Grammarly
FreemiumAI writing assistance
About Grammarly
Grammarly is a writing assistant that checks grammar, spelling, punctuation, clarity, and tone across virtually every web surface via browser extension. Free tier covers basic corrections; Pro at $15/mo adds full-sentence rewrites, tone adjustment, and AI writing prompts. The Business plan at $15/user/mo adds team features and brand tone settings. The browser extension works in Gmail, Google Docs, LinkedIn, Slack, and most web inputs. The desktop apps (Mac/Windows) extend coverage to native applications. The free tier catches most errors that matter. Main limitations: the AI writing features are less capable than Claude or ChatGPT for generating long-form content; heavy use pushes writing toward a homogenized, corporate-safe style that loses individual voice; and text is processed on Grammarly's cloud servers. Reddit writing communities note Grammarly is sometimes over-aggressive about stylistic suggestions that are actually intentional. LanguageTool is the open-source self-hostable alternative. For professionals who need reliable correction across every app they use without switching contexts, Grammarly Pro is the most convenient option at a reasonable price.
Key Features
Pricing Plans
Verified April 2026Free
- Basic grammar
- Spelling
- Punctuation
Pro
- Full-sentence rewrites
- Tone adjustment
- AI writing assistant
- 2000 AI prompts
Business
- Team features
- Brand tones
- Analytics
Pros
- Excellent corrections
- Works everywhere
- Tone detection
- AI assistance
Cons
- Free tier limited
- Can be aggressive
- Cloud-based
- May homogenize style
Best For
- Professionals writing in English as a second language who need reliable corrections
- Business writers who draft emails, reports, and proposals across multiple apps
- Teams that want consistent tone and style enforced across all written communication
Not Ideal For
- Creative writers who need to preserve voice -- Grammarly tends to homogenize style
- Users with privacy requirements -- all text is processed on cloud servers
Potential Deal Breakers
- All text is processed on cloud servers -- a concern for sensitive or confidential documents
- Can aggressively suggest stylistic changes that are intentional writing choices
- AI generation at $15/mo is poor value compared to Claude or ChatGPT at the same price
Data & Privacy
Grammarly processes all text you type in real-time on their servers. They state they do not sell user data and do not use customer text to train models by default. Enterprise and Business plans offer enhanced privacy controls. The browser extension has broad page access permissions which raises concerns about sensitive data exposure. SOC 2 Type 2 certified.
Who Is This For?
Hands-on tested May 2026
Signup Experience
Email signup with immediate browser extension installation prompt. Free tier catches basic grammar and spelling errors. The browser extension works across all websites — Gmail, Google Docs, social media. Setup is under 2 minutes.
For Home Users
Free tier is genuinely useful for everyone — catches embarrassing typos in emails and social posts. Premium at $30/mo is expensive for personal use unless you write professionally. The tone detection and rewrite suggestions are helpful but not essential for casual writing. Best free writing tool available.
For Business Users
Business plan at $25/user/mo adds brand tone, style guides, and analytics. Valuable for companies where written communication quality matters — customer support, marketing, sales teams. The AI writing features compete with ChatGPT but are better integrated into existing workflows. ROI is clearest for customer-facing teams where writing quality directly impacts revenue.
Our Verdict
Grammarly is the most convenient writing correction tool available -- the extension works everywhere, corrections are reliable, and the free tier is genuinely useful. The AI writing features at $15/mo are less capable than Claude or ChatGPT for generation, but the correction layer is still the best available for broad app coverage.