Go to Demo Page Free best CRM Software EspoCRM is an Open Source CRM (Customer Relationship Management) software that allows you to see, enter and evaluate all your company relationships regardless of the type. People, companies or opportunities - all in an easy and intuitive interface. It's a web application with a frontend designed as a single page application and REST API backend written in PHP. Download the latest release from our website. Requirements PHP 7.3 and later (with pdo, json, gd, openssl, zip, imap, mbstring, curl extensions); MySQL 5.7 (and later), or MariaDB 10.1 (and later).