Best alternatives to Atomic CRM in 2026

A lot of small teams don't need a heavyweight CRM with hundreds of unused features — they need contacts, a deal pipeline, notes, and reminders, without a steep learning curve or a per-seat bill that scales out of control. Atomic CRM is exactly that: a clean, modern CRM you can either run yourself for free, or run as a small paid hosted service if you'd rather not manage a server. Atomic CRM is an open-source CRM built on React, shadcn/ui (via react-admin/shadcn-admin-kit), and Supabase, published by Marmelab, the French agency behind the widely used React-Admin framework. It covers standard CRM ground — contact management, task creation with reminders, notes, email-to-note capture, a Kanban-style deal pipeline, data import/export — plus developer-oriented extras: a REST API, an MCP server for AI-agent integration, SSO via Google/Azure/Keycloak/Auth0, and a mobile app. It's MIT-licensed, self-hostable (Docker supported) with over 1,200 GitHub stars and active development (1,600+ commits), and also ships as a small hosted commercial service — Starter at €25/month for 1,000 contacts, Team at €50/month for 10,000 contacts, and custom Enterprise pricing — for teams that want the same product without running their own Supabase instance.