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Grammarly
The ubiquitous AI writing assistant — grammar, clarity, tone, and generative help everywhere you type.
Editorially reviewedChecked Sep 2026How we review
Free plan API Teams Mobile app Browser extension
Security & compliance
Verified against each vendor's own trust page. Not legal advice — confirm current status with the vendor.
Toolglade’s take
The default writing assistant for millions — it works everywhere you type, and its generative features now go well beyond grammar fixes.
About Grammarly
Grammarly is an AI writing assistant that checks grammar, spelling, clarity, and tone, and now generates and rewrites text — working across browsers, documents, email, and apps.
Grammarly is the most widely used AI writing assistant, embedded across browsers, Microsoft Office, Google Docs, email, and countless apps so it's there wherever you write. Beyond its long-standing grammar, spelling, and clarity checks, it now offers generative AI to draft, rewrite, shorten, and adjust tone, plus features for teams to keep brand voice consistent. There's a capable free plan and paid Premium/Business tiers that unlock the advanced suggestions and generative features. Its combination of ubiquity, ease, and a strong free tier makes it the default for students, professionals, and teams alike.
Weighing your options?Compare Grammarly vs QuillBot (2026): Which Should You Use?, or see all Grammarly alternatives.
TL;DR
Grammarly is an AI-powered writing assistant that checks grammar, spelling, clarity, tone, and style across web browsers, desktop, and mobile. It works across many applications and websites through browser extensions and system integrations. The company has expanded from proofreading into generative AI writing assistance for individuals, teams, and enterprises. Grammarly reached roughly $700 million in annual recurring revenue in 2025.
Company overview
Grammarly was founded in 2009 by Max Lytvyn, Alex Shevchenko, and Dmytro Lider, with roots in Ukraine and headquarters in San Francisco. It began as an online grammar-checking service and grew into a broad writing-assistance platform used by millions of people.
Over time Grammarly added tone detection, full-sentence rewrites, and generative AI features, and expanded into business and enterprise offerings. In 2025 the company acquired the email client Superhuman and introduced bundled productivity tiers.
Product features
Grammarly provides real-time grammar, spelling, punctuation, clarity, and tone suggestions, along with generative AI features for drafting, rewriting, and summarizing text. It integrates across web apps, documents, and email through browser extensions, desktop apps, and mobile keyboards.
Business and enterprise plans add style guides, brand tones, analytics, centralized administration, and security controls such as SSO. The platform works across hundreds of thousands of applications and websites where users write.
Target market
Grammarly serves individual writers, students, and professionals, as well as teams and large enterprises that want consistent, high-quality communication and centralized controls. It spans consumer, education, and business markets.
Buyer personas
End users
Students, professionals, writers, and anyone drafting written communication.
Buyers
Individuals for personal plans; team leads, HR, IT, and communications leaders for business plans.
Key influencers
Educators, content and communications teams, and IT/security stakeholders.
Ideal customer profile
Professionals and organizations that want consistent, clear, on-brand writing with AI assistance across the tools they already use.
Funding & performance
Grammarly has raised substantial venture funding. It raised a $110 million round in 2017 led by General Catalyst and IVP, a $90 million round in 2019, and reached a $13 billion valuation in a 2021 Series C led by Baillie Gifford and BlackRock. In May 2025 it secured $1 billion in nondilutive, revenue-secured financing from General Catalyst's Customer Value Fund. Total equity and financing raised exceeds $1.5 billion.
Pros & cons
Pros
- Works virtually everywhere you type
- Strong free tier plus advanced generative features
- Team features for consistent brand voice
Cons
- Best rewriting and generative tools require Premium
- Suggestions can be conservative or repetitive
- Not a full long-form content platform like Jasper
Pricing plans
Free
$0 / month
- Grammar, spelling, and punctuation checks
- Basic tone and clarity suggestions
- Limited generative AI prompts
- Browser extension and web editor
- Works across many apps and sites
Pro
$12 / month
- Billed annually; higher month-to-month rate
- Advanced clarity, tone, and rewrite suggestions
- Generative AI writing and drafting features
- Full-sentence rewrites and vocabulary suggestions
- Plagiarism detection
- Custom style and tone options
Business
$15 / month
- Per-seat pricing billed annually
- Team style guides and brand tones
- Centralized admin and analytics
- SSO on eligible plans
- Generative AI for teams
- Priority support
Enterprise
Custom
- Custom pricing for large organizations
- Advanced security and compliance controls
- SSO and centralized administration
- Analytics and adoption reporting
- Dedicated support
Key features
API
Mobile app
Browser extension
Team collaboration
Integrations
Google Docs, Microsoft Word, Microsoft Outlook, Gmail, Chrome, Safari, Edge, Firefox, Slack
Input types
text
Output types
text
Best For
Grammar and spell checking, Tone and clarity improvement, AI writing assistance across apps
Compare key features
View all alternatives →Feature
Grammarly
Sudowrite
Copy.ai
Pricing
Freemium
Freemium
Paid
Free plan
Yes
No
No
Free trial
No
No
No
API
Yes
No
No
Team support
Yes
No
Yes
Frequently asked questions
Is Grammarly free?+
Yes, Grammarly has a strong free plan; Premium (from about $12/month) adds advanced suggestions and generative AI.
What does Grammarly do?+
Checks grammar, spelling, clarity, and tone, and helps draft and rewrite text across your apps.
Where does Grammarly work?+
In browsers, Microsoft Office, Google Docs, email, and most desktop and web apps.
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