QuillBot

QuillBot is a suite of AI writing tools, best known for its paraphraser, which rewrites a sentence or paragraph while keeping its meaning. Used by more than 35 million people according to the company, it belongs to the US group Learneo, which also owns Course Hero.

What can you do with QuillBot?

• Paraphraser: nine built-in modes (from Standard and Fluency to Academic or Simple) plus custom modes, in 23 languages.
• Grammar checker: grammar, punctuation and tone, in six languages.
• AI detector and AI humanizer: spot AI-generated text, or make text sound more natural.
• Plagiarism checker, summarizer, translator (40+ languages) and citation generator.
• AI chat and image generation.

QuillBot works on the web and through extensions and apps for Chrome, Edge, Safari, Word, Windows, macOS, iPhone and Android.

QuillBot pricing in 2026

• Free: paraphrasing up to 100 words in two modes, basic grammar fixes, humanizer limited to 100 words, summaries up to 1,200 words and a limited AI detector.
• Premium: €8.33 per month billed annually. Unlimited paraphrasing in every mode, plagiarism checks up to 25,000 words per month, full AI detector and humanizer, summaries up to 6,000 words.
• Team: for organisations, with user management and centralised billing.

QuillBot offers a 14-day money-back guarantee.

Our verdict on QuillBot

Pros: a fast, effective paraphraser, a complete suite at a moderate price and a free plan that helps in a pinch.

Cons: the 100-word free limit is reached quickly, and automatic rewording is no substitute for real rewriting. For academic work, use it to improve your own text rather than to disguise borrowed content.

QuillBot alternatives

• Grammarly: the go-to grammar checker for English.
• Wordtune: a sentence rewriter with a very natural style.
• LanguageTool: a strong multilingual grammar checker.
• DeepL: high-quality translation with a rewriting tool.
• Compilatio Magister+: plagiarism and AI detection used by many schools.

Frequently asked questions

Is QuillBot free?

Yes, with limits: 100 words per paraphrase, two modes and restricted features. Premium removes them for €8.33 per month billed annually.

Which languages does QuillBot support?

The paraphraser works in 23 languages and the translator in more than 40.

Can QuillBot-paraphrased text be detected?

It can be: simple rewording does not guarantee that text will pass AI detectors. QuillBot offers its own detector to check a text before submitting it.

Key features

• Paraphraser: 9 built-in modes plus custom modes, in 23 languages.
• Grammar checker in six languages, with tone insights.
• AI detector and AI humanizer.
• Plagiarism checker: 25,000 words per month on Premium.
• Summarizer up to 6,000 words on Premium.
• Translator in 40+ languages and citation generator.
• Extensions and apps: Chrome, Edge, Safari, Word, Windows, macOS, iOS, Android.