Yes, both Google Meet and Calendoo offer a Free Trial.
Google Meet is designed for Large Enterprises, Medium Business and Small Business.
Calendoo is designed for Medium Business and Small Business.
Pricing for Google Meet Starts at $6/User/Month whereas for Calendoo Starts at $8.91/Month when Billed Yearly.
Some top alternatives to Google Meet includes Livestorm, Whereby, Zoom, Cisco Webex Meetings, GotoMeeting, TelebuJoin, Cisco Webex Teams, BlueJeans Virtual Meetings, VideoMeet, WorkHub Connect and Zip Conferencing.
Some top alternatives to Calendoo includes Appointy, Calendly, SimplyBook.me, Cogsworth, Book Like A Boss, Scheduly, checkAppointments, ClickBook, DaySchedule, Appointmind, Web-appointments, CatchApp Bookings and Zoho Booking.