OwnerRez is a robust Property Management System (PMS) designed for vacation rental owners and property managers. It provides an all-in-one platform that handles various operational tasks such as booking management, guest communication, invoicing, and reporting. It has an extensive range of integrations with popular Online Travel Agencies (OTAs) like Airbnb, Booking.com, Vrbo, and others, enabling easy synchronization of bookings and calendars across multiple platforms.

Cassandra is a free and open-source, distributed, wide-column store, NoSQL database management system designed to handle large amounts of data across many commodity servers, providing high availability with no single point of failure.