We use Century Business Solutions. They integrate with Sage 100 and I was able to negotiate great rates as compared to Paya. It was several years back, but I really had a hard time getting ahold of Paya and when I did, they seemed uninterested in offering competitive rates.

We use Century Business Solutions. They integrate with Sage 100 and I was able to negotiate great rates as compared to Paya. It was several years back, but I really had a hard time getting ahold of Paya and when I did, they seemed uninterested in offering competitive rates.

We also use Century Business Solutions (CBS) and find them to be very competitive with rates and their customer service is top notch.  Normally I can get someone right off the bat.  We original had Paya but moved to CBS and have not looked back.

Does using Century Business Solutions require a Master Developer add-on to our Sage 100 system? We're trying to avoid that if possible. 

Everything that integrates and replaces Paya functionality requires an installed enhancement to Sage 100.  (And once you convert your Paya data to the new 3rd party processor, there is no easy way to undo that data copy... 3rd party processors don't allow others to access their vault... so choose wisely).