Grammar Guru
Grammar Guru: A low-cost grammar assistant with strong Windows tools but limited platform and language coverage. Ranked #19 of 88 in Grammar Checkers by our editors (6.8/10); pricing: Free plan; best for budget-conscious Windows users.
At a glance
- Editor score6.8 / 10
- PricingFree plan
- Best forBudget-conscious Windows users
- Free planYes
- Paid from$0.83/mo
- Tone detectionYes
- Facts checked21 Sep 2026
Where it wins
- Real-time grammar, spelling, punctuation, and style suggestions
- Windows app adds offline writing and practical AI tools
- Free plan and $1 monthly entry price support low-cost adoption
Where it doesn't
- No mobile app is available
- Browser-based AI services require an internet connection
- Platform and language coverage are limited
Our verdict on Grammar Guru
Grammar Guru is a freemium grammar checker and writing assistant for individuals, small teams, and larger organizations. Its Chrome and Edge extensions check grammar, spelling, and punctuation in real time across websites and text fields, including Gmail and Google Docs. It also suggests clearer, more concise writing and can rewrite text in different tones and styles. A native Windows app adds offline operation, email drafting, summarization, list formatting, and translation, making the product especially relevant to Windows users who want more than basic correction.
Pricing is straightforward for individual buyers. The Free plan costs $0 forever and includes basic grammar checking, five daily rewrites, a 500-character limit, and support across all websites. Standard costs $1 per month when billed monthly, or $0.83 per month when billed annually, and adds unlimited rewrites, advanced grammar rules, all writing styles and tones, batch processing, and priority support. The Windows App has the same monthly and annual prices and includes unlimited rewrites plus the Windows-specific writing tools. Enterprise adds team management, usage analytics, custom integrations, dedicated support, and an SLA guarantee. A 30-day refund period and no card requirement for trials reduce purchase friction.
The platform fit favors browser-based work and Windows desktops. Listed integrations include Gmail, Google Docs, Outlook, Office 365, and social media websites, while deployment is through a desktop app and browser extension. The Windows App is the clearest differentiator because it supports offline use, although browser-based AI services require an internet connection. Grammar Guru suits budget-conscious Windows users, browser-heavy writers, and teams needing rewriting or batch processing without a high entry price. Buyers needing mobile access or broader platform and language coverage should consider an alternative.
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Grammar Guru pricing
All 4 Grammar Guru plans and prices →
Grammar Guru fact sheet
| Free plan | Yes |
|---|---|
| Paid from | $0.83/mo |
| Browser extension | Yes |
| Desktop app | Yes |
| Mobile app | No |
| Style suggestions | Yes |
| Tone detection | Yes |
| Languages supported | Not verified |
| Money-back guarantee | 30 days |
| Deployment | Desktop, Browser extension |
| Platforms | Windows, macOS, Linux, Chrome extension |
| Support | |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 5 integrations: Gmail, Google Docs, Outlook, Office 365, social media websites |
| Pricing | Free plan (source) |
| Website | grammarguruai.com |
| Facts checked | 21 Sep 2026 |
Grammar Guru integrations
Grammar Guru lists 5 integrations on its own site.
- Gmail
- Google Docs
- Outlook
- Office 365
- social media websites
Alternatives to Grammar Guru
- GrammarlyA broad writing assistant with strong grammar, tone, rewriting, and AI coverage.9.4
- LanguageToolA broad multilingual checker with open-source and self-hosting options.9.2
- Microsoft EditorA strong Microsoft 365 writing assistant with focused platform coverage.9.0
See all Grammar Guru alternatives →
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Featured on iTechGuides
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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