Alternatives to: Calendly

Cal.com: The better way to schedule your meetings, offering a fully customizable experience for individuals and businesses.

Easy!Appointments is a self-hosted, Open Source appointment scheduler.

GRR is an Open Source resource management and reservation tool offering a user-friendly interface for efficient scheduling and booking.

Meetergo automates meeting scheduling, eliminating email exchanges and offering powerful features for individuals and businesses.

Open Web Calendar is a customizable, Open Source web calendar that embeds into websites using ICS links, ensuring privacy and broad compatibility.