Legal Actions & Lawsuits

After Dropbox disclosed the April 2024 Dropbox Sign breach, affected users filed proposed class actions in federal court alleging Dropbox negligently failed to protect their data and did not give prompt, adequate notice; the claims are allegations and the consolidated litigation followed in the Northern District of California.

Following the 2024 Dropbox Sign breach, affected users filed proposed class-action lawsuits accusing Dropbox of failing to secure their data and of notifying victims too slowly. Dropbox has contested the claims, arguing the exposed data poses no identity-theft risk.

When the EU's top court struck down the EU–US Privacy Shield in 2020, Dropbox — which had self-certified under the framework — was among the US cloud services left exposed to European data-protection regulators questioning whether personal data could lawfully be transferred to the United States.

Investors who bought stock tied to Dropbox's March 2018 IPO alleged the registration statement concealed a slowdown in converting free users to paying ones; after an initial dismissal, the case settled for $1.38 million with no admission of wrongdoing.

Four California district attorneys accused Dropbox of violating the state's Automatic Renewal Law for its Dropbox Pro subscriptions; Dropbox settled for $2.15 million and agreed to change its renewal disclosures, without admitting liability.

Synchronoss Technologies accused Dropbox of infringing three data-synchronization patents; Dropbox won summary judgment of non-infringement and invalidity in 2019, and the Federal Circuit affirmed in 2021.

Thru Inc. claimed it had used the term 'Dropbox' since 2004 and threatened the company's trademark; Dropbox sued first for declaratory relief, won summary judgment, and the Ninth Circuit affirmed — with a roughly $2.3 million attorneys'-fee award against Thru.

Security researcher Christopher Soghoian filed a complaint with the U.S. Federal Trade Commission alleging that Dropbox made deceptive claims about its encryption, because Dropbox employees could in fact access users' files.

Security researcher Christopher Soghoian filed an FTC complaint alleging Dropbox had told users their files were inaccessible even to Dropbox employees, while its actual architecture — and a quietly revised Terms of Service — made clear the company could decrypt and hand over files.