Yes, both Zoai and SlickPOS offer a Free Trial.
Zoai is designed for Medium Business and Small Business.
SlickPOS is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Zoai Starts at $7.16/Month whereas for SlickPOS Starts at $19/Month.
Some top alternatives to Zoai includes SlickPOS, POSist, POS Online, Restora POS, SALT POS, PosEase, Qualified, Lunchbox, Workvivo and IFTTT.
Some top alternatives to SlickPOS includes TouchBistro, POSist, Paytouch, POS Online, posIPOS, Abacus POS, Petpooja, Billberry POS, PosEase and RoyalPOS.