Peter E. for pure CRM I've been loving Twenty, it's open source/free, well architected with a modern UI that looks and feels like Attio/Notion, and a ton of customization capability (custom modules, fields, workflows, email integration)... i'd wager it can take folks quite a ways at zero cost before they really start needing more, and if they do, can probably claude code it to taste (fyi i am not affiliated with Twenty in any way shape or form, just a happy user)