Yes, both Appect and InAppStory offer a Free Trial.
Appect is designed for Individuals, Medium Business and Small Business.
InAppStory is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Appect Starts at $12/Month whereas for InAppStory Starts at $399/Month.
Some top alternatives to Appect includes my.new, Native, NinjaSites by 500apps, Qualified, Workvivo, Hyax, InAppStory, Slidepage, SharpDash, Ench, IFTTT and AppConversion.
Some top alternatives to InAppStory includes GA-Insights, Qualified, Workvivo, Offermy, Engage.so, EngageOne Communicate, Pioneer Launcher, Daily Metrics, Icebreaker time!, SharpDash, Spotlight and IFTTT.