Verdict
Grammarly catches typos and missing commas reliably, and the free plan does that part without paying. PCMag gave it 4 out of 5 in January 2026 but found its AI writing bland and, in one test, it invented books a scholar never wrote. Long-time users in user reviews say 2026 updates made the suggestions worse, and Trustpilot reviews keep returning to unexpected renewals.
Best for
Catching typos in emails, forms and messages without copying text into another app
Skip if
Writers who want their own voice left alone, or anyone wary of annual auto-renewals
Key facts
- Category
- Writing, emails & letters
- Made by
- Superhuman Platform Inc. (formerly Grammarly Inc.)
- Based in
- United States
- Launched
- 2009
- Works on
- iPhone, Android, Web, Windows, Mac
- In the UK
- Yes
- Price from
- £12 a month
- Free plan
- Free plan checks spelling and grammar, shows tone and includes 100 AI prompts a month
Pricing
| Plan | Price | Billed |
|---|---|---|
| Pro (per member, billed monthly) | £12 | month |
| Pro (per member, billed annually) | £10 | month |
| Business (per member, billed monthly) | £33 | month |
| Business (per member, billed annually) | £28 | month |
What it does
- corrects spelling and grammar in 20+ languages
- detects tone and suggests rewrites
- rewrites and translates paragraphs
- writes text from prompts in any app
- checks for plagiarism and AI-generated text
- applies a team style guide and brand tones
Ratings
What people say
Store stars are high (4.6 on the UK App Store from 27,322 ratings) but user reviews in late 2026 is mostly long-time users saying the AI-first redesign made checking slower and suggestions worse; light users still like the free version as a spelling backstop. Trustpilot (3.1) centres on renewals and refunds, a big gap from the store stars.
“I use the free version of Grammarly and double check the suggestions they give.”
Individual user review, 22 August 2026 · source
“Grammarly, I have been using it almost since it became available.”
Individual user review, 23 August 2026 · source
“I despise this latest update which forces me to review my writing punctuation mark to punctuation mark instead of reviewing everything I highlighted at once.”
Individual user review, 22 September 2026 · source
“The paraphrased suggestions are laughably bad and downright wrong. At this point, the application is correcting for the sake of correction.”
Individual user review, 24 September 2026 · source
“I cancelled my paid subscription some time ago, and every so often I come back to this sub to remind myself of why I did.”
Individual user review, 28 September 2026 · source
Press reviews
- PCMag 2026-01-08
4.0 Excellent: superb at catching spelling and punctuation errors, though style suggestions aren't always useful and the AI generator hallucinated in testing.
- PCMag 2025-05-01
Grammarly is the best bet for a one-click rewrite of whole documents or specific paragraphs.
- TechRadar 2026-03-24
Reports the CEO admitting the Expert Review feature 'was not a good feature' amid a class action; the writer found suggestions less helpful as AI use grew.
- Tom's Guide 2025-10-29
News: the company renamed itself Superhuman; Grammarly stays as the writing tool inside a suite with Coda, Superhuman Mail and the Go assistant.
Privacy
- Trains on your data
- yes by default for Free, Premium and single-user Pro accounts ('Product Improvement and Training is on for individual users by default')
- Opt-out
- yes, toggle 'Product Improvement and Training' at account.grammarly.com/security/privacy (Free) or the data settings page (single-user Pro)
- Retention
- Documents saved in the Grammarly Editor are kept until the user deletes them; other text is processed 'as necessary to deliver' the service. The privacy policy gives no fixed periods.
- Incidents
- 2026: class action led by journalist Julia Angwin over the AI 'Expert Review' feature that used real experts' names without permission; feature removed, CEO called the suit 'without merit' (TechRadar, 24 Mar 2026; The Verge, 10 Mar 2026). Sep 2026 user PSA about messages sent to team users on cancellation (reached 395 points on Hacker News). No data breach found in searches of HN, TechRadar and Exa.
- Age limit
- 13+ under most US law, 16+ under EU law (terms s3.2); UK App Store rating 12+
Official videos
FAQ
Is Grammarly free?
Yes. The free plan checks spelling and grammar, shows the tone of writing and includes 100 AI prompts a month. Pro adds full-sentence rewrites, tone changes and plagiarism checks for £12 a month, or £10 a month paid yearly.
Is Grammarly now called Superhuman?
The company renamed itself Superhuman in October 2025. The writing tool is still called Grammarly and sits in a suite with Superhuman Mail, Coda and the Superhuman Go assistant.
Does Grammarly use my writing to train its AI?
For Free and single-user Pro accounts, yes by default. It can be switched off with the 'Product Improvement and Training' toggle in account privacy settings.
Grammarly or QuillBot?
PCMag's April 2026 test found QuillBot cheaper ($8.33 a month on annual billing against $12) and less pushy with upgrade prompts. Grammarly remains the stronger proofreader in most 2026 reviews.
Does Grammarly work on a phone?
Yes. On iPhone and Android it works as a keyboard that checks text in any app. It is rated 4.6 on the UK App Store and 4.4 on Google Play.
Scores are based on published evidence, not lab tests. How we score.
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