Thunderbird Appointment makes it easy to find a time to meet. So you can ditch the admin and streamline your day.


The best Appointment Scheduler alternative to Cal.com is Thunderbird Appointment, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Cal.com and many of them are Appointment Schedulers so hopefully you can find a suitable replacement. Other interesting Appointment Scheduler alternatives to Cal.com are Notion Calendar, Lunacal, Calendly and TidyCal.
Thunderbird Appointment makes it easy to find a time to meet. So you can ditch the admin and streamline your day.


Experience a fully integrated calendar with Notion, syncing events from Google Calendar, offering built-in scheduling, time zone support, and the ability to connect multiple accounts. Manage all events, personal and work, with a modern design, light and dark modes, and Lock Screen support for iOS 17.




Cloud-based scheduling platform featuring customizable booking pages, synchronization with major calendars, automated SMS and email reminders, team scheduling, support for paid sessions, location and service management, CRM connectivity, and GDPR compliance.




Calendly can connect with up to six of your calendars to automatically check availability and help you connect with your best contacts, prospects and clients.




Web-based scheduling platform offering unlimited meeting booking types, seamless calendar, video conferencing, and payment integrations, cross-timezone support, easy setup, embeddable booking pages, API automations, mobile-friendly interface, and notifications.




Easy!Appointments is a highly customizable web application that allows your customers to book appointments with you via the web. Moreover, it provides the ability to sync your data with Google Calendar so you can use them with other services.




Automated AI assistant interprets email requests to handle scheduling tasks, coordinates and optimizes meetings, updates calendar availability in real time, and minimizes manual effort for professionals needing efficient, dynamic calendar management.


A booking experience your clients will love. For small businesses, first impressions matter. YouCanBookMe is the most personalized meeting scheduler you can use to build your business. Bookers can overlay their availability to find the best time to meet. Powered by Capacity.




zcal is all-in-one scheduling solution built for speed. It’s beautiful, easy to use, and fully integrated with Google, Office 365, and Outlook calendars. Sign up for free today!



Microsoft Bookings, part of select Microsoft 365 Copilot plans, is a simpler way to organize schedules and manage appointments.




Check out Calday for the most flexible appointment scheduling app for service-based business! Easily manage your appointments with hassle-free scheduling.




Rise Calendar is a state-of-the-art scheduling tool that utilizes a Scheduling Engine to pinpoint the best times for meetings and tasks that require concentration. Its unique focus blocks feature progressively limits access to your calendar as it becomes fuller, protecting your...



