QuillBot

QuillBot is worth it if you regularly write in English as a second language —academic papers, research, work emails— and need to paraphrase, fix grammar or polish your style fast, without opening a generic AI chat and writing a prompt every time. It started out as a fairly simple paraphrasing tool, but today it’s a fairly complete writing suite: it paraphrases with several modes (fluency, formal, creative, academic, among others), corrects grammar and style, flags content that’s likely AI-generated or plagiarized, generates citations in several academic formats, and summarizes long documents.

What sets it apart from a chat assistant like ChatGPT or Claude isn’t the power of the underlying model, it’s the friction it removes: instead of copying a text, pasting it into a chat window and writing a prompt each time, QuillBot’s browser extension corrects and suggests directly inside Gmail, Google Docs, LinkedIn or almost any text box, while you type. For someone who writes in English every day, that integration saves more real time than access to a bigger language model would.

In practice

This shows up in very concrete uses: a student rewriting a paragraph of their thesis with the academic mode so it doesn’t read too close to the original source, a researcher generating citations for a paper in APA or MLA format without memorizing the exact style, or someone pasting a suspicious piece of text before submitting it to check how likely a detector is to flag it. It’s also useful for summarizing a long paper before deciding whether it’s worth reading in full, or for checking the grammar on an important email without leaving the browser tab.

Plans and pricing (2026)

• Free — basic paraphrasing and grammar correction, with a low word limit per use and reduced access to the rewriting modes.
• Premium (USD 19.95/mo) — every paraphrasing mode, the advanced grammar checker, the AI and plagiarism detectors, the citation generator and summarizer, with none of the free plan’s word limits.
• Premium annual (USD 8.33/mo, billed as USD 99.95 once a year) — the same Premium plan at a steep discount for paying the full year upfront; there’s also a semiannual option at USD 13.31/mo.
• Team (from USD 7.50 per user/mo, 2 to 10 seats) — the same Premium features with centralized billing and admin for multiple people.
• Verified students (USD 6.25/mo) — full Premium access at one of the steepest profile-based discounts in the category.

For this review we tested paraphrasing across several of its modes, the grammar checker and the AI detector on academic texts in English, plus the browser extension running inside Gmail and Google Docs, which is where the difference against pasting text into a generic chat shows up most.

What to know before choosing

The most real limitation is still language: QuillBot is built almost exclusively for English text, and paraphrasing in Spanish or Portuguese is noticeably weaker than in its main language. The free plan also has a fairly low per-use word limit, so for longer work you’ll end up needing the paid plan sooner or later — and while the annual discount is steep, the no-commitment monthly price (USD 19.95) is pricier than several generic text generators.

Worth it if you write in English regularly and value having correction built right into where you already write, instead of pasting text into another window every time you need to check it. If your content is mostly in Spanish or Portuguese, or you already use a full chat assistant to rewrite and correct text, you probably don’t need another subscription just for this.