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Atomic CRM
MITAtomic CRM is an open-source alternative to HubSpot that pairs a React sales interface with Supabase and Postgres for complete data and pipeline control.
Open-source alternative to — compare it against:
Overview
A boutique software agency juggling client contracts quickly hits limits when syncing deal records with internal Postgres databases. Proprietary CRMs seal customer pipelines behind rate-limited APIs and paid tiers. Atomic CRM pairs a React and shadcn/ui sales interface with Supabase, keeping customer data and pipeline logic under your control.
Why Atomic CRM instead of HubSpot
HubSpot manages sales, marketing, and support in a hosted cloud backed by thousands of marketplace connectors. That setup works until an engineering team or ops lead needs to integrate private customer tables or trigger custom SQL workflows. In HubSpot, querying internal databases requires building private apps against restrictive REST rate limits or paying for Operations Hub. Atomic CRM runs directly on Supabase and PostgreSQL. Contacts, deals, and notes live in standard tables with Row Level Security, accessible via SQL, PostgREST, or Edge Functions.
The trade-off centers on setup effort and connector breadth. HubSpot provides turnkey connectors for Stripe, Google Workspace, and marketing suites. Atomic CRM has no one-click app store; integrating billing, telephony, or external accounting requires writing webhook handlers or TypeScript Edge Functions. For developer-led teams, this architecture eliminates integration middlemen. You can automate pipeline updates with PostgreSQL triggers, run background jobs via Edge Functions, and connect AI agents through its Model Context Protocol server.
What it does well
- Direct PostgreSQL access: Runs on Supabase, allowing ops leads to run SQL analytics and query CRM tables directly from internal services.
- Modular React frontend: Built with Vite and shadcn/ui, allowing developers to add custom fields and tweak Kanban stages in TypeScript.
- Inbound email tracking: Converts forwarded and CC'd client messages into contact notes via Supabase Edge Functions and webhooks.
- Flexible authentication: Uses Supabase Auth to provide Single Sign-On through Google, Azure, Keycloak, or Auth0 with Row Level Security.
- Native AI tooling: Includes an MCP server that lets external AI assistants inspect pipelines, summarize notes, and plan tasks.
- Updates via Shadcn registry: Pulls upstream improvements via CLI registry commands without overwriting local component modifications.