Hi Vengat!
Yes online scheduling is full of great tools, including Calendly, but there are many others - some who serve a particular type of scheduling and so are in a specialist category. At YCBM we have a great offer for companies who need to use multiple calendars for their teams - we have positioned quite a bit of our marketing and content to focus on that (see here for an example)
The second part of your question is actually related - because we’ve been around a long time we actually have historically many thousands of active users and customers, who keep using us for their bookings- which helps push the natural viral growth loop we can rely on over and above tradition content marketing. We also have many schools and universities in America who use us which allows us to grow naturally through word of mouth.