While "free" might seem like a good thing, sometimes it really is too good to be true and as many people learn, you get what you pay for. If you're not paying anything, you're probably not getting very much. In fact, some companies lure you in with a "free" service that just can't serve all of your website monitoring needs so you eventually upgrade to the paid plan, and it's not really free after all. In such cases, the rate may have been higher than what it would have been had you gone with a "paid" service to being with.