Best Nonprofit & Membership CRM (2026)

CiviCRM is a free, open-source constituent relationship management platform for nonprofits, NGOs, and advocacy organizations, deployable on WordPress, Drupal, Joomla, or Backdrop CMS. It centralizes donor management, membership tracking, event registration, fundraising, and email marketing in a single self-hosted system used by over 14,000 organizations globally.

ChurchCRM is a free, open-source church management system (ChMS) that runs on a standard LAMP stack, helping congregations manage member profiles, groups, attendance, events, finances, donations, and pledges without any licensing fees. It serves churches of all sizes across 45+ languages and six continents as a fully self-hosted solution.

Admidio is a free, open-source membership management system for clubs, associations, and volunteer organizations, providing member profile management, role-based access control, relationship tracking between members, event management, and document sharing in a self-hosted PHP web application. It is best suited for nonprofits and associations that need to manage member contact relationships, group structures, and communications on their own servers.