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OpenAI User Drops Privacy Class Action Over Mixpanel Data Breach

News.Bloomberglaw • May 11, 2026

A California resident’s lawsuit against OpenAI Inc. and Mixpanel Inc. alleging the two companies failed to sufficiently protect user data from hackers was voluntarily dismissed from federal court.

Mixpanel, a data analytics provider OpenAI used, suffered a cybersecurity incident, leading Jon Woodard to file a proposed class action in the US District Court for the Northern District of California. The data breach involved analytics data for users of OpenAI’s API product. It also impacted some ChatGPT users who submitted help center tickets or were logged into the API service.

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OpenAI Faces Class Action Over Data Privacy Breach Linked to Mixpanel A California resident filed a class-action lawsuit against OpenAI and Mixpanel, claiming inadequate protection of user data following a data breach at Mixpanel. The breach affected analytics data for users of OpenAI's API, including some ChatGPT users who submitted help center tickets. The lawsuit was voluntarily dismissed on May 11, 2026. In a separate development, another class-action lawsuit was filed against OpenAI on May 14, 2026, alleging that the company integrated Meta's Pixel and Google Analytics into its ChatGPT interface, potentially compromising user privacy by turning sensitive conversations into trackable data for advertisers. This new lawsuit is ongoing, and the implications for user privacy and data protection are significant. 2 sources 49

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OpenAI User Drops Privacy Class Action Over Mixpanel Data Breach

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