Whoops, just relooked at your title. Epoch and Paycom are the same processor, and most programs are using them as primary, such as platinumbucks, topbucks, sexhit, etc etc. Never heard of Visionbill. Yambo I won't comment on, since I have never used them. CCbill is pretty good too. Your choice (assuming you are in the US) should be between CCbill or Epoch. If you are international, I would suggest
www.acpay.com over
www.glo-bill.com
ZoiNk