What are some alternatives?
Wild Apricot - Wild Apricot is a membership software with friendly and knowledgeable support.
Galette - Galette is a membership management web application towards non profit organizations.
Zenbership Membership Software - Open source membership software that combines event planning, CRM, a CMS, invoicing, subscription...
Membee - Membee is web-based membership management software.
TidyHQ - Organization management tool to support membership, subscriptions, event planning, and outreach.
Sheep - Membership and events for SMEs and nonprofits