SuperSaaS is a web-based appointment and reservation system for individuals, small businesses and organisations. Users set their own availability, booking rules, cancellation policies and classes with capacity limits, and offer waiting lists, customisable booking pages and forms, and branded confirmations and reminders by email or SMS. Payments run through providers such as PayPal and Stripe, and there are integrations with Google Calendar, Outlook, Zoom, Google Meet and WordPress. The schedule can be shared as a link or embedded in a website. It is delivered as SaaS.
SuperSaaS is based in Amsterdam and was founded in 2006. According to the vendor, all customer information is stored on servers within the European Union, in a data centre with round-the-clock monitoring and backups to two separate locations. The software is not open source. For a European organisation this means a Dutch vendor with EU hosting. The pages consulted do not name the hosting provider, so ask if that matters for your assessment.