OpenSlot

About

Booking links require others to schedule appointments for you, but OpenSlot provides them with your available times instead. Simply select your participants, time zone, and scheduling window; the tool accesses Microsoft 365 free/busy data in a read-only manner without storing any information, then delivers a clear, ready-to-paste list of all shared free slots. It functions both on the web and within Outlook, allowing you to insert times into a draft email or open it on a received message and reply with availability. Your preferences for working hours, minimum slot duration, and weekend inclusion are saved. There is a free plan, a 14-day Pro trial, and no credit card is required.