Is there an alternative to Recaptcha?

About a year ago I implemented Recaptcha on our site to protect a few bits that were being attacked by bots. It worked just fine, with just the checkbox. Today I was doing some testing and noticed that it started asking me to identify crosswalks and so on. I do not want that. It will cost me customers. So I tried to go to the admin console to reconfigure the captcha, and the admin console has never heard of me. So although my keys seem to be working just fine, I can no longer locate them on the server.

So of course I *could* try to report this to Google. But I have never had a satisfactory response from Google support before, and I don't trust them to fix the problem anyway. Basically I've had enough of their bullshit.

Is there an alternative to Recaptcha that I can use instead, that is going to continue to work and not give me grief every time the wind changes?