Findings from Incogni study reveal that some of the most popular, from companies like Meta, Google, and Microsoft, are collecting sensitive data and sharing it with unknown third parties, leaving users with limited transparency and virtually no control over how their information is stored, used, and shared. Key findings: Meta.ai and Gemini collect precise location data and physical addresses of their users; Claude shares email addresses, phone numbers, and app interaction data with third parties, according to its Google Play Store listing; Grok (xAI) may share photos provided by users and app interactions with third parties; Meta.ai shares names, email addresses, and phone numbers with external entities, including research partners and corporate group members; Microsoft’s privacy policy implies that user prompts may be shared with third parties involved in online advertising or using Microsoft’s ad tech; Gemini, DeepSeek, Pi.ai and Meta.ai, most likely are not giving users the ability to opt out of training the models with their prompts; ChatGPT turned out to be the most transparent when it comes to the information on what prompts will be used for model training, and a clear privacy policy.