A spreadsheet (Google Sheets, Excel)
The most flexible option, and the easiest to break. You can add any column, it costs nothing, and several people can edit at once.
It fits when one person writes the bookings, there are few rooms, and a clash is cheap to fix.
Skip it when members or customers book for themselves. Edit access lets them break the sheet. View access does not let them book. Nothing stops two names in the same cell.
Rizaburo
A free meeting-room board. People drag onto a horizontal timeline, and they do not need an account. It does not take card payments or sync an external calendar.
It fits when the current Rizaburo board already works, everyone knows the screen, and you want to keep a free public schedule.
Skip it when you need to book from a phone, push holds into Google Calendar or Outlook, or repeat the same weekly slot.
Paid booking software
Products such as STORES Reservation, RESERVA, and freee Reservation. They add a booking site, a customer list, and checkout. Some connect a smart lock for unstaffed spaces. Most charge a monthly fee or a fee when a booking is confirmed.
It fits when guests pay at booking time, you want cancellation fees, you want to stop handing out keys, or you need a visit history.
Skip it for internal rooms, clubrooms, and member slots where money is collected somewhere else. You pay the subscription and still ask guests to create an account.
pencil.in
Only the admin signs in. Everyone else gets a share URL and does not need an account. The database rejects two confirmed bookings for the same room and time. An iCal feed mirrors the board into a normal calendar. Ads are shown.
It fits when several people book from the open slots, you do not want a monthly fee, and payments or a customer database already live somewhere else.
Skip it when you need checkout, a lock, or sales reporting. That is the paid booking software’s job.