Anonymity by Design
Glassdoor is built around anonymous employee and former-employee reviews, which is central to its value proposition and makes identifying a reviewer considerably harder than on platforms tied to real identities. That doesn't make a false Glassdoor review unaddressable in litigation, but it does mean the investigation typically focuses more on the content itself — whether specific factual claims are verifiably false, as opposed to protected opinion about workplace culture or management style — than on identifying the author, at least in the early stages of a matter.
Glassdoor-Specific Analysis
That includes documenting specific factual claims within a review (as opposed to opinion-based statements, which are typically protected and rarely support a viable claim), cross-referencing claims against employment and HR records where available to counsel, and preparing a flagging submission under Glassdoor's community guidelines where appropriate as a parallel track to any litigation.