Twenty CRM
Twenty CRM is an open-source customer relationship manager with a modern, keyboard-friendly interface and a flexible data model. You can define custom objects and fields, move records through pipeline, table and board views, automate routine work with workflows, and connect mail and calendar so conversations land on the right record, with a documented API for the rest.
Small sales and service teams use it to track leads, opportunities and customer history without living inside a heavyweight cloud CRM.
Self-hosting keeps your pipeline private, replaces per-seat licences with your own server, and turns the CRM into a database you control, back up and restore.