OpenAI, Mixpanel data breach class action lawsuit overview:
- Who: Plaintiff Jon Woodard filed a class action lawsuit against OpenAI Inc. and Mixpanel Inc.
- Why: Woodard claims OpenAI and Mixpanel failed to prevent a data breach that exposed the personally identifiable information of thousands of users.
- Where: The class action lawsuit was filed in California federal court.
A new class action lawsuit alleges OpenAI Inc. and Mixpanel Inc. failed to prevent a recent data breach that exposed the personally identifiable information (PII) of thousands of users.
Plaintiff Jon Woodard claims OpenAI and Mixpanel confirmed a data breach in November 2025 that exposed the names, email addresses, locations, operating systems and browsers utilized, referring websites, and user IDs of users.
Woodard argues OpenAI and Mixpanel, an analytics platform, failed to safeguard the PII of the affected users, which he claims resulted in the unauthorized disclosure of the information.
“As a result of the Data Breach, which Defendants failed to prevent, the Private Information of Plaintiff and the proposed Class Members was stolen,” the OpenAI data breach class action says.
Woodard wants to represent a nationwide class of individuals whose PII was accessed and/or acquired by an unauthorized party in the OpenAI data breach.
OpenAI data breach caused ‘widespread injury,’ plaintiff claims
Woodard claims OpenAI and Mixpanel’s alleged failure to protect the PII of the affected users has caused them “widespread injury and damages” and left them at risk of identity theft.
“Plaintiff and Class Members now face a lifetime risk of identity theft due to the nature of the information lost, which they cannot change, and which cannot be made private again,” the OpenAI, Mixpanel class action says.
Woodard claims OpenAI and Mixpanel are guilty of negligence, breach of implied contract and unjust enrichment.
The plaintiff demands a jury trial and requests declaratory and injunctive relief and an award of actual, statutory, nominal and consequential damages for himself and all class members.
In other AI news, a New York lawsuit accuses OpenAI and Microsoft of stealing nonfiction authors’ work without permission or compensation, while OpenAI is appealing to a California federal judge to dismiss a class action alleging the company used YouTube videos to train its AI models without the permission of the content creators.
Were you affected by the OpenAI and Mixpanel data breach? Let us know in the comments.
The plaintiff is represented by Daniel Srourian of Srourian Law Firm, P.C.
The OpenAI, Mixpanel data breach class action lawsuit is Woodard, et al. v. OpenAI, Inc., et al., Case No. 3:25-cv-10301, in the U.S. District Court for the Northern District of California.
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