Grammarly
AI writing assistant for grammar, tone and clarity
- Category
- Writing & Content
- Pricing
- Free tier available; Pro from $12/mo (billed annually; $30/mo billed monthly)
- Best for
- Grammarly is best suited to students, professionals and teams who write daily across many different apps and want reliable in-line grammar, tone and clarity checking without switching tools — its free tier alone is worth having for most casual users, and Pro is a reasonable upgrade for anyone doing high-volume professional writing.
- Official site
- www.grammarly.com
- Last updated
- August 2026
Grammarly is an AI-powered writing assistant that checks grammar, spelling, tone and clarity in real time across browsers, desktop apps, mobile keyboards and integrations like Google Docs and Microsoft Office. Founded in 2009, it is one of the longest-running and most widely adopted AI writing tools, used by more than 40 million people and 50,000+ organizations.
Its core differentiator versus AI content generators like Jasper or Copy.ai is that Grammarly is an in-line editing layer rather than a generation tool — it works on top of writing a user is already doing, wherever they're doing it, instead of producing new drafts from prompts. In October 2025 its parent company rebranded to Superhuman, unifying Grammarly with the Superhuman email client and Coda under a broader "AI productivity platform" umbrella, though the Grammarly product itself keeps its name and standalone plans.
Grammarly is best suited to students, professionals and teams who write daily across many different apps and want reliable in-line grammar, tone and clarity checking without switching tools — its free tier alone is worth having for most casual users, and Pro is a reasonable upgrade for anyone doing high-volume professional writing. It is a weaker fit for writers who want an AI tool to generate long-form drafts from scratch (a generative tool like Jasper or Copy.ai is a better match) or for advanced creative writers wary of AI suggestions homogenizing a distinctive personal voice.
Key features
Real-time grammar and spelling correction
Flags and fixes grammar, punctuation and spelling mistakes as the user types, across virtually any text field via browser extension, desktop app or mobile keyboard.
Tone detection and adjustment
Analyzes the emotional tone of a draft and, on paid plans, offers full-sentence rewrites to shift tone (e.g. more confident, more formal).
Full-sentence rewrites and fluency suggestions
Suggests complete sentence rewrites for clarity and, for non-native English writers, corrects fluency issues beyond simple grammar fixes.
Plagiarism and AI-content detection
Scans text against a large database to flag potential plagiarism and detect AI-generated content, included on Pro and Enterprise plans.
AI prompts / AI Chat
A generative AI assistant that can draft, brainstorm and rewrite content on request, with a monthly prompt allowance that scales by plan.
Style Guide and Brand Tones
Lets teams codify house style rules and brand-specific tone profiles so suggestions stay consistent with organizational standards.
Broad app and platform coverage
Works across desktop, browser extensions (Chrome, Safari, Firefox, Edge), mobile (iOS/Android) and native integrations with Word and Google Docs.
Enterprise-grade security and admin controls
Enterprise plan adds SSO/SAML, SCIM, BYOK encryption, data loss prevention, custom roles and audit logging for regulated organizations.
Pricing breakdown
Free
- Write without spelling and grammar mistakes
- See your writing tone
- 100 AI prompts per month
- Browser, desktop and mobile access
Pro
- Everything in Free
- Full-sentence rewrites
- Tone adjustment
- Fluency suggestions for English
- Unlimited personalized suggestions
- Plagiarism and AI-content detection
- 2,000 AI prompts per member per month
- Team features: Style Guide, Brand Tones, Knowledge Share, Snippets
Enterprise
- Everything in Pro
- Proactive AI that works everywhere
- Dedicated support
- SAML SSO and SCIM
- BYOK encryption and data loss prevention
- Custom roles and permissions
- Unlimited AI prompts per member per month
Pros and cons
Pros
- Grammar and tone suggestions are widely regarded as highly accurate, and the tool works consistently across almost any app or website via its browser extension
- The free tier is genuinely useful on its own — it catches real errors and shows tone with no cost — making it a low-risk entry point
- Enterprise-grade compliance (SOC 2 Type 2, SSO, SCIM, BYOK, DLP) makes it viable for regulated organizations, not just individual writers
- Plagiarism and AI-content detection are bundled into Pro, saving a separate subscription for many users
- Extremely large, mature review base gives high statistical confidence in its ratings
- Broad platform coverage (desktop, mobile keyboard, Word, Google Docs, browser) means suggestions follow the user across nearly every writing surface
Cons
- The October 2025 corporate rebrand to "Superhuman" and bundling with the Superhuman email client and Coda has added confusion to what used to be a simple single-product pricing page
- Some writers report that Pro suggestions can flatten personal voice and style, particularly for creative writing where mechanical correctness isn't the only goal
- Performance can be inconsistent in specialized writing environments compared to browser-based use
- The built-in plagiarism checker is considered less robust than dedicated plagiarism-detection tools by some reviewers
- Team/business pricing rises quickly at scale under the newer Superhuman Suite business tiers, a meaningful jump from the $12/mo individual Pro price
- AI suggestions can occasionally feel overly rigid or generic, requiring the user to reject and manually rewrite rather than accept as-is
What reviewers say
Grammarly is one of the most consistently well-reviewed tools in this category, holding 4.7/5 on both G2 and Capterra, with sentiment breakdowns showing well over 95% positive/neutral. Reddit discussion is more mixed but still largely favorable: many users say the always-on correction across apps alone justifies the price, while a recurring critique is that Premium/Pro suggestions can over-correct or flatten a writer's natural voice, and that friction appears in non-browser writing environments.
Frequently praised
- Consistently accurate grammar, spelling and tone suggestions
- Works seamlessly across a huge range of apps via the browser extension
- Strong enterprise security and admin tooling for larger organizations
Frequently criticized
- Suggestions can flatten personal writing voice or style, especially for creative writers
- Inconsistent performance in some specialized or desktop writing tools
- Plagiarism checker seen as less thorough than dedicated tools
- Team/business pricing scales up quickly beyond the base Pro plan
Alternatives to Grammarly
Frequently asked questions
How much does Grammarly cost?
Grammarly is free for basic grammar/spelling/tone checking. Pro costs $12/month billed annually (or $30/month billed monthly) and adds full-sentence rewrites, plagiarism/AI detection and unlimited suggestions. Enterprise is custom-priced and sold through Superhuman Go.
Is the Grammarly free plan good enough, or do I need Pro?
The free plan catches genuine grammar and spelling errors and shows tone, which is enough for casual users. Pro is worth it if you want full-sentence rewrites, tone adjustment, plagiarism/AI detection, or need it for professional/academic writing where those features matter.
What happened to Grammarly Business?
Grammarly Business was retired and merged into the unified Pro plan, which now supports teams as well as individuals. Larger organizations needing SSO, SCIM or custom security controls now go through the Enterprise tier.
Why is Grammarly now called Superhuman?
In October 2025, Grammarly's parent company rebranded itself as Superhuman after acquiring the Superhuman email client and the Coda work platform, positioning itself as a broader AI productivity company. The Grammarly product itself keeps its original name and pricing structure.
Is Grammarly worth it for students?
For most students, yes — the free plan alone catches common mistakes, and Grammarly offers education discounts for the paid Pro tier for students who want tone adjustment, fluency help or plagiarism checking.
How does Grammarly compare to using ChatGPT for editing?
Grammarly's advantage is that it works passively, in-line, across virtually every app you already write in, rather than requiring you to copy/paste text into a separate chat window — for many users that integration alone justifies the subscription over a general-purpose AI chatbot.
Ready to try Grammarly?
Head to the official site to explore pricing and start a free trial where available.
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