ClickTale records a browser session and allows you to replay it like you're watching the user over their shoulders and there is a bit of lag between when a user visits and when the video is available to watch. Chartbeat, on the other hand, gives you just the stats in absolute real-time. So, they actually do different things. If you want to know what people are doing on your site right now, then you'll want real-time analytics like Charbeat. If you want to know how users interact with your application, then you'll want ClickTale.