What AI detector do colleges use? Canvas, Blackboard, Brightspace, Moodle and more, checked

If you study at a college that uses Canvas, Blackboard, Brightspace, Moodle, Google Classroom or Gradescope, you have probably wondered whether the platform itself is scanning your essays for AI. It isn't. None of these learning management systems (LMS) has an AI detector of its own. An AI score appears only when your school has paid for a separate detector — most often Turnitin — and connected it to the platform. This guide shows what each platform does and doesn't check, which detectors sit behind the scores, and what that means if you write in English as a second language.

The short answer, platform by platform

Copyleaks, one of the two detectors most often connected, lists its AI detector as available in Canvas, D2L Brightspace, Moodle, Blackboard, Schoology, Edsby and Sakai (Copyleaks, 2025). Whether it is switched on for your course is a decision your institution makes — and sometimes your individual instructor.

Does Canvas detect AI?

Not by itself. Canvas is the platform where you submit work; it does not analyse your writing for AI. When a similarity or AI score appears next to a Canvas assignment, it comes from a tool your school connected — usually Turnitin, sometimes Copyleaks. If your assignment page mentions Turnitin, or you receive a Turnitin receipt, your submission is being checked by Turnitin, and your instructor may see its AI writing indicator if the school licenses it.

Does Blackboard detect AI? What about SafeAssign?

Blackboard Learn has no AI detector of its own. Its built-in tool, SafeAssign, compares your text against web pages, published sources and earlier submissions and reports how much matches — a similarity check. AI-generated text is usually new text, so a similarity checker is not designed to flag it. Schools that want AI detection in Blackboard connect Turnitin or Copyleaks. A high SafeAssign percentage means matching text (often properly quoted sources or common phrases), not suspected AI.

Does D2L Brightspace detect AI?

No. Brightspace routes submissions to whatever tools the institution has connected, most commonly Turnitin. It is also where one of the best-known decisions against AI detection was made: Vanderbilt University turned off Turnitin's AI detector in its Brightspace courses, noting that even a 1% false positive rate could mean around 750 of the 75,000 papers it submitted in a year being wrongly flagged (Vanderbilt University, 2023).

Does Moodle detect AI?

Moodle is open-source and has no AI detector in its core. Schools add checking through plugins — Turnitin's plugin brings its reports into Moodle assignments, forums, quizzes and workshops (Moodle Plugins directory), and Copyleaks and other vendors offer their own. Because every Moodle site is configured differently, the only reliable answer comes from your course page or your instructor.

Does Google Classroom detect AI?

No. Google Classroom's originality reports compare your Google Docs, Slides or Word files against web pages and books, and against earlier submissions from your school if an administrator enables it (Google Classroom Help). They report matching passages; they do not estimate whether text was written by AI. Teachers who want an AI score in Classroom install a third-party add-on or paste text into a separate detector.

Does Gradescope detect AI?

Gradescope has no AI writing detector. It is owned by Turnitin, but it is built for grading handwritten, typed and programming work, and its similarity feature is for code. If a course checks written work for AI, that normally happens in Turnitin or the main LMS before or alongside Gradescope grading.

The detectors behind the scores

• Turnitin. The most common. Its AI writing indicator estimates what share of a document looks AI-generated. Turnitin reports a false positive rate of about 1% at the document level for documents scored above 20% AI, and about 4% at the sentence level; scores below 20% are shown with an asterisk because they are less reliable (Turnitin, 2023). Access depends on your school's licence. More in is Turnitin's AI detector accurate?
• Copyleaks. Connects to most major LMSs and highlights the phrases it considers typical of AI.
• GPTZero. Mostly used by individual instructors who paste text in or use its browser tools. See is GPTZero accurate?
• Originality.ai and others. Available as plugins or browser extensions, typically chosen by individual teachers rather than whole universities.

Do professors check for AI?

Some do, many don't, and policies differ between courses at the same university. Where AI checking happens, it usually looks like one of these:

• An AI score that appears automatically because the course uses Turnitin or Copyleaks.
• An instructor pasting a suspicious passage into a free detector.
• Non-detector checks: asking to see your document's version history, comparing the work with your in-class writing, or asking you to explain your argument in person.

The last group matters most for honest writers, because it is evidence you control. It is also where non-native writers can be treated unfairly: in a Stanford study, seven detectors labelled 61.22% of human-written TOEFL essays as AI on average (Liang et al., 2023). If that happens to you, follow our step-by-step guide to defending yourself.

What is the best AI checker for teachers?

Honestly: none has been shown to be accurate enough to decide a case on its own — OpenAI even withdrew its own classifier for low accuracy (OpenAI, 2023). If you teach and use one, these habits keep it fair:

1. Treat a score as a reason to talk, not a verdict. Ask the student about their process before drawing conclusions.
2. Be most careful with short texts and second-language writers. Both produce the predictable patterns detectors associate with AI.
3. Don't compare tools to find a “yes”. Running a text through several detectors until one flags it multiplies false positives.
4. Prefer process evidence. Version history, drafts, notes and short conversations about the work test authorship directly.

Students often ask the same question about QuillBot's AI detector. We know of no peer-reviewed, independent evaluation of it; published tests are run by vendors or bloggers and vary widely with the texts they choose. Assume it shares the limits of the tools that have been tested independently — and see every sourced number in our AI detector accuracy statistics.

How to protect your own writing

You can't control which detector your college uses, but you can make any false flag easy to disprove:

• Write in Google Docs or Word with version history on, and keep outlines and notes.
• If your course allows it, use a writing-process tool. Grammarly Authorship, for example, labels which parts of a document were typed, pasted, AI-generated or edited (Grammarly, 2024).
• Fix the phrasing that sounds translated — natural English is less “predictable” to a detector and simply better writing.

Our seven habits that prevent false flags go into more detail.