Yes, both FindmeIP and Observa offer a Free Trial.
FindmeIP is designed for Large Enterprises, Medium Business and Small Business.
Observa is designed for Individuals and Small Business.
Pricing for FindmeIP Starts at $3.99/month whereas for Observa Starts at $15/Month.
Some top alternatives to FindmeIP includes Whoisvisiting, ipgeolocation, ipstack, Snitcher, IP2Location.io, Qualified, Workvivo, VisitorAPI, IPinfo.io, IFTTT and SmartIP.
Some top alternatives to Observa includes iCompaas, Cloudzatic, DisruptOps, Qualified, Workvivo, Crowd Sentry, ARGOS Cloud Security, AWS CloudFormation, Expose, Telescope, AWS Systems Manager and Qualys Cloud Platform.