Open
Core is public. Host it yourself or let us run it.
Company
Cal is calendar-software-first: white canvas, black buttons, product UI in the cards.
Open-source booking that teams can host or run as Cal Cloud. The marketing surface shows the real widget — calendar grid, time slots, Confirm — instead of painted illustrations.
Core is public. Host it yourself or let us run it.
Show the calendar, don’t illustrate a calendar.
Cal Sans for headlines, Inter for everything else.
Primary stays #111. Blue is a rare accent, never a CTA.