10 Best Grammar Checkers for 2026 (Free & Paid)
Discover the top 10 best grammar checkers for 2026. Compare features, pricing, and find the perfect tool to improve your writing quality today.

Discover the top 10 best grammar checkers for 2026. Compare features, pricing, and find the perfect tool to improve your writing quality today.

Finding the right grammar checker can transform your writing from error-prone to polished and professional. Whether you're crafting business emails, academic papers, or creative content, these AI-powered tools catch mistakes that even experienced writers miss.
A survey of 1 ,839 people found that 94% of U.S. respondents and 86% of non‑U.S. respondents pay attention to grammar and spelling when browsing online content.
The same survey reported that 97.2% of all respondents believe grammar mistakes influence their perception of a company, and 51.8% said such mistakes can ruin a company’s professional image.
Over 34.9% felt that grammar errors directly undermine a company’s credibility.
These figures suggest that, even among younger audiences, poor language use quickly tarnishes brand reputation.
To identify the best grammar checkers for 2026, we analyzed leading tools based on accuracy, feature sets, platform compatibility, pricing structures, and user reviews. We evaluated each tool's AI capabilities, integration options, language support, and specialized features like plagiarism detection and tone adjustment.
Our assessment prioritized tools that offer genuine value across different user segments, from students and freelancers to enterprise teams, while considering both free and premium options to accommodate various budgets and requirements.
Tool | Best For | Key Features | Pricing | Free Plan | Platforms |
|---|---|---|---|---|---|
Unlimited free grammar checks across multiple languages | AI-powered grammar and spell checking, Support for 6+ languages | Free to $19.95/month | Yes | Web, Chrome Extension, Word Add-in | |
Comprehensive writing assistance across 1M+ platforms | Works on 1M+ websites and apps, AI-powered tone and clarity suggestions | Free to $12/month | Yes | Web, Mac, Windows, Chrome, Safari, Firefox, Edge, iOS, Android | |
Multilingual grammar checking in 30+ languages | 30+ languages and dialects, Browser extensions for all major browsers | Free to $69.90/year | Yes | Web, Chrome, Firefox, Edge, Safari, Windows, macOS, Google Docs, Microsoft Word | |
Free grammar checking with educational explanations | Corrects over 90% of mistakes, Detailed error explanations | Free | Yes | Web, Chrome, Firefox, Microsoft Word, Microsoft Outlook, Google Docs, iOS, Android | |
Students needing essay scoring and IELTS practice | Automatic essay scoring, IELTS practice tests | Contact for pricing | No | Web | |
Academic writing with plagiarism and citation checking | Plagiarism detection, Citation generation (APA, MLA, Harvard) | Free with paid services | Yes | Web, Chrome extension | |
Content rewriting and paraphrasing for SEO | One-click text rewriting, Advanced paraphrase mode | $3 to $180 | Yes | Web, Chrome | |
AI-powered rewriting and tone adjustment | Paraphrasing and rewriting suggestions, Tone switching (casual to formal) | $6.99 to $9.99/month | Yes | Web, Chrome extension | |
Enterprise teams needing governance and AI agents | AI Agent creation and management, Enterprise governance and supervision | Contact sales | Yes | Web | |
Fiction writers and novelists seeking manuscript analysis | Manuscript analysis and chapter critique, Virtual Beta Reader | $12/month (billed yearly) | Yes | Web, Windows, Mac, Google Docs, Microsoft Office |
Best for Unlimited free grammar checks across multiple languages

QuillBot is a free AI-powered grammar checker that detects and corrects grammar, spelling, and punctuation errors across multiple languages and dialects. It helps professionals review and polish their writing while preserving their unique voice, with support for 6+ languages and integration across popular apps and websites.
With its highly-rated Chrome extension (4.7/5 rating, 5M+ users) and Word add-in, QuillBot makes it easy to check grammar wherever you write. The unlimited free grammar check sets it apart from competitors that limit free usage.
QuillBot offers a completely free plan with unlimited grammar checks. Premium plans start at $19.95/month or $8.33/month (billed annually at $99.95).
For more details, visit their pricing page.
Best for Comprehensive writing assistance across 1M+ platforms

