SafeAssign vs Turnitin: What Each One Actually Checks

SafeAssign, per Blackboard/Anthology's own documentation, checks submissions against three sources: a Global Reference Database of "over 15 million papers volunteered by students from Blackboard client institutions," each institution's own archive of previously submitted papers, and an internet index built on Blackboard's internal search service, which the documentation says stays "generally current within 1-3 days of a change."

Turnitin's own database page claims a larger web index — 54 billion web pages via its own crawler — plus what it calls "the world's largest index of student papers," and licensed scholarly content from major academic publishers including Elsevier, Springer Nature, Wiley, Taylor & Francis, and IEEE. Turnitin doesn't publish an exact count of total student papers, so "largest" is Turnitin's own characterization, not an independently verified figure.

This is where the two tools split. Turnitin has a dedicated, separately-scored AI writing indicator alongside its similarity report — a percentage estimate of how much of a document shows patterns consistent with AI-generated text, distinct from the plagiarism/similarity match score.

SafeAssign's own documentation doesn't describe an equivalent feature. Its originality report is built entirely around text-matching against the three source types above. A Blackboard whitepaper on academic integrity explicitly frames 'anti-plagiarism tools such as SafeAssign' as a separate category from 'AI detectors' — language that treats the two as different things, not SafeAssign as a superset that also does AI detection. If your school uses SafeAssign specifically (rather than SafeAssign alongside a separate AI-detection tool), it isn't clear from Blackboard's own materials that AI-generated text is being flagged at all.

Which tool your school uses isn't something you choose — it's set at the institution level, and some schools run both. But knowing the difference matters: a clean SafeAssign originality score tells you about text-matching only, not whether AI-generated content would be flagged, since SafeAssign's own documentation doesn't claim that capability. A Turnitin report, by contrast, gives you two separate numbers to think about.

If you don't know which tool your course uses, check your assignment submission page or ask your instructor — the two tools produce genuinely different kinds of reports, not just different-looking versions of the same one.