Hey there! I totally get your struggle with choosing a captcha service. I've been through the same ordeal, and after trying a few, I landed on xCaptcha (https://xcaptcha.com/). It's been a game-changer for me. The implementation is straightforward, and it strikes a good balance between security and user-friendliness. In terms of preventing spam, http://xcaptcha.com/
has been highly effective for me. The customization options allow you to tailor the captcha experience to your specific audience, reducing the likelihood of annoying your users. The real-time analytics feature is a nice touch too – gives you insights into what's happening on your site.

I've found the support from xCaptcha to be top-notch as well. Quick responses and helpful guidance when needed. It's crucial for me as a business owner to have reliable support when dealing with security features.

Give xCaptcha a shot and see if it fits your needs. It's worked wonders for me, and I think you might find it to be a great solution for your captcha needs. Good luck!