Yes, both iSeller and Lightspeed eCom offer a Free Trial.
iSeller is designed for Medium Business and Small Business.
Lightspeed eCom is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Lightspeed eCom begins at $69/Month when Billed Yearly, while pricing details for iSeller are unavailable.
Some top alternatives to iSeller includes WooCommerce, Shopify Plus, BigCommerce, Shopify, AmeriCommerce, 1ShoppingCart, Elliot, Oneshop, Ecwid and ICRM Software.
Some top alternatives to Lightspeed eCom includes WooCommerce, Shopify Plus, BigCommerce, Shopify, Shopnix and Shift4Shop.