The best alternatives to SocialBubble are Unfiltered.news, TheirTube, and LeftRight.news. If these 3 options don't work for you, we've listed a few more alternatives below.
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Postman Recorder by DevTools— Export Postman APIs from browser
TheirTube is a Youtube filter bubble simulator that provides a look into how videos are recommended for other people with different watch history. You can experience 6 perspectives: conspiracist, fruitarian, liberal, conservative, prepper and a climate denier
News Radius is designed to highlight breaking news coverage and how it differs across various outlets. A side-by-side comparison of outlet content illustrates differences in how stories are covered, as well as what issues are covered versus ignored.