Sure alternatives

Callblock is the first app that lets you stop telemarketing phone calls in iOS (https://techcrunch.com/2016/09/07/callblocks-new-ios-app-will-block-calls-from-over-2-million-telemarketers/), with the world’s biggest directory of telemarketers – now over 3,000,000 classified entries from over 100 countries!

Credo360 is an open reputation system, where your score is based on ratings and reviews you get from people you deal with. It works like reputation systems on eBay or Airbnb - but Credo reputation belongs to you as a person. Use Credo when you need to deal with someone you don’t know. This will help you keep your privacy and avoid scams.

Hiya is a Seattle-based company that sells caller profile information to identify incoming calls and block suggested unwanted ones.