Writing assistant that checks grammar and tone across apps, with AI agents and plagiarism detection.
Top-rated in AI Writing Tools#1 of 7 in AI Writing Tools by Overall Score
Grammarly checks spelling, grammar, clarity and tone as people type, through browser extensions, Windows and Mac desktop apps that work across other applications, and mobile keyboards for iOS and Android. Real-time spelling and basic grammar checks cover more than 20 languages, while advanced clarity, fluency and tone suggestions are limited to English, Spanish, French, German, Portuguese and Italian. Inside its own docs editor, a side panel of agents handles specific jobs: Proofreader, Paraphraser, Reader Reactions, Citation Finder, AI Grader, AI Detector, Plagiarism Checker and Humanizer. Generative AI prompts are metered monthly by plan. Pro adds full-sentence rewrites, tone adjustment, plagiarism and AI-text detection, a style guide, a brand tone, snippets and Knowledge Share. Enterprise adds SAML single sign-on, SCIM, data loss prevention, bring-your-own-key encryption, custom roles and an audit logs API.
Grammarly works at the point of writing across supported apps, making it different from a content production system built around campaign briefs. Its business capabilities provide writing guidance for teams, although an organization still needs its own review procedures for facts and policy claims and should not rely on suggestions alone.
Calculated from facts we verified on Grammarly's own website, using published thresholds. Nobody can pay to change it. Together with Market Signal it makes the Overall Score of 80 that orders our lists.
Dimensions without verified data count as a neutral 2.5. Facts checked October 13, 2026. How the rating works
Computed from Ahrefs + Semrush data about Grammarly's own website. Not an assessment of the product itself. How this works →
Market Strength
91
Where it stands today
Momentum
51 Declining ↓↓
Where it’s heading
Data Confidence
Medium
How much to trust it
Tick mark = category average.
Compared with 26 tracked Content Marketing tools. Data through September 2026, pulled October 6, 2026.
| Plan | Monthly | Annual (mo) |
|---|---|---|
| Pro | $12 | Not listed |
| Enterprise | Custom | Custom |
Pricing shown reflects list prices as of our last check and may have changed. Confirm current pricing on Grammarly's website before purchasing.
No major integrations documented.
Help center
Why choose it: Students, researchers and content writers who rework existing drafts and want rewriting, summaries and citations in the same toolkit.
Strengths
Limitations
Why choose it: Novelists, fiction writers, and long-form authors who want detailed style analysis inside their existing writing workflow.
Why choose it: Marketing teams that need AI-generated content to stay consistent with documented brand voice, style and visual rules.
Strengths
Limitations
Why choose it: Sales and marketing operations teams that want to turn repeatable research and content processes into AI workflows tied to their CRM.
Strengths
Limitations
AI search visibility platform for tracking brand presence and improving discoverability in AI answers.
Content optimization platform with a live Content Score editor, Content Audit and AI Tracker.
AI-driven content strategy and topic modeling platform.
Yes, Grammarly offers both a free plan and a free trial of its paid tiers.
Grammarly starts at $12/mo on its Pro plan. Pricing was last checked September 28, 2026. Always confirm current pricing on the vendor's site before purchasing.
Commonly considered alternatives include QuillBot, ProWritingAid, Jasper and Copy.ai. The Alternatives section on this page shows what each one is best at and its starting price.
