Can You Use Grammarly for College Essays? (2026)

Can You Use Grammarly for College Essays? (2026)

Yes, for spelling and grammar. Caltech's Fall 2027 guidelines list "Using AI tools, like Grammarly or Microsoft Editor, to review grammar and spelling of your completed essays" as ethical. Brown, which bars AI use with application content, says an applicant "may use artificial intelligence to assist with spelling and grammar review." Full-sentence rewrites and generated text are a different question.

Grammarly says it is trusted by "over 40 million people." Few admissions offices name it. When we first published this page in May 2026, our AI policies dataset turned up one university whose admissions policy text named Grammarly: the University of Michigan. That is out of date. Reading the official pages again on October 30, 2026, we found Grammarly named by at least three: Caltech, Michigan's Rackham Graduate School, and Duke's Fuqua School of Business. None of them allows Grammarly to write the essay for you.

Applying to a master's or PhD? Graduate rules differ, and some ask for disclosure rather than giving a yes or no. The University of Hong Kong's research postgraduate supporting-documents page (item (d), checked October 31, 2026) says "use of AI for all purposes should be disclosed, including but not limited to generating research ideas and refining research questions; literature review and information retrieval; language editing assistance; citation management; and data analysis." Paragraph (s) of the Hong Kong PhD Fellowship Scheme 2027/28 Guidance Note uses the same list, "language editing assistance" included. For graduate rules school by school, see Grammarly on your SOP: allowed or counted as AI?

This piece answers four questions students ask and rarely get answered by admissions offices:

• Is Grammarly allowed in college essays?
• Does Grammarly count as AI?
• Can I use Grammarly on my personal statement?
• What if my college doesn't say anything about it?

We'll walk through which schools name Grammarly, which Grammarly features count as AI under their rules, and how to map the five permission levels (L0–L4) we use in our policy methodology onto an actual Grammarly workflow.

Which colleges name Grammarly

Checked on each school's own page on October 30, 2026:

For first-year college applicants, Caltech is the one school in that table that names the brand. Brown and Michigan's undergraduate page name the use (spelling and grammar, proofreading) without naming the product. Caltech also warns that "Failure to comply with the Ethical Use of AI guidelines may result in the rescission of your admission to Caltech."

Which Grammarly features count as AI

"Grammarly" is no longer one product. Grammarly's own plans page (checked October 30, 2026) splits it into features that sit on different sides of the school rules above:

Grammarly itself describes its product as AI, on a page titled "AI at Grammarly" with the line "AI that transforms how people communicate." The product has moved from spellcheck into generative AI. The brand didn't move with it. To a student, "I used Grammarly" still sounds like "I ran spellcheck." To an admissions reader, it could mean any row of the table above, including the one that drafts paragraphs.

If you also use a paraphraser, the same line applies; our page on QuillBot's paraphraser and grammar checker on college essays runs the same feature-by-feature test.

The University of Michigan: one quote, three different rules

Michigan was the first school we found that names Grammarly, and it shows how one university can have several rules.

Michigan is interesting because the undergraduate policy doesn't name Grammarly, but it does name the use cases. Read on September 1, 2026:

"AI tools can be helpful when used thoughtfully, such as for brainstorming, outlining, proofreading, or organizing information."

"your application should reflect your own ideas, experiences, and authentic voice. Do not copy and paste AI-generated text or submit work that does not represent you."

— admissions.umich.edu/apply/first-year-applicants/essay-questions

Proofreading is named as acceptable, which puts Grammarly's spellcheck use case inside the line even though the brand is never mentioned. What is out is pasted AI-generated text. (An earlier version of this section quoted Michigan's Common App fraud reference as the undergraduate policy; the page now publishes its own guidance, and we corrected this on September 1, 2026.)

The Grammarly mention lives one level deeper, in Michigan's Rackham Graduate School policy for grad applicants:

"GenAI tools, like Grammarly, may be used to review grammar and spelling of your application essays."

But the same Rackham page immediately adds:

"Your application essays should reflect your unique academic, research, and life experiences, and you should be the sole author of all written passages in your essays."

And then it requires every applicant to attest to sole authorship, with revocation consequences if the attestation turns out to be false.

