Twenty
AI-native open-source CRM — customize objects, workflows, and apps like code.
AGPL-3.0 alternative to Salesforce. GraphQL/REST API, custom objects, MCP server, and Docker self-hosting — from $9/user cloud or free self-hosted.
Krayin
Self-hosted Laravel CRM for leads, pipelines, and customer lifecycle management.
MIT-licensed alternative to Salesforce. Kanban leads, quotes, email sync, and modular extensions — built on Laravel and Vue.js for SMEs and enterprises.
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.
Atomic CRM
Full-featured CRM in React + Supabase — fork and deploy in minutes.
MIT CRM by Marmelab (React Admin). Contacts, deals Kanban, tasks, email capture — ~15k LOC with shadcn/ui, deploy to Supabase + GitHub Pages.