Yes, both Contact At Once and Freshdesk Messaging (Formerly Freshchat) offer a Free Trial.
Contact At Once is designed for Medium Business and Small Business.
Freshdesk Messaging (Formerly Freshchat) is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Contact At Once Starts at $1,100/Month whereas for Freshdesk Messaging (Formerly Freshchat) Starts at $19/agent/month when yearly.
Some top alternatives to Contact At Once includes ZoomInfo Chat, LiveAgent, LiveChat, Crisp, LiveEngage, MyLiveChat, Smartchat, raychat, LinkedChat, ChatFlow247 and Let's Connect.
Some top alternatives to Freshdesk Messaging (Formerly Freshchat) includes ZoomInfo Chat, ClickDesk, LiveAgent, LiveChat, Tidio Chat, DeskMoz, Zendesk Chat, Intercom, Comm100 Live Chat, Smartchat and Tiledesk.