QuillBot
QuillBot is an AI writing tool that rewords text in modes such as fluency, formal and creative, checks grammar and spelling, and summarizes long text. It also has an AI detector, a phone keyboard app and a browser extension.
#9 in Writing & Translation ToolsParaphrasing ToolsGrammar CheckersFree plan
Who it's for
Best for
Students fixing grammar and rewording their own sentences
Writers who want a quick synonym or rephrase while typing on a phone
Not for
Anyone relying on its AI detector score
Buyers who want to pay month to month without surprises
Free plan$0
Premium$8.33/moBilled annually
TeamCustom
Features
Paraphraser
Rewords sentences and paragraphs in several modes, such as fluency, formal, simple and creative.
Grammar checker
Finds and fixes spelling, grammar and punctuation mistakes across a whole document at once.
Summarizer
Condenses long articles or papers into key sentences or a short paragraph of adjustable length.
AI detector
Scores text for likely AI writing and marks human-written and AI-refined passages separately.
Keyboard and extension
A phone keyboard and a Chrome extension bring grammar fixes and rewording into other apps.
What users say
Pros
- Fixes spelling and grammar mistakes across entire drafts in a single click.
- One-click paraphrasing is faster than writing prompts for a chatbot to polish text.
- Keyboard integration feels unobtrusive for fixing text across apps.
- One-click rewriting avoids prompt crafting, making it simpler than general AI tools.
- Monthly cost is lower than general AI tools, around $8.3 versus $20.
- Fine-grained synonym choices help tailor academic phrasing.
Cons
- The app glitches or freezes and can lose all typed text.
- A whole year is charged up front or on renewal, and refunds are refused.
- Recent updates removed the sentence picker and added limits to free modes.
- The AI detector gives scores that swing wildly and disagree with other detectors.
- Free paraphrasing is capped at 100 words per attempt with limited daily uses.
A selection of the review sources we used:
Summarized from public user reviews and community discussions. View details
Global Traffic Rank
Top 5k
Alternatives
Rank#9 in category#10 in category#20 in category#5 in category
Free planYesYesYesYes
ProEasy grammar fixes and flexible paraphrasing modesSelf-hostable checker that catches slips in many languagesMultiple rewrite options, voice kept, clearer academic writingCatches small slips, safety net for English phrasing
Better forChecking grammar across more than thirty languages and offering local self-hosting for document privacy.Detecting tone and trimming wordiness directly inside desktop and web apps
Weaker atSummarizing long articles or papers into condensed key sentences or paragraphs.Paraphrasing text across multiple rewrite modes and adjusting synonym levels