My first impressions without scrolling:
* Calendso has something to do with calendars, based on the name.
* It has a popular paid competitor called Calendly.
* It's open source, and there is a hosted version as well.
I do not yet know what problem it is solving for me or its existing customers.
Scrolling down slightly further, I see the testimonials, and see people find it when looking for a "scheduling & booking platform". I assume that's what it is, but I don't know why I need a "scheduling & booking platform".
When I scroll further or click "Features", I am jumped down the page, and I find out it is easily customizable, and has a bunch of integrations. I don't entirely understand what I can do with it or how I can interact with it as a user.
I have never heard of Calendly, and thus head over to their website. The first thing I see is "Calendly helps you schedule meetings without the back-and-forth emails". Clicking their "Features" link, I find claims they are "The best automated scheduling software" and without scrolling I learn it "automatically check[s] availability and help[s] you connect with your best contacts, prospects and clients".
Based on my glance at Calendly, I'm not a potential customer or user, but I only learned that from your competitor, and I only learned about your competitor from you.