Does Turnitin Detect Grammarly?

Grammarly itself isn't what Turnitin looks for — there's no 'Grammarly detector.' But how you use Grammarly can change your AI score. Accepting basic grammar and spelling corrections on your own writing is generally low-risk. The problem starts with heavy use of Grammarly's rewrite suggestions, tone adjustments and especially its generative AI features, which can smooth your prose into the uniform, predictable register Turnitin's indicator associates with machine writing.

There are documented cases of students flagged after editing fully human essays with Grammarly. The mechanism is subtle: each accepted rewrite nudges sentences toward an even length and a more 'optimal' word choice, gradually stripping the natural unevenness — burstiness — that signals a human author. Polish too hard and your honest essay can read more AI than a rougher draft would.

So the practical question isn't 'does Turnitin detect Grammarly' but 'did Grammarly push my draft into the flag zone?' Find out before you submit: paste your edited essay into the free detector below to read Turnitin, GPTZero and Originality, with the over-polished sentences highlighted. Results vary, so use it as your guide rather than the official result. Where it reads high, the Powerful Model restores a human cadence and makes it pass without changing your meaning or citations, under the Green-Or-Free guarantee.