Grammarly (Pro) review 2027

What problem does Grammarly solve, and who does it help?

Grammarly is a writing checker, and that is the whole of its job. In our test it was the only tool besides a tutor that improved the writing rather than replacing it: it caught grammar, clarity and tone issues in our essay answers that teachers also flagged. That is the benefit — the essay you hand in reads the way you meant it to, and the corrections are ones a teacher would recognise.

The limits are just as clear. It does nothing for math or science, which is why it ranks where it does in a category of eight tools. If your homework is an essay, a lab report write-up or a history answer, it is aimed at you. If it is a problem set, it is not.

Pro adds a citation generator and a plagiarism check, and the tool works inside Google Docs, Word and the browser, so it sits where the writing already happens rather than in a separate tab. The free tier is genuinely useful on its own.

How did Grammarly score in our test?

We scored every tool across five criteria, and Grammarly finished on 7.1 overall.

• Answer quality — 20 out of 30. Correctness and explanation of our 30 test questions, graded blind by two teachers. The teachers gave Grammarly a grade of 74/100.
• Coverage — 12 out of 20. Subjects, textbook editions, grade levels and how often our questions already had an answer. This is where it lost: writing only.
• Study tools — 16 out of 20. Flashcards, practice tests, step-by-step solvers, writing feedback, tutoring access.
• Learning & integrity — 9 out of 10. Whether the tool teaches the method rather than hands over the answer, and its honour-code policies.
• Value — 14 out of 20. Monthly price and what the free tier gives.

The pattern is a tool that does one thing well and is honest about the rest. It scored strongly on learning and integrity and on study tools, and it gave up points on coverage because it has no math or science content at all.

What does Grammarly do well?

The strengths are the ones a writing tool should have. It caught grammar, clarity and tone issues in our essay answers that teachers also flagged — the same problems a marker would circle, found before submission. Pro includes a citation generator and a plagiarism check. It works inside Google Docs, Word and the browser, so there is no new place to write. And the free tier is genuinely useful, which matters when the paid tier is the one with the citation tools.

The measured teacher grade of 74/100 backs that up: on the questions it could actually address, it performed at a level two blind graders recognised.

What are the parts and specs?

Grammarly is software, so the "parts" are the surfaces it runs on and the features behind them.

• Price: Free; Pro from $12/mo billed yearly.
• Free tier: Yes.
• Levels: High school to professional.
• Subjects: Writing.
• Live tutors: No.
• Textbook solutions: No.
• AI assistant: Yes (rewrite, generate — use with care).
• Apps: Browser, desktop, mobile keyboard.

That last row is the practical one. The mobile keyboard means it follows you into apps that have no Grammarly integration, and the browser and desktop apps cover the two places most essays are actually typed.

How does it compare with other homework tools?

Against Khan Academy (8.8, free, with Khanmigo at $4/mo), Grammarly is ahead on writing feedback and behind on everything else: Khan Academy covers math, science, economics, humanities and computing across K–12, early college and SAT/MCAT/LSAT, with an AI tutor that guides rather than answers. Grammarly has no live tutors and no textbook solutions; Khan Academy has no live tutors either but does have the Socratic Khanmigo.

Against Quizlet (8.2, free with ads or Plus at $7.99/mo or $35.99/yr), Grammarly is the writing specialist and Quizlet is the study-set generalist: all levels, all subjects via user-made sets, textbook solutions on Plus, and AI through Magic Notes and Q-Chat. Neither offers live tutors.

Against Wyzant (8.0, from about $35/hr), the comparison is the interesting one. Wyzant is one-to-one tutors in 300+ subjects who see your actual work, and it was the only service where our essay questions got real feedback. It has no free tier, no textbook solutions and no AI assistant. Grammarly is the cheap, always-available version of part of that feedback.

Against Chegg Study (7.9, $15.95/mo, Study Pack $19.95/mo), Grammarly wins on writing and loses on breadth: Chegg has step-by-step solutions for 9,000+ textbooks, expert Q&A, an AI assistant with expert verification, and a limited free tier.

Against Photomath (7.7, free with Plus at $9.99/mo), there is no overlap at all — Photomath is math only, from arithmetic to calculus, with a solver that explains steps.

Where does Grammarly fall short?

Coverage. It is writing only, and in a category where the leaders cover math, science and humanities, that single fact explains the ranking. There are no textbook solutions, no live tutors and no practice tests.

The second problem is integrity. The AI rewrite features blur the line on academic integrity — a tool that rewrites your sentences for you is not the same as one that shows you why a sentence was wrong. Use the suggestions as feedback, not as a substitute for your own writing.

Third, price. Pro is $30 month to month, so the $12/mo figure depends on paying yearly.

Is Grammarly worth the price?

Pro starts at $12/mo billed yearly, and there is a free tier that is genuinely useful. On our value criterion it took 14 out of 20 — monthly price and what the free tier gives. The month-to-month Pro price of $30 is the number to watch if you only need it for one assignment.

For the money you get the writing feedback, the citation generator and the plagiarism check on Pro, and the browser, desktop and mobile keyboard apps. You do not get math, science, textbook solutions or tutoring, because those are not what this tool is.

Who should buy Grammarly?

Every essay before it is submitted. That is the use case, and it is a real one: if your homework includes written answers, Grammarly is the tool that improves them rather than writing them for you. Students from high school to professional level who need a second pair of eyes on grammar, clarity and tone will get their money's worth from the free tier alone, and Pro if they want the citation and plagiarism tools.

If your homework is math or science, this is not the tool — look at the coverage leaders instead. But for the essay half of homework, it earned its 7.1.