QuillBot review

QuillBot bundles a handful of writing tools under one account: a paraphraser, a grammar checker, an AI detector, a humanizer, an AI chat assistant, and a set of PDF tools for editing, merging, splitting, and converting files. The pricing page says it works across browsers, documents, and apps, so the idea is one workspace instead of five separate extensions.

QuillBot's homepage cites 35+ million users and a 4.7/5 rating on its Chrome extension, which signals the paraphraser and grammar checker are the tools most people actually came for. The AI detector and humanizer are newer additions aimed at students and content writers worried about being flagged, and they sit alongside the writing tools rather than as a separate product.

QuillBot's core strength is still what it started as: a fast paraphraser and grammar checker, not a from-scratch content generator. For editing existing drafts, that's a narrower and more useful job than most AI suites try to do.

• A genuine free plan exists, not just a trial, covering basic grammar fixes and 125-word paraphrases in Standard and Fluency mode.
• Premium unlocks unlimited paraphrasing across 9 predefined modes plus a Custom mode, per the pricing page.
• Premium also includes a Freeze Words and Synonym Slider feature for controlling which terms get rewritten, useful for technical or branded copy.
• Pricing is transparent and tiered by commitment: $19.95/month billed monthly, $13.31/month quarterly, or $8.33/month billed annually.
• Team plans scale per seat ($7.50 down to $5.83 depending on headcount), with centralized billing for agencies managing multiple writers.

For someone who mainly needs grammar cleanup and light rewriting, that combination of a real free tier and a cheap annual plan is competitive next to single-purpose grammar tools.

The free plan is thin: 125 words per paraphrase, only two modes, 1,200 words in the Summarizer and AI Detector, and no access to the Plagiarism Checker at all. Anyone doing real editing work will hit those caps fast.

The Plagiarism Checker isn't even included unlimited on Premium — it's capped at 25,000 words/month, and going over means buying word packs starting at $2.45 for 6,250 words, scaling to $19.95 for 62,500 words.

The bigger issue is the humanizer's reliability against AI detectors. In one Reddit thread, a student reported an 85% AI score on Turnitin after three semesters of relying on QuillBot Premium to paraphrase essays. Another thread included a commenter saying QuillBot's humanizer either produces incomprehensible rewrites or still gets flagged by multiple detectors. If avoiding an AI-detection flag is the whole reason to buy Premium, Reddit users don't describe it as dependable.

QuillBot’s Free plan costs $0, but it caps paraphrasing at 125 words per request and limits users to Standard and Fluency modes. The Summarizer and AI Detector each have a 1,200-word limit, and the plan does not include Plagiarism Checker access.

Premium is the big step up: $19.95 month to month, $13.31 per month billed quarterly, or $8.33 per month billed annually. It adds unlimited paraphrasing, nine predefined modes plus Custom mode, and 25,000 plagiarism-checker words per month. That’s a meaningful jump from free, especially if you mainly need basic grammar help.

Team requires at least two seats and an annual commitment. The listed rate is $7.50 per seat monthly for 2–10 seats, falling to $6.66 for 11–50 and $5.83 for 51 or more. Extra plagiarism words cost $2.45 for 6,250, $8.95 for 25,000, or $19.95 for 62,500. Team has no monthly billing option in the published pricing details.

Switching to QuillBot looks simplest if you need its paraphraser, grammar checker, or PDF tools as separate writing utilities; replacing a broader writing workflow may take more work. The published product details don’t explain how to import existing documents, export work, or move account data, so check those points before making it a team-wide tool. Data portability is not published in the material we reviewed.

Leaving may mean finding replacements for whichever features your team actually uses, from paraphrasing to plagiarism checks. That’s a workflow consideration, not a documented migration barrier: we don’t have evidence here of a proprietary file format or an export restriction. The published material also contains no Reddit posts or comments, so we can’t reliably say what users on Reddit report as reasons for leaving. Before switching, confirm export options and whether your replacement covers any paid features you depend on, particularly plagiarism checking.