In our rubric, Rackham's posture comes out as L3/D3/E0 — brainstorming and mechanics are fine, but no AI rewriting, AI-specific attestation required, and no published detection step. Michigan's undergraduate posture comes out as L3/D0/E0 as well — assistance named and permitted, authorship reserved, no AI-specific disclosure form, no stated enforcement step. The difference is the attestation, not the permission.

So Michigan doesn't have a single Grammarly answer. It has three: Rackham permits the spellcheck use case with strings attached, the Law School separately tells applicants they "ought not use generative artificial intelligence tools as part of their drafting process" (2026-27 wording, checked September 1, 2026) while requiring generative AI for one optional essay, and the Ross School of Business goes the other direction entirely, allowing AI essay assistance with mandatory APA citation. That's four different policies under one university brand. (We wrote about exactly this kind of intra-university split in Same School, Different AI Rules.)

Michigan is no longer the only university that names Grammarly (see the table above), but it is still the clearest example of one brand name meeting several rules.

The L0–L4 framework, applied to Grammarly

GradPilot classifies every school on a five-level permission scale (L0 to L4) plus disclosure (D0–D3) and enforcement (E0–E3). You can read the full definitions on the methodology page. For Grammarly specifically, here's how each level translates into practice:

Counts below are from the 180 schools in our dataset as of October 30, 2026.

L0 (Silent — 127 schools, 71% of the dataset)

The school has no admissions-specific AI policy. Stanford, MIT, Penn, Princeton, Notre Dame, Rice, NYU, and about 120 other institutions all live here.

What it means for Grammarly: Implicitly fine. The default backstop is the Common App fraud certification, which prohibits generated content but says nothing about spellcheck or grammar review. If you ran free-tier Grammarly across your essay, no one at an L0 school will plausibly call that a violation. Pro-tier sentence rewrites are a grayer zone — defensible, but if you got asked, you'd want to be honest about it. The generative AI / drafting features are over the line by the fraud-certification standard regardless of school silence.

L1 (Permissive — 2 schools)

Generative AI text may be included, subject to fraud and disclosure rules. This is a vanishing tier — only Wisconsin-Madison and Duke currently sit here in our dataset.

What it means for Grammarly: Use whatever tier you want, just don't fabricate experiences. Even AI drafts are tolerated at this permission level, provided the content is true and you take responsibility for it.

L2 (Substantive assistance — 28 schools)

AI may paraphrase, suggest line edits, rephrase sentences, translate the applicant's own words, and provide style/clarity suggestions. The final wording must be the applicant's. Schools like UCLA, UC Berkeley, Caltech, Carnegie Mellon, and Georgia Tech sit here.

What it means for Grammarly: This is exactly Grammarly Pro's job description. "Line edits and clarity suggestions" is what Grammarly Premium does. By the rubric, L2 schools should permit Grammarly Pro use. Note that 6 of these 28 schools (Caltech, UC Berkeley, UCLA, UC Santa Cruz, UC Santa Barbara, UVA) require an AI-specific attestation on top — D3 — so even where the use is permitted, the school may make you affirm it. The generative drafting features ("write a paragraph about why I want to study CS") still fall outside this permission.

L3 (Brainstorm and mechanics only — 16 schools)

AI is allowed for brainstorming, outlining, topic discovery, and basic mechanics (spelling/grammar). No AI rewriting of sentences. No generated phrases or passages in the submission. Cornell, Johns Hopkins, Dartmouth, Northwestern, Tufts, Michigan undergraduate admissions and Rackham (Michigan grad) live here.

What it means for Grammarly: Free-tier spellcheck and grammar review are fine. Pro-tier sentence rewrites are explicitly out — that's exactly what L3 disallows. Generative features are also out. If you're at an L3 school and you accept a Grammarly Pro suggestion that rewrites your sentence, you're outside the line the school drew, even if Grammarly's brand makes the action feel innocuous.

L4 (Prohibited — 7 schools)

No AI use for any part of admissions writing. Brown, BYU, Georgetown, Harvard College, SMU, Villanova and Wesleyan live here. Michigan's undergraduate admissions used to be counted in this cell; its published page permits proofreading, so it moved to L3 on September 1, 2026. Harvard's code is for Harvard College and does not govern Harvard's graduate and professional schools.

