Cal.com: clients pick their own slot, you stop the emailing.

Yes, with both, and with CalDAV too, the open protocol that the Nextcloud calendar uses among others. Cal.com checks your calendar for busy times and writes new appointments back into it. If your team is spread over more than one kind of calendar, that works as well; at set-up we look at what you want to link.

For scheduling appointments it can: a booking page, team pages, confirmations and reminders, linked to your calendar. The difference is that your own installation runs on hardware of ours. Some features the maker sells only under a commercial licence. Which ones you actually need, we find out before you start.

No. A client opens the link, picks a time, fills in a name and an email address and gets a confirmation. Only the people who offer the appointments, your own colleagues, log in. For the client it is a few clicks, and nobody has to email back to confirm anything.

On your own domain name, for example appointments.yourcompany.nl. We set that up and arrange the secure address. You can put the page as a link in an email or build it into your website. If you ever move to another provider, the address stays yours.

The server is our job: installing, updating, a daily backup with a second copy elsewhere, and monitoring. The content is yours. You and your colleagues decide when you are available and which kinds of appointment exist. Which calendars get linked, we do together at the start.