Grammarly Verdict (2026)

Scores at a glance

Why C: Accurate, everywhere-at-once checking and a useful free plan, offset by terms that refund nothing, a monthly price that is high for what it adds, and constant upgrade prompts.

Overall is the weighted mean of the five rows, adjusted by a small slug-seeded offset so that brands never line up in a false staircase, and capped at 9.8. Full working on the Methodology page (v2.1).

What the research shows

1. Grammarly Pro lists at $12 per member a month billed annually, or $30 a month on monthly billing, a gap of more than double.
2. The terms state all payments are non-refundable and that partially used subscription periods earn no refund or credit, to the extent the law allows.
3. Promotional prices last one billing period and apply only to the first seat; renewals revert to the standard rate.
4. Free includes 100 AI prompts a month, Pro 2,000, and the app-store-only Premium plan 1,000 with no team features.
5. The company now trades as Superhuman, and the Enterprise plan is delivered through its Superhuman Go assistant.

What you are buying

Grammarly is a writing assistant that checks grammar, clarity and tone as you type, across a browser extension, desktop apps for Mac and Windows, a mobile keyboard, and add-ins for Word and Google Docs. The parent company now operates as Superhuman Platform, which also owns the Superhuman email app. There are three web plans: Free, Pro (for individuals or teams of up to 149 members) and Enterprise. A separate Premium plan is sold only through the Apple and Google app stores. Around the core checker sit a growing set of AI “agents” for rewriting, humanizing text and detecting AI writing, plus free tools for students such as a citation generator and the Authorship process record. The homepage claims 40 million users and 50,000 organizations.

The products, scored

6 items. Each chip is a per-product call and can differ from the brand verdict.

Grammarly Free BUY

Free checks spelling and grammar wherever you type and shows the overall tone of your writing, with 100 AI prompts a month for generating or rewriting text. For most people writing email and documents in English, this catches the mistakes that matter. What it withholds is the part Pro sells: full-sentence rewrites, tone adjustment and style guides. The cost is the nagging. A recurring Trustpilot and App Store complaint is that “Pro” suggestions pop up constantly and interrupt writing, which is the upgrade funnel at work rather than a bug.

StrengthReal grammar and spelling checks in every app, at no cost

WeaknessFrequent upgrade prompts interrupt the writing it is meant to help

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Grammarly Pro CONSIDER

Lists at $12 per member a month billed annually, or $30 on monthly billing. Pro adds full-sentence rewrites, tone adjustment, brand tones and style guides, snippets, team analytics and 2,000 AI prompts a month, and it works for a single person or a team of up to 149. The annual price is reasonable for someone who writes for a living. The monthly price is not, and the terms offer no refunds for unused time, so a mistaken annual purchase is a sunk cost. Promotional discounts apply to the first seat and first billing period only.

StrengthRewrites and brand tone controls that work across every app

WeaknessMonthly billing costs well over double the annual rate

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Grammarly Premium (app stores) SKIP

Sold only through the Apple App Store and Google Play. The iOS listing shows $29.99 a month, $59.99 a quarter and $139.99 a year, plus cheaper mobile-only plans at $17.99 a month and $83.99 a year. Grammarly’s own help page says Premium carries 1,000 AI prompts a month, half of Pro’s allowance, and lacks team features and admin controls. The yearly app-store price is also above Pro’s annual web price. Refunds go through Apple or Google, not Grammarly. There is no reason to buy this tier unless app-store billing is the only option you have.

StrengthConvenient app-store billing on a phone

WeaknessCosts more than Pro on the web and does less

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Grammarly Enterprise CONSIDER

Priced by sales and now delivered through Superhuman Go. It adds unlimited AI prompts and members, SAML single sign-on and SCIM, data-loss prevention, bring-your-own-key encryption, audit logs, custom roles and dedicated support. The homepage claims organizations save $5,000 per employee per year, a vendor figure with no published method behind it. For a company that already writes in many tools, central style guides and admin controls are useful. The DLP and BYOK options matter because the terms let Grammarly use content and suggestion feedback to improve its services.

StrengthSecurity controls including DLP, BYOK keys and audit logs

WeaknessNo public price; ROI claims are vendor figures

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AI Detector CONSIDER

A free tool that scores a pasted text or uploaded file for signs of AI generation; Pro adds an AI Detector agent with phrase-level explanations and rewrite suggestions. The page contradicts itself. It says no AI detector is 100 percent accurate and results should never be relied on alone, then lists “99% detection accuracy” as a feature. Teachers and editors should treat the score as a prompt for a conversation, not evidence. Students worried about false positives will find Authorship, below, a more useful tool than the detector.

StrengthFree, quick and accepts uploaded files

WeaknessMarketing claims 99 percent accuracy while disclaiming reliability

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Grammarly Authorship BUY

Available on Free and Pro, Authorship records how a document was written (typed, pasted from a website, or AI-assisted) and produces a report you can choose to share with a teacher or editor. It works in Google Docs through the browser extension, in Word through the desktop app, and in the Grammarly editor. Tracking is opt-in and the report is not sent anywhere automatically. The privacy FAQ describes the tracking more narrowly than the main page does, which is worth reading before switching it on. For students facing AI-detection disputes, it is the most practical tool Grammarly makes.

StrengthFree evidence of your own writing process

WeaknessPrivacy FAQ and feature page describe the tracking differently

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Policy table

Values are short phrases taken from the brand's own pages at the time of the last update. "Not stated" means the desk could not find the policy in writing.

Caveats

• The terms make every payment non-refundable and exclude refunds for partly used periods; several one-star Trustpilot reviews describe unexpected renewal or post-trial charges that were not returned.
• Promotional prices last one billing period and cover the first seat only, so the renewal bill can be far higher than the first one.
• Upgrade prompts inside the free product are frequent enough to be the leading complaint in recent reviews.
• Support is a web form with no published hours, and reviewers report difficulty reaching a human for billing disputes.

Sentiment from reviews

Grammarly’s Trustpilot score has slid to an “Average” 3.1, even though most of its very large review base is positive. The older reviews praise accuracy and how much time it saves non-native English writers. Recent reviews are harsher and fewer.

The recurring complaints are the constant prompts to upgrade, suggestions that are wrong or duplicate words, a redesign that added a chat panel some find cluttered, and a desktop app that one reviewer could not uninstall cleanly. Billing is the sharpest theme: charges after a free trial and refunds refused. Grammarly replies to about half of negative reviews, mostly with a templated link to support. The App Store listing holds a 4.7, though one recent reviewer called the app increasingly unusable after an update.

Rivals worth a look

Our call

Desk notes

• Read grammarly.com Pro, plans, homepage, AI Detector and Authorship pages in October 2026.
• Read Grammarly’s Terms of Service sections on billing, cancellation, fee changes and refunds in October 2026.
• Read Grammarly help articles on Pro plans and on billing errors and auto-renewal in October 2026.
• Read the Trustpilot profile for grammarly.com and the iOS App Store listing in October 2026.

Desk research only: the brand's own site and support pages plus published customer reviews. Nothing was purchased or tested by this site. Scored under Methodology v2.1.