Grammarly Review

Reviewed by Tom · Founder & lead reviewer

The problem it solves

Most writing advice assumes you sit down to write. Most writing does not work that way. It happens in a reply window at the end of a call, in a Slack thread, in a form field on a recruiter's portal, in a LinkedIn comment typed on a phone. The words that decide whether a client trusts you are rarely the words in a document you reread twice.

That is the gap Grammarly was built for. It is not a text editor you open; it is a layer that sits over the places you already type. The browser extension covers Gmail, Google Docs, LinkedIn and most web applications, desktop applications cover Windows and macOS, and a mobile keyboard covers the phone. The practical effect is that a quick Slack message gets checked by the same engine as a formal proposal.

Ubiquity, rather than any single feature, is what the product is actually selling. Competing tools can match the grammar engine. Far fewer follow you everywhere you write.

Who it is for

Three groups get disproportionate value here, and it is worth checking whether you are in one of them before paying.

The first is anyone whose income depends on written polish across many surfaces: salespeople, recruiters, agency account managers, consultants, support leads. These are people who write dozens of short, consequential messages a day in half a dozen different tools, where copying text into a chatbot and pasting it back would break concentration repeatedly.

The second is people writing in English as an additional language. The suggestions here explain themselves rather than silently rewriting, which makes the tool function partly as a teacher. Over months that compounds into writing you no longer need the tool for.

The third is people who are simply fast and careless typists and know it.

If you are none of those, and nearly all your writing happens inside one application that already has an assistant built in, the case thins out considerably.

How the pricing is structured

There are three bands. A free tier handles grammar, spelling and punctuation. Premium adds clarity rewrites, conciseness suggestions, vocabulary variety, tone adjustment and a plagiarism checker. Business adds team-level features such as shared style guides and usage analytics, priced per seat.

The published entry point for Premium is around twelve dollars a month on annual billing, with a noticeably higher figure if you pay monthly. We could not confirm that against the live pricing page for this update, so treat it as a starting point and read the current page before you commit.

What matters more than the number is what pushes you up a band. Individuals move from free to Premium for rewriting rather than correction. Organisations move from Premium to Business for consistency rather than capability: one agreed style, enforced across everyone, with visibility into whether it is being followed. If nobody in your company has ever asked for a style guide, you probably do not need the higher band.

Day-to-day use

The texture of the product is a small indicator in the corner of whatever you are typing in. Underlines appear as you write; a panel opens when you want detail. Accepting a suggestion is one click, and the suggestion explains itself if you hover.

The pattern most people settle into is to accept correctness suggestions automatically and treat style suggestions as a prompt to think rather than an instruction to obey. That distinction turns out to be the whole skill of using the tool well.

Friction shows up in two predictable places. Rich web editors that do their own text handling can conflict with the extension, producing lag or duplicated characters, and the fix is usually to disable Grammarly for that one domain. The second is cumulative: a tool that comments on every sentence can make writing feel supervised. Some people find that steadying and some find it paralysing, and that is a temperament question no review can answer for you.

What the free tier covers, and where it stops

The free tier is genuinely useful, which is both a credit to the product and the main obstacle to upgrading. Grammar, spelling and punctuation are covered properly, and for a great many people that is the entire job.

The boundary is drawn deliberately rather than technically. Free users are shown that a clarity or conciseness improvement exists without being shown what it is. Some find this a fair preview of value; others find it irritating by design, and that reaction appears often enough in public feedback to count as a known characteristic rather than an individual complaint.

The useful way to read the boundary is as a diagnostic. Spend a week on free and count how many times you are told a Premium suggestion is waiting. If the counter stays low, your writing is already clean and the upgrade buys you little. If it is constantly flagging rewrites you would want to see, the paid tier is addressing a real problem rather than an invented one.

Tone detection and the generative rewrites

Two features sit above basic correction and account for most of the paid value.

Tone detection reads a draft and tells you how it is likely to land - direct, confident, uncertain, formal. This sounds like a novelty and is not. The most expensive writing mistakes in professional life are tonal rather than grammatical: the email that reads as curt when you meant brisk, the apology that reads as defensive. Having a second opinion before sending is worth more than another comma check.

