ThisCaller is described as 'Telemarketers, debt collectors, charities, survey companies and scammers often call without leaving a message or disconnect once you answer. ThisCaller.com helps you to find public caller information by using free reverse phone lookup'. There are four alternatives to ThisCaller, not only websites but also apps for iPhone. The best alternative is Reported Calls, which is free. Other great sites and apps similar to ThisCaller are 800 Notes (Free), USCallers (Free) and Reverse Lookup (Free).