
| Twenty | Closest modern open-source CRM | AGPL-3.0 + commercial files |
| CRM (trycompai) | AI agents that fill the CRM from your inbox | MIT |
| Macro Docs | CRM with email, chat, and docs | AGPL-3.0 |
| Relaticle | Self-hosted CRM with MCP tools | AGPL-3.0 |
| Krayin CRM | Laravel CRM for sales teams | MIT |
| Frappe CRM | Simple CRM with ERPNext integration | AGPL-3.0 |
| EspoCRM | Mature, refined CRM | AGPL-3.0 |
| Atomic CRM | Building a custom CRM | MIT |
| Warpdrive | Business development pipelines | MIT |
| Odoo | ERP with CRM | LGPL-3.0 (Community) |
| ERPNext | Full open-source ERP | GPL-3.0 |
| Erxes | Marketing, sales, and support platform | AGPL-3.0 + EE |
| Ever Gauzy | ERP, CRM, HR, and projects | AGPL-3.0 (Community Edition) |
We looked for open-source tools that overlap with Attio's core: managing contacts, companies, and deals with customizable data models and automation. We verified each project's license, recent activity, stars, and self-hosting in its repository. Attio is a modern, flexible CRM, so we separate focused CRMs from broader ERP suites and flag open-core and commercially restricted licenses. See our methodology for the full criteria.
Twenty, CRM, Relaticle, Krayin, Frappe CRM, EspoCRM, Warpdrive, and Macro are CRMs. Odoo, ERPNext, Erxes, and Ever Gauzy are broader business suites where CRM is one module among accounting, inventory, or HR. Atomic CRM is a developer toolkit for building your own CRM rather than a ready-made product.
Twenty is the closest modern alternative, with fully customizable data models, no-code workflows, and an MCP server. CRM and Relaticle focus on AI agents: CRM creates records from your inbox and enriches them, and Relaticle exposes 37 MCP tools to external agents. Macro combines CRM with email, chat, and documents.
Twenty is mostly AGPL-3.0, but some files are under a commercial license. Odoo Community is LGPL-3.0, while Enterprise is proprietary. Erxes is AGPL-3.0 outside its enterprise directory and forbids offering it as a competing SaaS. ERPNext is GPL-3.0, Frappe CRM, EspoCRM, Relaticle, and Macro are AGPL-3.0, and CRM, Krayin, Atomic CRM, and Warpdrive are MIT. Ever Gauzy's Community Edition is AGPL-3.0, with commercial editions available.
Twenty offers an MCP server and AI coding support, Relaticle has a built-in AI assistant with an MCP server, CRM builds agents from natural-language workflow descriptions, and Macro integrates AI agents in its shared workspace. Odoo adds AI document processing.
All thirteen projects were updated within weeks of this update. Warpdrive and Relaticle are young, Warpdrive in particular with only a few dozen stars, so check their maturity before relying on them.
Attio is a proprietary CRM sold per seat, with your customer data stored on its servers and limits on customization and automation by plan. Open-source alternatives let you self-host customer data, build custom data models, avoid per-seat pricing, and connect AI agents through APIs and MCP, at the cost of running the system yourself and fewer polished integrations.
| Alternative | Type | License | Self-hosted | Best for |
|---|---|---|---|---|
| CRM (trycompai) | AI CRM | MIT | Yes | Automatic record creation |
| Macro Docs | Collaborative CRM | AGPL-3.0 | Yes | Teams with email and docs |
| Odoo | ERP suite | LGPL-3.0 (Community) | Yes | Integrated business apps |
| Twenty | CRM | AGPL-3.0 + commercial files | Yes | Technical teams |
| ERPNext | ERP suite | GPL-3.0 | Yes | Comprehensive business management |
| Krayin CRM | CRM | MIT | Yes | B2B and real estate |
| Ever Gauzy | Business platform | AGPL-3.0 (Community) | Yes | ERP, CRM, HR, and projects |
| Frappe CRM | CRM | AGPL-3.0 | Yes | Simplicity and ERPNext |
| Erxes | Growth platform | AGPL-3.0 + EE | Yes | Marketing, sales, and support |
| EspoCRM | CRM | AGPL-3.0 | Yes | Mature CRM |
| Atomic CRM | CRM toolkit | MIT | Yes | Developers |
| Relaticle | AI CRM | AGPL-3.0 | Yes | Data control and MCP |
| Warpdrive | Pipeline CRM | MIT | Yes | Business development |
Want the closest modern open-source CRM
Twenty offers customizable data models, no-code workflows, an MCP server, and self-hosting, with a paid cloud option.
Want AI to fill and enrich your CRM
CRM reads team inboxes to create contacts and companies, enriches them, schedules follow-ups, and builds agents from plain-language descriptions.
Want a CRM that agents can use
Relaticle has a built-in AI assistant, 37 MCP tools, a REST API, and custom fields, with no per-seat pricing.
Want CRM joined with email, chat, and docs
Macro integrates a pipeline, contact timeline, email, chat, and documents in one shared workspace.
Want a full ERP with CRM
ERPNext covers accounting, inventory, HR, CRM, manufacturing, and projects under GPL-3.0.
Want a mature, polished CRM
EspoCRM offers contacts, accounts, opportunities, pipelines, and workflows with flexible self-hosted or cloud deployment.
Want to build a custom CRM
Atomic CRM is a React, TypeScript, and Supabase toolkit with contacts, tasks, a Kanban board, and email-to-note conversion.
Run a small business development pipeline
Warpdrive provides a pipeline board, deal workspace, contacts, and two-way Gmail, running on your own server with Docker Compose.