fully functional booking system for squarespace

anybody knows a fully functional booking system for squarespace?

Hi @kasostours, 

You can add online booking to your site in a number of ways, including our built-in Scheduling Block. For more on that option and others, check out this guide:

Adding online booking to your site

As a note, some of the methods outlined in the help guide linked above may require the use of Premium features. These are features designed to meet the needs of businesses and organizations, so they're only available on our Business and Commerce plans. 

For any further questions you might have, you can reach out to Customer Support for personalized assistance at anytime.