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Compare the best AI tools

Select a category, then compare up to 3 tools side by side. Analyze features, pricing, and performance.

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Writing & SEO21 tools available
Grammarly
Grammarly

AI writing assistant for flawless writing

Grammarly is the world's #1 AI writing assistant. Grammar correction, style suggestions, plagiarism detection, and GrammarlyGO generative AI. Used by 40M+ people.

Strengths

  • Accurate real-time grammar correction
  • GrammarlyGO for AI content generation
  • Extensions for all browsers
  • Tone detection and style suggestions

Limitations

  • Only available in English
  • Advanced features are paid
  • Plagiarism detector limited to Premium
  • Can be intrusive for some users

Pricing plans

  • Basic grammar and spelling
  • Tone detection
  • Basic punctuation
  • Limited suggestions
  • All Free features
  • Full sentence rewrites
  • Word choice improvements
  • Tone adjustments
  • Plagiarism detector
  • Fluency suggestions
  • Formatting recommendations
  • GrammarlyGO AI writing
  • All Premium features
  • Custom Brand Voice
  • Team style guides
  • Admin dashboard
  • Writing analytics
  • Priority support
  • SSO & SCIM provisioning
  • Account roles and permissions
  • All Business features
  • Dedicated account manager
  • Custom contracts
  • Advanced security controls
  • SAML SSO
  • Custom analytics & reporting
  • Professional services
QuillBot
QuillBot

AI-powered paraphrasing and writing tool

QuillBot is an AI writing assistant offering paraphrasing, grammar checking, plagiarism detection and automatic summarization.

Strengths

  • Powerful paraphraser with 10+ modes
  • Generous free plan to get started
  • Popular Chrome extension (4.5M+ users)
  • Reliable plagiarism detection

Limitations

  • Limited features in free version
  • No built-in SEO tools
  • Plagiarism check limited to 25,000 words/month on Premium
  • Less suited for long-form writing

Pricing plans

  • Paraphrase jusqu'à 125 mots
  • Vérification grammaticale basique
  • 1 scan plagiat
  • Extension Chrome
  • Paraphrase illimitée
  • 10+ modes de réécriture
  • Vérificateur grammatical avancé
  • 25 000 mots/mois plagiat
  • Résumeur jusqu'à 6 000 mots
  • Traducteur 50+ langues
  • Détecteur IA
  • Générateur de citations
  • Humaniseur de texte
  • Toutes les fonctionnalités Premium
  • Tarif réduit étudiant vérifié
  • Toutes les fonctionnalités Premium
  • Contrôles centralisés
  • Guides de style partagés
  • Collaboration d'équipe

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General overview

Criterion
Grammarly
QuillBot
AI typeAI NativeAI Enhanced
Country of origin🇺🇸 United States🇺🇸 United States
Year founded20092017
Supported languages6 languages23 languages
Free plan
Yes
Yes
API available

Detailed comparison

FeatureGrammarlyQuillBot
Brand Voice
Unlimited words
Marketing templates
Campaign orchestration
Knowledge base
AI Writing
SEO Optimization
Plagiarism detection
Tone adjustment
Multilingual Writing
Content templates
Keyword research
SERP analysis
Word Limit
Browser Extension
Available
Not available
Best

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