Best QuillBot Alternatives With an AI Detector (2026)

If you want a paraphraser and an AI detector in the same place, the three QuillBot alternatives worth a look are Grammarly (best if you already write in its editor), Quetext (best if you also need a plagiarism checker) and Unflag (best if you want rewriting, a humanizer, an AI check and a fact checker in one app at a lower yearly price). QuillBot itself still has one of the more generous free AI detectors, so it's worth knowing what you'd give up before you switch.

How they compare

Prices are US list prices from each vendor's own pages, as of October 2026.

Why look for a QuillBot alternative at all?

Most people who search for this already like paraphrasing in QuillBot and run into one of three things: the free paraphraser stops at 125 words and two modes, Premium costs $19.95 if you pay monthly, or they want more than a paraphraser and a detector, such as a humanizer that keeps the facts or a way to check claims in an AI draft. If none of those bother you, staying on QuillBot is a perfectly good answer. Its free detector is generous, and its "AI-refined" category is useful for drafts you wrote yourself and polished with AI.

Is Grammarly a good QuillBot alternative?

Yes, if you want everything inside the editor you already use. Grammarly's free plan includes a paraphrasing tool with preset styles, a basic AI humanizer and a free AI detector that gives an overall percentage (Grammarly AI detector). Pro, at $12 a month, adds full-sentence rewrites, plagiarism checking and a detector view that points to the parts that may sound AI-written.

The trade-off is that Grammarly is built around grammar and style suggestions first. If your main job is rewriting whole paragraphs in different tones or formats, its paraphraser is a smaller part of the product than QuillBot's.

Is Quetext a good QuillBot alternative?

Yes, if plagiarism checking matters as much as AI detection. Quetext's free plan checks up to 1,000 words for plagiarism and AI, and includes a humanizer for up to 2,000 words. Its paraphraser, though, only comes with the paid plans, starting with Essential at $14.99 a month for 100,000 words. So it replaces QuillBot's detector and plagiarism checker well, but it isn't a free paraphraser.

Where Unflag fits

Unflag is the pick if you want the rewrite, the AI check and the fact check in one workspace, on the web and on your phone. It has five tools side by side: Humanize AI, Rewrite, AI Detector, Fact Check and History.

• Rewrite covers what you'd use QuillBot's paraphraser for: Rephrase, Improve Writing, Fix Grammar, Make Shorter, Make Longer, Simplify and TL;DR, plus formats for LinkedIn, Email, X, Instagram, TikTok, Facebook and Dating Apps. It keeps the language you wrote in.
• Humanize AI rewrites an AI draft from ChatGPT, Claude or Gemini so it reads naturally, with 18 tones from Formal to Casual. Before rewriting, it notes the prices, percentages and other figures in your text and puts back any the rewrite dropped. Still read your numbers before you send anything.
• AI Detector gives an overall AI score, an AI vs human split and a verdict, so you can check how your own draft reads before you send it.
• Fact Check (Plus) pulls the claims out of a text, searches the web for each one and shows a verdict with sources, which is handy for AI drafts that may contain made-up facts.

A typical workflow: paste a ChatGPT draft into Humanize AI, pick the Professional tone, check the result in AI Detector, then run Fact Check on anything with numbers or claims. Everything you run is saved in History, so you can come back to an earlier version.

On price, Unflag Plus is $8.99 a month or $45.99 a year on the web, as of October 2026, which is less than half of QuillBot's yearly price. The free plan lets you try every tool except Fact Check on up to 600 characters per input, a limited number of times each day, after you sign in. The iPhone and Android apps sell a weekly plan at $6.99 and a yearly plan billed at the price shown in the app.

What Unflag doesn't do

Unflag has no plagiarism checker, no citation generator and no browser extension, so it won't replace QuillBot or Quetext for checking sources. Its free limit of 600 characters per input, roughly 100 words, is a little below QuillBot's 125 free words. And its AI Detector shows an overall score, not sentence-by-sentence highlights.

Can you trust any of these AI detectors?

Use them to check your own writing, not to judge someone else's. Independent research has found that detectors can be thrown off by the model, the decoding settings and light edits (RAID benchmark, 2024), and that they flag non-native English writing as AI far more often than native writing (Liang et al., 2023). That's why two tools in the table above can give the same paragraph very different scores. Unflag can't guarantee that any rewritten text will pass another company's detector, and neither can anyone else. If your school or employer has rules on AI use, follow them.

How we compared

We compared QuillBot, Grammarly, Quetext and Unflag using each vendor's published pricing pages, product pages and help articles in October 2026, plus Unflag's own product. We didn't run detection benchmarks, so the table describes what each tool offers, not how accurate it is. Prices change often, so check the vendor's page before you buy.

Bottom line: keep QuillBot if its free tier covers you, choose Quetext if you need plagiarism checks, and choose Grammarly if you live in its editor. Choose Unflag if you want rewriting, humanizing, an AI self-check and fact checking together, with phone apps and a cheaper yearly plan.

Frequently asked questions

Is there a free QuillBot alternative with an AI detector?

Yes. Grammarly offers a free AI detector and a free paraphrasing tool, Quetext's free plan checks up to 1,000 words for AI, and Unflag's free plan lets you rewrite and run its AI Detector on up to 600 characters per input after you sign in. QuillBot itself also has a free detector, up to 1,200 words per scan.

Which is cheaper, QuillBot Premium or Unflag Plus?

As of October 2026, QuillBot Premium costs $19.95 a month or $99.95 a year, according to QuillBot. Unflag Plus costs $8.99 a month or $45.99 a year on the web. Unflag's iPhone and Android apps sell weekly and yearly plans instead, at the price shown in the app.

Can an AI detector prove that someone used AI?

No. Detectors estimate how much a text resembles AI writing, and independent research has found they disagree with each other and can flag human writing, especially from non-native English speakers. Treat any score, including Unflag's, as one signal to check your own draft, never as proof about someone else's work.

Does Unflag have a plagiarism checker like Quetext or Grammarly?

No. Unflag has a humanizer, a rewriter with 14 options, an AI Detector and a fact checker, but no plagiarism checker. If you need to check text against published sources for copied passages, Quetext or Grammarly Pro is the better pick.

Will text rewritten in Unflag pass other AI detectors?

Unflag can't guarantee that. Its AI Detector shows how your draft reads to Unflag's own model, which doesn't predict what GPTZero, Turnitin or any other detector will say. Use the rewrite to make the text read naturally, and follow the AI rules of your school or workplace.