Grammarly
AI-powered writing assistant for clear, professional communication across 1 million+ apps
Grammarly is an AI writing assistant that catches grammar, spelling, and punctuation errors in real-time whilst providing tone detection, clarity suggestions, and AI-powered rewrites. Available as a free plan with basic corrections or Pro tier offering advanced features including plagiarism detection, AI text detection, and 2,000 monthly AI prompts for individuals and teams up to 149 members.
How we scored it
A weighted average of the 4 dimensions below, each judged 0–10 from published pricing, vendor documentation and independent user feedback. We do not run hands-on tests, and no vendor has any say in a score.
2 further dimensions are not scored for this product yet, so they are left out of the average rather than counted as zero. How the score works.
What it actually costs
Intro pricing shown — see the renewal note for what you'll pay after the introductory term. We don't hide the second-act price.
Free
Vendor page lists Free at $0/month with basic features; page does not specify whether Free is charged per member.
Pro (Monthly)
Price shown as "$30 when billed monthly"; site shows Pro described as "$12 USD / member / month, billed annually" and "$30 when billed monthly."
Pro (Annual)
Vendor states annual billing effective monthly price is $12 per member/month when billed annually.
What to check before you commit to Grammarly
A tool is judged on what it costs once it is adopted, not what it costs to try. These are the four things that change that number.
The price once it is adopted
At $12 a seat, five people is $60 a month ($720 a year) and ten is $120 ($1440 a year). Tools are bought one seat at a time and paid for by the dozen.
Where the usage ceiling sits
Credits, generations, exports and API calls are the lines that run out mid-month. Find what happens when you hit the cap — hard stop, throttle, or an overage rate you have not budgeted for.
What the free tier is really for
A free tier is an evaluation, not a plan. Check which limit you would hit first in real use, because that is the one that decides when you start paying.
Getting your work back out
Export formats decide how reversible this decision is. A tool that only exports to its own format costs more to leave than its price suggests.
These are the checks we apply across ai tools, in the same order, so two pages can be compared line for line.
How much does Grammarly really cost?
Our calculation from the vendor's published prices — not a figure the vendor advertises.
The headline price is for one person. Adding people multiplies it, so a team of ten pays ten times the advertised figure. Pricing is charged per member (seat); cost scales with number of members invited/added.
| Team size | Per month | Per year | Over 3 years | How it is charged |
|---|---|---|---|---|
| 1 person | $12 | $144 | $432 | $12 per seat per month |
| 5 people | $60 | $720 | $2,160 | $12 per seat per month |
| 10 people | $120 | $1,440 | $4,320 | $12 per seat per month |
| 50 people | $600 | $7,200 | $21,600 | $12 per seat per month |
Based on the Pro (Monthly) plan at $30 a month. Three years at the published annual price. No renewal increase is published.
- The vendor does not publish a renewal price, so three-year totals assume today's price holds.
Work out your own cost
- $30 per seat per month.
- Billed annually at $12 per month equivalent.
Grammarly against the field
The highest-scoring alternatives in the same category, compared on the figures we hold for all of them.
| GrammarlyThis page | ChatGPT | Google Gemini | |
|---|---|---|---|
| ReviewCost score | 8.3/10 | 8.3/10 | 8.1/10 |
| Cheapest plan | Free | — | — |
| From | — | — | — |
| Renews at | Not published | Not published | Not published |
| Biggest strength | Real-time detection across 400+ grammar and spelling rule types with multi-language support | Breadth of capabilities: text, code, images, voice, web browsing, file analysis, and agentic task execution in one interface | Fast, responsive performance deeply integrated with Gmail, Google Docs, Sheets, and Drive workflows |
| Biggest drawback | 150% price markup for month-to-month billing ($30) vs annual ($12/month); surprise auto-renewal charges when free trial lapses without cancellation | Free and Go tiers now include ads in US and EU markets; conversation data used for training by default (manual opt-out required) | Hallucinations and inconsistent outputs, especially on complex tasks requiring precise reasoning |
Prices are the published figures at the time of writing and change often. Renewal pricing is shown where the vendor publishes it. See how we review.
What people ask about Grammarly
Straight answers to what buyers actually ask, drawn from the documentation and published user reports.
Is Grammarly worth the upgrade from Free to Pro?
How does Grammarly's billing work, and what are the gotchas?
Does Grammarly work offline or without internet?
Is Grammarly's plagiarism detector accurate?
What languages does Grammarly support?
Page history
- Published
- 13 September 2026
- Last updated
- 1 October 2026
- Pricing checked against vendor
- 1 October 2026
Sources & verification
Pricing on this page was taken from the vendor's published pricing page on 1 October 2026.
- Updating the Grammarly Premium plan to the Grammarly Pro plan – Grammarly SupportOfficial documentation · Grammarly Support · read 1 October 2026
- Grammarly Pro: The Best Plan for Individuals & TeamsOfficial pricing page · Grammarly · read 1 October 2026
- Grammarly: Free AI Writing AssistanceOfficial pricing page · Grammarly · read 1 October 2026