How do I prove I wrote my essay if GPTZero flagged it?

Process evidence is the strongest defense: drafts, version history, notes, and a record of the writing session itself. Google Docs version history helps if you wrote there, and GPTZero's own Writing Reports can replay Docs activity. Diglot goes further — it records a signed, append-only event chain while you write and turns it into an Authorship Certificate your instructor can verify through a link.

Are AI detectors biased against non-native English speakers?

The published evidence says the risk is real for detectors as a class: the Stanford study (Liang et al., 2023) found 61% of TOEFL essays by non-native speakers were falsely flagged. Vendors, GPTZero included, say they have worked on reducing this, but no detector removes the uncertainty. If English is your second language, do not rely on a clean scan — keep evidence of your process.

Should I check my paper with GPTZero before submitting it?

You can, but understand what a clean scan buys you: not much. Detector results can change between model versions and often disagree across detectors — your instructor's scan may not match yours. A pre-check tells you how one model reads your text today; it does not bind anyone. Evidence of how you wrote is more durable than a screenshot of a score.

Do universities accept GPTZero scores as proof of cheating?

Policies vary, but most academic-integrity guidance treats detector output as a signal that starts a conversation, not proof that ends one — GPTZero says much the same. In practice, though, a score often shifts the burden onto the student. So the practical question is not whether the score counts as proof, but what you can put on the table next: drafts, history, and process evidence.

Adjacent comparison

Diglot vs GPTZero

A detector scores your finished text. Diglot documents how you wrote it.

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Where GPTZero ends and Diglot begins

GPTZero is probably the detector your work will meet first. Edward Tian built it as a Princeton student in January 2023, and it became the name teachers reach for when a submission feels off. Credit where it is due: GPTZero took the education market seriously, publishes its own accuracy testing, and tells educators not to treat a score as a verdict. As detectors go, it is one of the more responsible vendors. But it is still a detector, and this comparison is honest about what that means. A detector reads your finished text and estimates a probability. It cannot see that you spent four hours on two paragraphs, translated half of them from your first language in your head, and rewrote the opening six times. A Stanford study (Liang et al., published in Patterns, 2023) found AI detectors falsely flagged 61% of TOEFL essays by non-native English speakers. Careful, deliberate second-language writing is exactly the writing detectors struggle with — I write English as a second language myself, and this is a large part of why Diglot exists. So the real question is not "GPTZero or Diglot" — they do different jobs. GPTZero judges output. Diglot documents process: it records how your text was written, as you write it, and issues a signed Authorship Certificate a reviewer can verify independently. If a score has already been used against you, another score will not save you. Evidence of process might.

What GPTZero sells, where Diglot is different

What GPTZero sells

AI-generated text detection with document-level and sentence-level scoring
Plagiarism checking alongside AI detection
Writing Reports — a replay of Google Docs writing activity via its browser extension
LMS integrations and an API for schools and institutions
A free tier for quick, limited scans

Why GPTZero wins

Name recognition: it is the detector teachers actually know, so its scores carry practical weight whether or not they should
First-mover credibility in education — launched January 2023 and built for classrooms from the start
More candid than most vendors about limits: publishes accuracy testing and tells educators a score is a signal, not proof
Sentence-level highlighting shows which passages triggered the model, not just an overall verdict
A usable free tier plus the institutional integrations (LMS, API) that schools deploy at scale

Where Diglot is positioned differently

Diglot does not try to out-detect GPTZero — a better score is not our product. We sit on the other side of the accusation: a bilingual editor for ESL writers that records the writing process as it happens and issues a cryptographically signed Authorship Certificate. When a detector score is used against you, the useful response is not another opinion on your finished text; it is verifiable evidence of how the work was made. That is what we build.

