Hi Product Hunt! Kjell here 👋 Munin is an open-source, headless alternative to HubSpot – CRM, shared inbox, outreach, CMS, knowledge base and analytics, all on one backend. It started as a side project earlier this year. I needed to run some cold outreach on another project, HubSpot felt like overkill (and pricey), so I hacked something together with Claude + Gmail + a Google Sheet + Apps Script. It worked, but it got messy fast, and managing contacts in a spreadsheet isn't fun. So I decided to build the thing properly, once and for all – and make it fully open source (MIT). What makes it different: it's headless. Instead of clicking through endless screens, everything runs through MCP tools. Munin ships a built-in agent that handles live conversations and routine curation out of the box, and you bring your own agents (Claude, Cursor, ChatGPT…) alongside it for the rest – they all drive the same tools. There's still a thin dashboard for settings and human-in-the-loop review, so a person approves anything that actually matters. You can self-host it (docker compose up) or spin up the cloud free tier in a few minutes, no card. It's still early in places, and I'd genuinely love your feedback – product or tech.

Munin

The open-source customer platform for the agentic era

The open-source customer platform for the agentic era