The generative layer lets you instruct instead of edit: shorten this, make it more formal, draft a reply to this thread. The quality is competent rather than remarkable, and that is the honest framing. It is not better than a general-purpose chatbot at writing from scratch. It is better positioned, because it works inside the window you are already in. Convenience is the feature, and for high-volume correspondence convenience is not a small thing.

The sameness problem nobody warns you about

This is the criticism that deserves more weight than it usually gets, and it is a reason the score here is not higher.

Grammarly's style suggestions have a direction. They favour shorter sentences, plainer words, fewer hedges, and a neutral register. Each individual suggestion is defensible. Applied wholesale, across every sentence, they converge on a single voice: clear, inoffensive, and indistinguishable from the writing of everyone else who accepted every suggestion.

For transactional writing that is a feature. Nobody wants a distinctive voice in a shipping-delay notification. For anything where the writing is part of why people read you - a newsletter, a personal brand, a bid that needs to feel human - it is a real cost.

The discipline is to treat the suggestion panel as advisory and to notice when you are clicking accept out of momentum. Writers who have a voice should expect to reject a meaningful share of what they are shown.

Teams, style guides, and the Business tier

The team story is less about writing quality and more about consistency, and it is worth separating the two.

Business-tier features let an organisation define preferred terminology, banned phrases, product-name capitalisation and tone, then apply that definition inside everyone's browser. For companies where support, sales and marketing currently spell the product three different ways, this is the mechanism that fixes it without a weekly reminder. Usage analytics show whether the guidance is actually being followed.

The honest caution is that this only pays off where inconsistency is costing something visible. A five-person team that already sounds coherent is buying administration rather than improvement. The question to ask before upgrading is whether anyone has complained about inconsistency, not whether consistency sounds desirable in principle.

For anything involving confidential material, check the current data-handling documentation yourself. A tool that reads everything you type is one where the processing terms deserve a careful look rather than an assumption.

Alternatives and adjacent tools

The closest comparison on this site is QuillBot, which approaches the same territory from the rewriting end rather than the correction end: paste a passage, get variants in different registers. It is the better choice for people who want paraphrasing and study-oriented features rather than a background corrector. Jasper AI and Writesonic are a different category again - they generate marketing copy from briefs instead of improving text you already wrote - and anyone weighing those two directly should read Jasper AI vs Writesonic.

The alternative most people overlook is the assistant already included in the suite they pay for. If essentially all your writing happens inside Google Workspace or Microsoft 365, the built-in features may cover enough of the same ground to make a second subscription hard to justify.

For the wider landscape of writing tools and where each one fits, see our guide to AI writing tools.

Common questions

Is the free version enough? For correctness, usually yes. The upgrade is for rewriting and tone, not for catching typos.

Does it work offline? The desktop applications need a connection for the checking engine, so treat it as an online tool.

Will it make my writing sound robotic? Only if you accept every suggestion. Used selectively it does the opposite, because it removes the clutter that obscures your actual voice.

Does the plagiarism checker replace academic tools? No. Institutions use their own systems, and a Premium check is a self-review step rather than a substitute.

Is it worth it alongside a chatbot subscription? That depends on how many separate applications you write in. One or two, probably not. Six or seven, the lack of copy-pasting is the entire argument.

How should I decide? Run Premium for one billing period and count accepted suggestions. That number is a better guide than any review, including this one.

Should you buy it?

Grammarly earns a strong ease-of-use score because it is close to frictionless, and a lower value score because the market around it has changed. When it launched, inline rewriting was unusual. It no longer is, and the subscription now has to justify itself on convenience rather than capability.

Buy Premium if written communication is a material part of how you are judged and it happens across many separate tools. Buy it if English is an additional language for you and you want explanations rather than silent corrections. Buy Business if inconsistent terminology across teams is an actual, named problem in your organisation.

Stay on free if you mainly need typo-catching. Skip it entirely if nearly all your writing lives in one suite with assistance already built in.

And whichever tier you land on, keep rejecting suggestions. The tool is at its best as an editor you argue with, not one you defer to.

Best for

Professionals who write all day in email, docs, and chat and want every message checked without switching tools.