CiviCRM is a web-based, open source, internationalized suite of software for constituency relationship management, that falls under the broad rubric of customer relationship management. Developed by CiviCRM
License: Open Source
CiviCRM is a powerful open-source CRM designed for non-profits, offering extensive customization and integration options, while Highrise is a simpler, more user-friendly CRM suited for small to medium businesses, focusing on ease of use rather than extensive features.