Feature-by-feature comparison

Feature	GPTZero	Diglot
What gets analyzed	The finished text — statistical patterns and classifier signals	The writing process — an event record built while you type
A detector can only see output; process evidence shows how the output came to be.
What you receive	A probability score with sentence-level highlighting	A signed Authorship Certificate with a shareable verification page
False-positive handling	Sentence-level breakdown; publicly advises against punitive use of scores alone	No score exists to dispute — the certificate is evidence, not a judgment
A Stanford study (Liang et al., published in Patterns, 2023) found AI detectors falsely flagged 61% of TOEFL essays by non-native English speakers — a category-wide finding, not a GPTZero-specific figure.
Process evidence	Writing Reports can replay Google Docs activity where its extension is installed	Built into the editor itself: an append-only, ed25519-signed edit-event chain
Both vendors recognize process matters; GPTZero adds it through a browser extension, Diglot records it inside the editor itself.
ESL awareness	General-purpose detection; the company has said it works to reduce ESL bias, but there is no ESL-specific writing support	Built for ESL writers: bilingual editor, translation with a visible trace, grammar help in your second language
Writing assistance	✗	Full editor: translation, grammar, paraphrase, citations, templates
GPTZero is a detection product, not a writing tool — a category difference, not a flaw.
Who it serves first	Educators and institutions screening submissions	The writer producing the work
Price for an individual writer	Free scans with word limits; paid plans for higher volume	Free plan; full Authorship Certificate on Pro at $29/mo

When GPTZero is the right pick, when Diglot is

GPTZero wins when

You are an educator screening a whole class of submissions and need a fast first pass
Your institution already runs GPTZero through its LMS, and using its Writing Reports proactively fits that workflow
You want a quick read on how one model scores a text before submission, understanding that results can change with model updates and differ between detectors
You need AI detection and plagiarism checking together in a grading workflow

Diglot wins when

You write English as a second language and detectors keep reading your careful writing as machine-like
You have already been flagged and need evidence of how you wrote, not another opinion on what you wrote
You want protection that accumulates while you draft, instead of a scan after the fact
You need the writing help itself — translation, grammar, paraphrase, citations — in the same place the evidence is recorded
Your instructor or integrity office is open to reviewing process evidence in an appeal

Pricing

GPTZero

Free scans with monthly word limits; paid individual plans from roughly $10/month; institutional and API licensing for schools

Diglot

Free plan with core tools; Spark $19/mo; Pro $29/mo ($290/yr) includes the full Authorship Certificate

Pricing verified 2026-07-10. Public pricing changes — confirm on each vendor's site before purchase.

Sound like you? Try Diglot free.

If «you write english as a second language and detectors keep reading your careful writing as machine-like» describes your work, the free tier is meaningful for daily writing — no credit card.

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Frequently asked questions

Can GPTZero falsely flag my essay as AI-written?: Yes. Every AI detector produces false positives, and GPTZero itself tells educators not to treat a score as proof on its own. A Stanford study (Liang et al., published in Patterns, 2023) found AI detectors falsely flagged 61% of TOEFL essays by non-native English speakers. If you write English as a second language, your careful, deliberate prose is statistically more likely to be misread.
How do I prove I wrote my essay if GPTZero flagged it?: Process evidence is the strongest defense: drafts, version history, notes, and a record of the writing session itself. Google Docs version history helps if you wrote there, and GPTZero's own Writing Reports can replay Docs activity. Diglot goes further — it records a signed, append-only event chain while you write and turns it into an Authorship Certificate your instructor can verify through a link.
Are AI detectors biased against non-native English speakers?: The published evidence says the risk is real for detectors as a class: the Stanford study (Liang et al., 2023) found 61% of TOEFL essays by non-native speakers were falsely flagged. Vendors, GPTZero included, say they have worked on reducing this, but no detector removes the uncertainty. If English is your second language, do not rely on a clean scan — keep evidence of your process.
Should I check my paper with GPTZero before submitting it?: You can, but understand what a clean scan buys you: not much. Detector results can change between model versions and often disagree across detectors — your instructor's scan may not match yours. A pre-check tells you how one model reads your text today; it does not bind anyone. Evidence of how you wrote is more durable than a screenshot of a score.
Do universities accept GPTZero scores as proof of cheating?: Policies vary, but most academic-integrity guidance treats detector output as a signal that starts a conversation, not proof that ends one — GPTZero says much the same. In practice, though, a score often shifts the burden onto the student. So the practical question is not whether the score counts as proof, but what you can put on the table next: drafts, history, and process evidence.