Grammarly is an AI-powered grammar checker that detects grammatical errors, spelling mistakes, and punctuation issues while improving clarity and writing style. It works across 1 million+ websites, apps, and browsers on desktop and mobile devices, offering instant proofreading and advanced writing suggestions.
Grammarly's comprehensive platform includes tone suggestions, AI-powered paraphrasing, and fluency improvements that help you communicate more effectively. With browser extensions for Chrome, Safari, Firefox, and Edge, plus integrations with Microsoft Office and Google Docs, Grammarly meets you wherever you write.
Grammarly offers a robust free plan with basic grammar and spelling checks. The Pro plan starts at $12/month (billed annually) and includes advanced features like tone detection, clarity improvements, and plagiarism detection.
For more details, visit their pricing page.
Best for Multilingual grammar checking in 30+ languages

LanguageTool is an AI-based grammar checker that detects and corrects grammatical errors, spelling mistakes, and style issues across 30+ languages. It offers a free web editor, browser extensions, and desktop integrations for a distraction-free writing experience with advanced suggestions.
Trusted by 2000+ organizations, LanguageTool is privacy-focused and offers extensive language support that makes it ideal for multilingual writers. With integrations for Microsoft Word, Google Docs, and Outlook, plus browser extensions for all major browsers, LanguageTool provides comprehensive grammar checking wherever you work.
LanguageTool offers a free plan with basic grammar checking. Premium plans start at $5.83/month (billed annually at $69.90) and include advanced style checking, Picky Mode, and extended character limits.
For more details, visit their pricing page.
Best for Free grammar checking with educational explanations

Scribens is a free, AI-powered grammar and spelling checker that detects and corrects over 90% of writing mistakes across multiple languages. It provides detailed explanations for each error to help users learn, and integrates seamlessly with popular apps like Gmail, Word, Google Docs, and social media platforms.
What sets Scribens apart is its educational approach, each correction comes with detailed explanations that help you understand grammar rules and improve your writing skills over time. With support for 30+ languages and integrations across desktop and mobile platforms, Scribens is particularly valuable for students and non-native English speakers.
Scribens offers a completely free plan with up to 8,000 characters per day and 50,000 characters per single check. Premium pricing is not publicly disclosed on the homepage.
For more details, visit their website.
Best for Students needing essay scoring and IELTS practice

Virtual Writing Tutor is a free online grammar check and proofreading website that helps writers check spelling, grammar, punctuation, and paraphrasing. It also provides essay scoring, vocabulary checking, and writing tools like essay outliners and narrative creators.
Designed specifically for students and ESL learners, Virtual Writing Tutor offers unique features like automatic essay scoring, IELTS practice tests, and an error correction game that makes learning grammar engaging. The platform also includes a pen pal exchange for language practice and GPT detection to identify AI-generated content.
Virtual Writing Tutor is 100% free to use with some usage limits on the free membership. Unlimited access eventually requires an upgrade.
For pricing details, visit their membership page.
Best for Academic writing with plagiarism and citation checking

Scribbr is an AI-powered academic writing tool that checks grammar, citations, clarity, plagiarism, and AI-generated content in one upload. It combines automated checking with access to expert academic editors and a comprehensive knowledge base of writing resources.
Designed specifically for students and academics, Scribbr offers specialized tools like a citation generator supporting APA, MLA, Harvard, and other styles, a plagiarism checker with high accuracy, and professional proofreading services from expert academic editors. The platform also includes free tools like a paraphrasing tool, AI Humanizer, and a knowledge base with 300+ articles on academic writing.
Scribbr offers free grammar checking and citation generation tools. Plagiarism checking and professional proofreading services are paid features with pricing based on usage.
For more details, visit their grammar checker page.
Best for Content rewriting and paraphrasing for SEO

