Yes, both Crisp and Zendesk Chat offer a Free Trial.
Crisp is designed for Individuals, Freelancers, Medium Business and Small Business.
Zendesk Chat is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Crisp Starts at $25/User/Month whereas for Zendesk Chat Starts at $19/User/Month when Billed Yearly.
Some top alternatives to Crisp includes ZoomInfo Chat, LiveChat, LiveEngage, Pure Chat, DeskMoz, MyLiveChat, Intercom, Smartchat, ChatFlow247, Freshchat and Let's Connect.
Some top alternatives to Zendesk Chat includes ZoomInfo Chat, LiveAgent, LiveChat, LiveEngage, Intercom, Comm100 Live Chat, Smartchat, raychat, Freshchat, RingCentral Engage Digital and Let's Connect.