If you're searching for Unicheck, the short answer is that it isn't a separate standalone product anymore — Turnitin acquired it, and Unicheck customers have been moved over to Turnitin's own tools.
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Turnitin's own product page confirms Unicheck and Turnitin "joined forces," with Unicheck's institutional customers migrated to Turnitin Similarity, which Turnitin describes as offering a comparable experience — familiar color-coded similarity reports, source filters, and comparison tools, just under the Turnitin name.
There's no mention of a free standalone Unicheck tier in Turnitin's own migration materials — the transition is aimed at institutions moving their existing paid accounts over, not individual students signing up fresh.
If your school previously used Unicheck, check whether they've already switched your course over to Turnitin Similarity — the underlying report format is designed to be familiar if you've used Unicheck before.
If you don't have institutional access to either tool and just want to check your own draft before submitting, a separate student-facing plagiarism checker is the more realistic option, since neither Unicheck nor Turnitin sell direct-to-student individual accounts.
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