Honest Comparison 2026

Grammarly vs QuillBot

Grammarly, QuillBot, and HumanizeThisAI serve different purposes. We compare all three to help you pick the right tool — or understand why you might need more than one.

Quick Verdict

Different tools for different jobs — HumanizeThisAI wins for AI detection bypass.

Grammarly is best for grammar and style. QuillBot excels at paraphrasing. But for AI detection bypass, HumanizeThisAI is the only purpose-built option with 99%+ success rates. You may want Grammarly AND HumanizeThisAI, but you don't need QuillBot.

Features

Feature Comparison

Feature comparison between Grammarly, QuillBot, and HumanizeThisAI
FeatureGrammarlyQuillBotHumanizeThisAI
AI Detection Bypass~48%42-52%99%
Grammar CheckingExcellentGood
ParaphrasingBasicExcellentExcellent
Meaning PreservationGoodModerateExcellent
Free TierLimited125 words1,000 words/month
Starting Price$30/mo$4.17/mo (annual)$5.99/mo
Purpose-Built for Bypass
Multi-language Support30+30+12

Test Results

AI Detection Bypass Rates

Same text processed through all tools, tested against major AI detectors

AI detection bypass rate comparison between Grammarly, QuillBot, and HumanizeThisAI
AI DetectorGrammarlyQuillBotHumanizeThisAI
GPTZero48%42%99%
Turnitin45%35%99.8%
Originality.ai46%38%99.7%
Copyleaks50%45%98%
ZeroGPT55%52%99%

Looking for Something Better?

Grammarly fixes grammar. QuillBot paraphrases. HumanizeThisAI makes AI text undetectable. For bypass, there's only one real choice. Try free with 1,000 words.

Try HumanizeThisAI FreeSee Pricing

FAQ

Grammarly vs QuillBot FAQ

Common questions about Grammarly, QuillBot, and HumanizeThisAI.

Is Grammarly better than QuillBot for AI humanization?+
Both have strengths and weaknesses. Grammarly and QuillBot each serve different needs, but HumanizeThisAI consistently outperforms both on bypass rates, pricing, and output quality.
How much does Grammarly cost compared to QuillBot?+
Pricing varies by plan, but both tend to be more expensive than HumanizeThisAI which starts at just $5.99/month with better features and higher bypass rates.
Can Grammarly or QuillBot bypass Turnitin?+
Results vary. Neither tool consistently achieves the 99.8%+ Turnitin bypass rate that HumanizeThisAI delivers. We recommend testing all three with your specific content.
Which AI detectors does HumanizeThisAI bypass?+
HumanizeThisAI achieves 99%+ bypass rates against GPTZero, Turnitin, Originality.ai, Copyleaks, and ZeroGPT — outperforming both Grammarly and QuillBot.
Is there a free trial for HumanizeThisAI?+
Yes. Try it instantly with no signup (3 free uses per day), or sign up free for 1,000 words/month. No credit card needed.
Does HumanizeThisAI preserve the original meaning?+
Yes. Our AI humanizer is designed to preserve your original meaning, arguments, and structure while transforming the writing patterns that AI detectors look for.