What it means for Grammarly: None of the L4 schools names Grammarly. Brown, though, writes the exception into its rule: an applicant "may use artificial intelligence to assist with spelling and grammar review, in the same way as any other platform that supports basic proofreading." At Brown, free-tier spelling and grammar review is inside the line and every other Grammarly feature is out. For L4 schools that publish no such exception, a defensible read is that spellcheck, which doesn't generate content, survives a prohibition aimed at generating content. A more conservative read is that "no AI use in any form" means no Grammarly at any tier. We'd default to the conservative read at those schools.

"Tools like Grammarly are fine": the sentence few schools write

Here is the strange part. In our rubric, the example phrase for an L2 classification is "Tools like Grammarly are fine; don't let AI write it for you." That sentence is the textbook L2 statement. Of the pages we checked, Caltech's guidelines and Duke Fuqua's MBA instructions come closest; most admissions pages never name the brand.

The reason matters. Universities know what Grammarly is. They know students use it. They could clear up much of the confusion by adding one sentence to their admissions page: Free-tier grammar and spellcheck tools, including Grammarly, are permitted. Generative features that draft sentences or paragraphs are not.

Almost no one has. Instead, the policy literature has converged on a single proxy term — "generative AI" — that has to do simultaneous duty for:

• ChatGPT, Claude, and Gemini (named or unnamed)
• Grammarly's draft generation features (almost never named)
• Grammarly's sentence rewrites (Pro tier; ambiguous)
• Grammarly's spellcheck (free tier; clearly permitted)
• Microsoft Editor, Apple's built-in writing tools, and every other ambient writing assistant

"Generative AI" is a category that no longer maps cleanly to a product. Students can't act on it without making a brand-tier judgment call the school refuses to make on their behalf.

So, can you use Grammarly on your college application?

Here is the closest thing to a clean answer we can give based on the actual policy landscape:

Free-tier spellcheck and grammar review. Use it. Caltech names it as ethical and Brown, an L4 school, allows it. At L0 silent schools, it's covered by the Common App fraud floor (which targets generation, not correction). At L1, L2, and L3 schools, it's explicitly within the permitted zone. At L4 schools other than Brown, it's a defensible gray area, and you can choose your risk tolerance. There is essentially no realistic scenario where a college rescinds an offer because you ran spellcheck.

Premium / Pro features that rewrite sentences. Defensible at L0, L1, and L2 schools. Outside the line at L3 schools (which explicitly prohibit AI rewriting). Off the table at L4 schools. Worth knowing: 6 of the L2 schools require an AI-specific attestation, so even where the use is permitted, you may be asked to affirm it on the application.

Generative / draft-paragraph features. Avoid for any application essay, at any school. This is the use that the Common App fraud policy targets directly. The same Grammarly button that drafts a marketing email for you is the button that crosses the line on a personal statement. Brand familiarity with Grammarly does not change what the underlying action is.

The deeper recommendation: know which tier of Grammarly you actually have running. If you're not sure whether you accepted a free-tier punctuation fix or a Pro-tier sentence rewrite, you're not sure what the school would think you did. Grammarly itself has made that distinction blurry in 2026 — every suggestion shows up in the same purple bar — and the only way to stay on the right side of any school's policy is to know what your own software just did.

What this means for the rest of admissions

The Grammarly gap is the most visible example of a bigger pattern. Related reading:

• The Common App AI policy paradox — the certification 18% of schools defer to is stricter than most students realize.
• Do colleges actually use AI detectors? — what schools check for vs. what they tell you they check for.
• Can you use ChatGPT on a medical school application? — the same question under a stricter policy regime.

You can also browse the full AI policies directory school by school, and the methodology page breaks down how each L/D/E classification is decided.

The honest summary: Grammarly counts over 40 million users, and only a handful of admissions pages name it. Until higher education catches up to its own student body, you'll have to make the call yourself — and the best version of that call is one where you know which feature of Grammarly you used, on which school's essay, under which level of permission. That's the asymmetry. Now you have a map.