Grammarly AI Expert Review allegedly used author identities without consent
Grammarly faced a class action lawsuit led by journalist Julia Angwin. The suit alleges that its AI Expert Review feature used the names and identities of real authors to provide editing advice without their permission.
Grammarly's 'expert review' AI feature used real writers' names and information to give AI-generated editing advice.
Key facts
- What
- Grammarly faced a class action lawsuit led by journalist Julia Angwin.
- Incident date
- Mar 11, 2026
- Who
- Grammarly
- Failure mode
- Policy Violation
- AI surface
- Copilot
- Severity
- Medium
What happened
Grammarly's AI Expert Review tool allegedly used the names and professional identities of journalists and authors to lend authority to AI-generated editing advice. Journalist Julia Angwin filed a class action lawsuit against the company for violating privacy and publicity rights. In response to the controversy, platforms like Superhuman disabled the feature.
What broke inside the model
- 01 · TriggerA prompt pushes against a deployment boundary.
- 02 · Model stepThe model produces the disallowed output.
- 03 · Control gapNo enforcement blocks it at generation time.
- 04 · FailureThe output crosses the policy line.
- 05 · ConsequenceA limit the business set is breached in public.
The output crosses a policy boundary the deployment had defined.
The system implemented expert personas by utilizing real-world professional identities without legal authorization or consent. This failed to adhere to data privacy standards and the legal requirements for publicity rights.
What it cost
Sources
- PressSuperhuman is disabling Grammarly's "expert review" AI featuretheverge.com
- PressA writer is suing Grammarly for turning her and other authors into AI editors without consenttechcrunch.com
- PressGrammarly is facing a class action lawsuit alleging its AI-powered Expert Review tool used real authors' identities without consentmashable.com
Cite this entry
https://failureindex.ai/failures/grammarly-expert-review-allegedly-used-authorAI Failure Index. "Grammarly AI Expert Review allegedly used author identities without consent" (FI-0550). Realm Labs. https://failureindex.ai/failures/grammarly-expert-review-allegedly-used-author (indexed Jun 16, 2026).Data fields CC-BY 4.0, prose citation permitted. Incident ID FI-0550. Full dataset at /data.
Note from Realm Labs, the Index steward
How Realm would have caught this
- Prism
- OmniGuard
Realm compares what the model is about to output or do against the policy that governs the deployment, in real time, and can deny or redact the action before it takes effect, which is the gap an after-the-fact review never closes in time.