Odoo
Modular open-source ERP — CRM, accounting, inventory, eCommerce, and 30+ business apps.
LGPL-3.0 alternative to SAP and NetSuite. Self-host the Community Edition or use Odoo Cloud — integrated apps for sales, operations, finance, and HR.
Ever Gauzy
Open business platform — ERP, CRM, HRM, ATS, and PM in one stack.
AGPL-3.0 alternative to Odoo for agencies and freelancers. NestJS + Angular, multi-tenant, time tracking, invoicing, and MCP server with 323+ AI tools.
Frappe CRM
Fully featured open-source CRM — unlimited users, Frappe-powered.
AGPL-3.0 alternative to HubSpot from the ERPNext team. Lead/deal pipeline, SLA rules, email integration, and Vue.js UI — Frappe Cloud or Docker self-hosting.
Open Mercato
AI-engineering framework for CRM/ERP — start at 80% done.
MIT modular monolith with pre-built CRM, sales, and ERP modules. Architecture-aware AI harness, multi-tenant RBAC, and spec-first development for Cursor/Claude Code.