SpinBot is a free AI-powered text rewriting and paraphrasing tool that automatically rewrites human-readable text into fresh, intelligent alternatives. It helps users enhance their writing, create new content variations, and improve SEO through unique, grammatically accurate content generation.
With one-click operation and support for up to 10,000 characters (approximately 1,000 words), SpinBot makes it easy to generate fresh content variations quickly. The tool offers both Basic and Advanced paraphrase modes, with the Advanced mode providing 70% better quality output for more sophisticated rewriting needs.
SpinBot is completely free to use with basic features. Paid plans start at $3 for 15 days with the Starter Plan, up to $180 for the Pro Plan.
Best for AI-powered rewriting and tone adjustment
Wordtune is an AI-powered writing assistant that helps users express themselves with confidence. It offers paraphrasing, rewriting, grammar correction, and tone adjustment capabilities to improve writing quality and authenticity.
Highly rated with 4.7/5 on Chrome and 97% on the App Store, Wordtune provides contextual AI suggestions that match your writing style. The platform includes unique features like fact-checking with multiple source verification, Smart Synonym generation for vocabulary enhancement, and Smart Translate for native-English sounding translations.
Wordtune offers a free plan to get started. The Advanced plan starts at $6.99/month (or $4.89/month billed annually), and the Unlimited plan is $9.99/month (or $6.99/month billed annually).
For more details, visit their pricing page.
Best for Enterprise teams needing governance and AI agents
Writer is an enterprise AI platform designed for agentic work that enables organizations to build, activate, and supervise AI agents at scale. It helps Global 2000 enterprises automate complex workflows across marketing, finance, HR, legal, and other departments while maintaining governance and security controls.
Writer's platform includes AI Studio for building custom agents, Palmyra LLMs for enterprise-grade AI, and a Knowledge Graph for precise outputs. With enterprise governance, trust & security features, and connectors for integrations, Writer enables organizations to achieve significant time savings, 40-80% reported by customers, and 57% faster time to market for assets.
Writer offers a free trial for the Starter plan. Enterprise pricing is available by contacting sales.
For more details, visit their pricing page.
Best for Fiction writers and novelists seeking manuscript analysis
ProWritingAid is an AI-powered writing assistant that helps writers craft, polish, and elevate their work through in-depth analysis and actionable feedback. It integrates seamlessly with popular writing apps like Word, Google Docs, and Scrivener, offering tools for grammar checking, manuscript analysis, and writing improvement suggestions.
Trusted by over 4 million writers and bestselling authors, ProWritingAid offers unique features for fiction writers including Chapter Critique for single chapter feedback, Manuscript Analysis for full manuscript review, and a Virtual Beta Reader. The platform also includes sensory reports, pacing improvements, and "show, don't tell" suggestions specifically designed for creative writing.
ProWritingAid offers a free plan with basic features. Premium plans start at $12/month (billed yearly) or $30/month (monthly). A Lifetime Access option is available for $399 one-time payment.
For more details, visit their pricing page.
Selecting the ideal grammar checker depends on your specific writing needs, budget, and workflow. Consider these key factors:
Common Misconceptions: A common misconception is that expensive grammar checkers are always better. In reality, free tools like QuillBot, Scribens, and LanguageTool offer excellent accuracy for basic grammar checking. Premium features are only valuable if you specifically need advanced capabilities like tone adjustment, plagiarism detection, or manuscript analysis.
The grammar checking landscape is evolving rapidly with AI advancements and changing user needs. Here are the key trends shaping the industry:
Grammarly is widely considered the most reliable grammar checker, with AI-powered detection that works across 1M+ websites and apps. It catches grammatical errors, spelling mistakes, punctuation issues, and provides tone and clarity suggestions. For academic writing, Scribbr offers specialized reliability with plagiarism detection and citation checking. For multilingual needs, LanguageTool's support for 30+ languages makes it highly reliable for international writers.
The "better" alternative depends on your specific needs. QuillBot offers unlimited free grammar checks without Grammarly's character limits. ProWritingAid is superior for fiction writers with manuscript analysis and Virtual Beta Reader features. LanguageTool excels for multilingual writers with 30+ language support. Scribbr is better for academic writing with plagiarism detection and citation generation. For enterprise teams, Writer provides governance and AI agent capabilities that Grammarly doesn't offer.
Free grammar checkers like QuillBot, Scribens, and LanguageTool offer excellent accuracy for basic grammar, spelling, and punctuation checking, often correcting 90%+ of errors. However, paid versions provide advanced features like tone detection, plagiarism checking, unlimited character limits, advanced style suggestions, and priority support. If you only need basic error correction, free tools are sufficient. For professional writing, content creation, or academic work, premium features often justify the cost.
Some grammar checkers include plagiarism detection, but not all. Scribbr and Grammarly Pro offer comprehensive plagiarism checking that compares your work against billions of sources. Most free grammar checkers like QuillBot, Scribens, and LanguageTool do not include plagiarism detection in their free plans. If plagiarism checking is essential for your work (especially academic writing), choose a tool that specifically offers this feature or use a dedicated plagiarism checker alongside your grammar tool.
Choosing the right grammar checker can significantly improve your writing quality, credibility, and efficiency.
Whether you need unlimited free checks from QuillBot, comprehensive cross-platform support from Grammarly, multilingual capabilities from LanguageTool, or specialized academic features from Scribbr, there's a tool tailored to your specific needs.
Evaluate your primary use case, language requirements, and budget to select the grammar checker that will help you communicate with confidence and clarity.

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