Grammarly dominates with comprehensive AI capabilities suitable for professionals and students alike. ProWritingAid excels for serious writers and editors who need in-depth analytics. Hemingway Editor offers simplicity and clarity focus for anyone seeking readable, concise prose.
RANKENTRYSCORETRENDFROM
1GrammarlyOver 30 million people use Grammarly, with detection powered by machine learning trained on billions of words95.0NEWFree; £11.66/month Premium 2ProWritingAidProWritingAid provides over 20 different reports on your writing, including readability, pacing and clichés92.7NEW$120 per year 3Hemingway EditorUses colour coding to highlight issues by severity, making it simple for writers to spot problems instantly90.3NEW$19.99 one-time 4Microsoft Word EditorIntegrated into Microsoft 365, allowing seamless grammar checking without leaving Word or Outlook88.0NEW$6.99 per month 5QuillBotQuillbot's paraphrasing engine can rewrite sentences in seven different styles to improve variety and clarity85.7NEWFree; £9.99/month Premium 6LanguageToolSupports over 30 languages and dialects, making it ideal for multilingual writing teams83.3NEWFree (Premium from $4.99 per month) 7GingerGinger analyses text within its grammatical and linguistic context rather than relying solely on rule-based flagging81.0NEW$11.99 per month 8WhiteSmokeOffers writing templates for business communications, resumes and personal correspondence78.7NEW$5.50 per month 9ReversoReverso specialises in grammar and style checking for multiple European languages with context-aware suggestions76.3NEWFree (Premium from €9.99 per month) 10Scribd EditorIntegrated within Scribd's publishing platform, offering grammar checking alongside document sharing and collaboration74.0NEW$11.99 per month The ranking, in detail
01
Writing assistant with integrated summarisation and clarity tools
Grammarly uses advanced AI to check grammar, spelling, tone and plagiarism across web browsers, email, word processors and social media. It offers real-time suggestions with explanations and adapts to your writing style over time.
From Free; £11.66/month PremiumBest for Students, professionals, and businesses standardising writing quality
95.0
02
Professional writing software for authors, editors and content creators
ProWritingAid combines AI-powered grammar checking with comprehensive writing analytics, including readability scoring, style reports and detailed suggestions for improvement. It integrates with Word, Scrivener, Google Docs and web browsers.
From $120 per yearBest for Authors, editors, content marketers and anyone who writes at length
92.7
03
Make your writing bold and clear
Hemingway Editor highlights complex sentences, passive voice, adverbs and readability issues in real time, encouraging clearer and more direct prose. It works as a web app and desktop application with a focus on simplicity and readability.
From $19.99 one-timeBest for Writers prioritising clarity, journalists and anyone seeking concise, direct communication
90.3
04
Built-in AI-powered editing in Microsoft Office
Microsoft Word Editor leverages AI to provide grammar, spelling, style and inclusivity suggestions directly within Word and Outlook. It offers accessibility insights and tone detection as part of Microsoft 365 subscriptions.
From $6.99 per monthBest for Microsoft Office users who want integrated checking without additional software
88.0
05
Paraphrasing engine with document summarisation and plagiarism detection
Quillbot combines grammar checking with paraphrasing, plagiarism detection and citation tools. It emphasises helping users improve phrasing and writing variety whilst maintaining correctness, with integrations for major browsers and writing platforms.
From Free; £9.99/month PremiumBest for Students, academics, and writers needing paraphrasing alongside summary tools
85.7
06
Open-source online grammar and spell checker
LanguageTool is an open-source tool supporting 30+ languages with rules-based and AI-powered checking. It works as a browser extension, web app, desktop application and within various document editors, with a free version available.
From Free (Premium from $4.99 per month)Best for Multilingual writers and those seeking an open-source, privacy-focused solution
83.3
07
Perfect your writing with AI-powered corrections
Ginger uses contextual grammar checking, spell checking and sentence rephrasing powered by machine learning. It offers browser extensions, mobile apps and a web-based editor, with an emphasis on correcting errors in context rather than flagging rule violations.
From $11.99 per monthBest for Non-native English speakers and writers seeking contextual error correction
81.0
08
Comprehensive online writing and grammar checking
WhiteSmoke provides multilingual grammar, spelling and style checking with desktop, web and mobile apps. It includes templates for business and personal writing, plagiarism detection and voice input capabilities.
From $5.50 per monthBest for Business writers and those needing multilingual support with additional writing templates
78.7
09
Translation and writing correction for multiple languages
Reverso combines translation, grammar checking and spell checking across 15+ languages. It offers context-aware correction and works as a browser extension and standalone tool, with strong support for European languages.
From Free (Premium from €9.99 per month)Best for Multilingual users and those translating between languages regularly
76.3
10
Writing assistance powered by AI for document quality
Scribd Editor integrates grammar and spelling checking within the Scribd publishing platform alongside document collaboration features. It provides real-time suggestions as you write and supports both personal and professional documents.
From $11.99 per monthBest for Scribd platform users and those publishing or collaborating on documents within that ecosystem
74.0
Frequently asked questions
What is the difference between AI-powered and rule-based grammar checkers?
Rule-based checkers use predefined language rules to flag errors, whilst AI-powered tools use machine learning trained on vast datasets to understand context and catch nuanced mistakes. AI tools generally achieve higher accuracy, especially for complex sentences and contextual errors that rule-based systems miss.
Do these tools work offline or do they require an internet connection?
Most tools offer both online and offline functionality. Grammarly, ProWritingAid and LanguageTool have desktop applications that work offline, though cloud sync features require internet. Some lighter tools like Hemingway Editor work fully offline in their desktop versions.
Are these grammar checkers suitable for non-native English speakers?
Yes, many are particularly effective for non-native speakers. Ginger specialises in contextual correction for ESL learners. LanguageTool and Reverso excel for multilingual users. Grammarly and Quillbot also provide strong support with clear explanations of rules and suggestions.