Bookly doesn't specifically offer a free trial for its Pro version, but there is a free version of the Bookly plugin available. This free version allows you to explore many of the basic functionalities and get a feel for how Bookly works. It's a good starting point to evaluate the core capabilities of the plugin.
If you find that you need more advanced features, such as an unlimited number of staff members and services, online meetings, Google Calendar sync, and various integrations, you can consider upgrading to Bookly Pro or one of the Bookly bundles.
You can create and set up a personal free sandbox to test out Bookly and the add-ons.