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


Meetsy is described as 'Open source online booking system' and is a appointment scheduler in the office & productivity category. There are more than 50 alternatives to Meetsy for a variety of platforms, including Web-based, SaaS, Windows, Android and iPhone apps. The best Meetsy alternative is Thunderbird Appointment, which is both free and Open Source. Other great apps like Meetsy are Cal.com, Lunacal, Morgen and Calendly.
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.




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.




Brings together calendars, to-dos, productivity apps, and schedulers in one platform. Integrates with major services like Google Calendar, iCloud, Todoist, and video conferencing tools such as Zoom. Offers native scheduling similar to Calendly, enhancing time management efficiency.




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...

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.


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.



