Open-source Microsoft Bookings alternative: Cal.com
Updated 7/19/2026
Microsoft Bookings comes tied to a 365 license. If you want an independent booking page under your own brand, you have two excellent open-source alternatives.
Cal.com
Cal.com is the modern Calendly alternative: booking links, meeting types, team round-robin, calendar integrations and full customization. It runs on your server, with client data in your infrastructure.
Easy!Appointments
Easy!Appointments is a lightweight booking solution with Google Calendar sync and a public self-service page for clients. Simple and fast to set up.
Who it is for
Ideal for clinics, salons, consultants or any business that takes online bookings and wants control over the data and the brand experience.
How to start
Pick Cal.com or Easy!Appointments from the one-click app catalog. A small plan is enough; then connect your own domain for the booking page.
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