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


FreeBusy is described as 'Online scheduling assistant to coordinate meetings 10x faster with contacts inside and outside your company. Works with all calendars (Google, Office 365, Exchange, iCloud, Yahoo, etc). Works on web, smartphone, desktop, using voice, chat, and email' and is a appointment scheduler in the office & productivity category. There are more than 25 alternatives to FreeBusy, not only websites but also apps for a variety of platforms, including SaaS, iPhone, Android and Google Chrome apps. The best FreeBusy alternative is Thunderbird Appointment, which is both free and Open Source. Other great sites and apps similar to FreeBusy are Cal.com, Doodle, Calendly and TidyCal.
Thunderbird Appointment makes it easy to find a time to meet. So you can ditch the admin and streamline your day.


Open-source scheduling tool offering self-hosted or hosted deployment, complete white-label branding, API-driven customization, data ownership, online booking management, flexible embedding, privacy, and integration for business meetings, seminars, and more.




Doodle is the worlds leading online scheduling tool with a rapidly growing user base of more than three million unique visitors per month across the globe. It takes the pain out of finding the right date and time for a group of people to meet and makes scheduling virtually...



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.




Topmate is a tool that connects creators and experts with their audience through one-on-one sessions, allowing users to share knowledge and monetize their time. Users create a personal link, list services, set availability, and establish charges, which followers can use to book...




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!



Undock is a scheduling platform that integrates with Gmail, Outlook 365, Superhuman, LinkedIn, and Twitter. It functions as a calendar assistant, allowing you to share times or your entire calendar. It also enables instant meeting scheduling without checking your calendar.




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



