It is great to see an alternative to Google's reCaptcha. 

One quick observation is that it is much more complex than reCaptcha. You need good eyesight and a good display system. Else you are not going to solve them. That means the bots cannot solve them, not only humans.

Other than me anyone has a problem when they call you not a human? hCaptcha calls me at least 10times a day, not a human, which is not nice. 

Another issue is I am getting this error very frequently. "Rate limited or network error. Please retry."

I have reported the error to hCaptcha and talking with them for the past 10 days or so. As far as they care I am the only one having this issue sadly and not prioritized to fix the issue. The solution given to me is :

• clear the cache
• change the IP
• change the browser
   

I think those solutions are not feasible for me on a regular basis to be a human. :)

Let's see where it goes.