Best for: Anyone writing English daily who wants corrections without leaving their app
Still the most practical English editor because it works where you already type. Take the annual plan or stay on free: at $30 a month it stops being good value against a general assistant that also writes.
- Who it's forIndividuals, Students, Freelancers
- Not ideal forWriting in languages other than English
- Price from$30/mo · free plan
- In category#1 of 5 in Writing · category median $20/mo
What is Grammarly?
Grammarly corrects your writing where you write it. The browser extension and desktop app sit on top of Gmail, Google Docs, Word, Slack, LinkedIn and most text fields on the web, underlining mistakes and offering a replacement you accept with one click.
That placement is the product: there is no copy-paste step and no separate editor to open. Beyond spelling and grammar, it reads tone and tells you when a message that felt neutral will land as blunt.
Rewrite suggestions shorten a paragraph, make a sentence more direct or adjust formality for the audience. The free plan covers spelling, grammar and tone detection plus 100 AI prompts a month, which is enough for occasional editing.
Pro raises that to 2,000 prompts per member, adds full-sentence rewrites, plagiarism detection and an AI-content check, and lets you fix one style guide and one brand tone so a small team writes the same way.
Enterprise adds SAML single sign-on, SCIM provisioning, data loss prevention, customer-managed encryption keys and unlimited style guides.
The billing deserves a look before you subscribe: Pro is $12 per month only if you pay $144 for the year, and $30 per month if you pay monthly.
Made by GrammarlySan Francisco, USAFounded 2009
Grammarly key features
Works inside other apps
A browser extension and desktop app apply the same suggestions in Gmail, Google Docs, Word, Slack and most web text fields.
Tone detection
Reads the tone your draft will convey and flags when a message reads as blunt or uncertain.
Full-sentence rewrites
Rephrases a whole sentence for clarity, length or formality instead of only fixing the error.
Plagiarism and AI detection
Checks a document against web sources and estimates how much of it reads as machine-written.
Style guide and brand tone
Pin house rules and a brand voice so everyone on the plan gets the same corrections.
Generative prompts
100 AI prompts a month on the free plan, 2,000 per member on Pro, for drafting and reworking text in place.
Grammarly pricing and plans
Free
Free
- Spelling and grammar corrections
- Tone detection
- 100 AI prompts per month
Pro
$30/month
- $12 per month if billed annually at $144
- $60 for three months on quarterly billing
- 2,000 AI prompts per member
- Full-sentence rewrites
- Plagiarism and AI detection
- 1 style guide and 1 brand tone
- Priority support
Pricing checked on August 26, 2026.See Grammarly's pricing page
Grammarly pros and cons
Pros
- Corrections appear in the app you already write in, with no copy-paste step
- Free plan is usable indefinitely, not a trial
- Tone detection catches messages that read harsher than intended
- Style guide and brand tone keep a small team consistent
Cons
- English only, which rules it out for multilingual teams
- Monthly billing at $30 costs two and a half times the annual rate
- Suggestions flatten voice in creative writing if you accept them all
Grammarly platforms, API and integrations
7 platforms
- Web app
- Windows
- macOS
- iOS
- Android
- Chrome extension
- Firefox extension
API not available
No public API. Automate through the integrations below or the web app only.
4 integrations
- Google Docs
- Gmail
- Slack
- Microsoft Teams
1 language
English
Inputs and outputs
Accepts TextProduces Text
2 AI models
Proprietary, GPT
Is Grammarly secure? Privacy, compliance and support
Data privacy
- May train on user data (check opt-out settings)
- Retention: De-identified text may be used to improve the product on Free and Pro; Enterprise text is excluded and covered by data loss prevention controls
- Data region: US
Compliance
- SOC 2
- GDPR
- CCPA
Team features
- SSO: yes
- Team workspace: yes
Support channels
- Documentation
- Community
- Dedicated manager
Who is Grammarly best for?
Anyone writing English daily who wants corrections without leaving their app. Grammarly targets individuals, students, freelancers, small and mid-size businesses, enterprises.
Use cases
Categories
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Grammarly FAQ
Is Grammarly free?
Yes. The free plan covers spelling, grammar, tone detection and 100 AI prompts a month, with no time limit and no card required.
How much does Grammarly Pro cost?
$30 per month on monthly billing, or $12 per month if you pay $144 for a year upfront. A quarterly option costs $60 for three months.
Does Grammarly work in Google Docs and Gmail?
Yes, through the browser extension. It also works in Word, Outlook, Slack, LinkedIn and most text fields on the web, plus a desktop app on Windows and macOS.
Does Grammarly check for plagiarism?
On Pro and Enterprise. It compares a document against web sources and adds a separate estimate of how much of the text reads as AI-generated.
Does Grammarly support languages other than English?
No. Corrections and rewrites are English only, across American, British, Canadian and Australian variants.