Overview
Grammarly is an AI writing assistant that checks grammar, clarity and tone and can rewrite or generate text from prompts. It runs as a browser extension, desktop app and mobile keyboard, and works inside tools such as Google Docs and Microsoft Office. Newer agent features include a humanizer, an AI detector and reader-reaction feedback, and Grammarly is now part of Superhuman.
Label: Vendor-described — Captured from the vendor's own materials. Not independently verified.
Best for
- Individuals who want spelling, grammar and tone checks wherever they write
- Teams that need a shared style guide and brand tone (Pro)
- Larger organizations needing SSO, data loss prevention and audit logs (Enterprise)
Key features
- Real-time spelling, grammar and clarity corrections
- Full-sentence rewrites and tone adjustment (Pro)
- Plagiarism and AI-text detection (Pro)
- Generative AI prompts (100/month free, 2,000/month Pro)
- Team style guides, brand tones, Snippets and analytics
- Works in browsers, desktop apps, Microsoft Office and Google Docs
What it does
- Grammar, clarity and structure proofreading
- Tone suggestions aligned to a brand style guide
- Paragraph rewrites
- Prompt-based text generation
- AI Detector and Humanizer agents
- Reader Reactions feedback
Use cases
- Write blog posts that rank in search — Proofreading and clarity rewrites for the final edit.
- Write marketing copy in your brand voice — Proofreads and suggests tone changes aligned to a brand style guide.
Drawbacks & cautions
- Free plan is limited to 100 AI prompts per month
- Pro is capped at 2,000 AI prompts per member per month
- Enterprise pricing is not published
What users say
Across Capterra, G2 and Software Advice, users find Grammarly easy to use and reliable for everyday grammar and clarity fixes, though many call Premium pricey. Trustpilot is more mixed, citing renewals, upgrade prompts and suggestions that miss context.
What people like
- Catches spelling, grammar and clarity issues in real time capterra.com, uk.trustpilot.com, softwareadvice.com
- Works across browsers, email, document editors and messaging apps capterra.com, softwareadvice.com
- Helps non-native English speakers write with more confidence capterra.com, softwareadvice.com
Common complaints
- Premium is costly for individuals and small teams, and key features are paywalled capterra.com, softwareadvice.com
- Suggestions can miss context or make writing too formal and generic capterra.com, uk.trustpilot.com
- Pop-ups and upgrade prompts interrupt typing capterra.com, uk.trustpilot.com
- Unexpected renewals and hard cancellations reported on Trustpilot uk.trustpilot.com
Scores are shown as each site published them on the date checked. They come from those sites' reviewers, not from us, and they never affect our rankings. Ratings based on fewer than 10 reviews are left out. The summaries are our own words, gathered Oct 22, 2026; follow the links to read the reviews.
Alternatives
- ChatGPT — General-purpose AI chat assistant for writing, research, analysis, images and coding
- Copy.ai — GTM AI platform for sales and marketing workflows, agents, chat and content creation
- Jasper — AI marketing platform with brand-aware agents for content, campaigns and AI search optimization
- Surfer — Optimize content for Google and AI search with a content editor, audits and AI visibility tracking
Evidence
| Fact | Label | Source | Observed |
|---|---|---|---|
| capabilities | Vendor-described | www.grammarly.com | Oct 17, 2026 |
| pricing | Vendor-described | www.grammarly.com | Oct 17, 2026 |
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