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5 Results

Grammarly logo

Grammarly

AI writing assistant. Grammar, spelling, tone, and clarity suggestions.

GrammarTone detectionPlagiarismBrowser extension
Free / $12/mo
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ProWritingAid logo

ProWritingAid

Comprehensive writing tool. Deep analysis for authors and professionals.

Style analysisReportsIntegrationsWord explorer
$10/mo
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Hemingway Editor logo

Hemingway Editor

Make writing bold and clear. Highlights complex sentences and passive voice.

ReadabilityFree onlineDesktop appSimple interface
Free online / $19.99
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LanguageTool logo

LanguageTool

Open-source grammar checker. Supports 30+ languages.

30+ languagesOpen sourceBrowser extensionAPI
Free / $4.99/mo
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Ginger logo

Ginger

Grammar and spell checker with translator. Personal trainer feature.

GrammarTranslationPersonal trainerRephrasing
Free / $7.49/mo
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By Misha Catalano, Founder & Lead Software AnalystLast reviewed 9 Aug 2026

What is Grammar Checker Software?

Grammar checker software analyzes written text for grammatical errors, spelling mistakes, punctuation issues, and style improvements. Modern tools go far beyond basic spell-check to include context-aware corrections, tone analysis, readability scoring, plagiarism detection, and AI-powered rewriting suggestions. They work across applications through browser extensions, desktop apps, and API integrations with word processors, email clients, and content management systems. Advanced platforms detect subtle issues like subject-verb agreement, dangling modifiers, passive voice overuse, and inconsistent tense usage. AI-powered writing assistants can adapt suggestions to specific contexts — academic writing, business communication, creative content, or technical documentation — making grammar checking contextually intelligent.

Key Features to Look For

Grammar & Spelling

Detect and correct grammatical errors, misspellings, and punctuation mistakes in real-time.

Style Suggestions

Recommend improvements for clarity, conciseness, and tone appropriate to the writing context.

Tone Detection

Analyze the emotional tone of writing and suggest adjustments for the intended audience.

Readability Scoring

Score text complexity and suggest simplifications for target reading levels.

Plagiarism Detection

Check content against web sources and academic databases for originality verification.

Multi-Platform Integration

Work across browsers, email, word processors, and other writing applications via extensions and plugins.

How Much Does Grammar Checker Cost?

Grammarly Free offers basic grammar checking. Grammarly Premium costs $12/month (annual). Grammarly Business costs $15/user/month. ProWritingAid starts at $10/month. Hemingway Editor is $20 one-time for desktop. LanguageTool is free with Premium at $5/month. QuillBot starts at $10/month. Ginger costs $14/month. Microsoft Editor is free with Microsoft 365. Google Docs grammar check is free.

Frequently Asked Questions

How We Evaluate Grammar Checker

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