Key takeaways
- Look at per-run limits, meaning, score checks and how you pay, not just the claims.
- Unbot AI is best for full essays you want to check before submitting.
- Humbot and Undetectable AI give big discounts for paying yearly; QuillBot and Grammarly bundle more writing tools.
- Test with your own 300+ word draft and more than one detector.
There are dozens of AI humanizers, and most "best of" lists are written by one of them. So is this one: we make Unbot AI. To keep it fair, every price below comes from each company's own pricing page (US prices, checked in October 2026), we haven't made up any test scores, and each entry says what the tool does well.
Quick picks
- Best for full essays and checking before you submit: Unbot AI
- Best unlimited plan: Humbot
- Best-known name: Undetectable AI
- Best all-in-one writing toolkit: QuillBot
- Best free polish for clarity: Grammarly
What actually matters in a humanizer
Swapping words isn't enough. Detectors look at how predictable the text is: sentence length, rhythm, and word choices a model would make. A good humanizer changes that shape while keeping your meaning. When you compare tools, look at four things:
- How much it takes at once. A 100-word limit means cutting an essay into pieces, and the pieces stop flowing.
- Whether it keeps your meaning. Read the output. A rewrite that changes your argument is worse than none.
- Whether you can check the result. Detectors disagree, so you want to see a score before you use the text.
- How you pay. A subscription makes sense if you write every week; a one-time pack is better for one deadline.
1. Unbot AI
Unbot AI rewrites drafts from ChatGPT, Claude or Gemini so they read like a person wrote them. You watch it rewrite paragraph by paragraph, then click any purple word to swap it, rephrase a single sentence, or check the AI score with one click. It can also run a real Turnitin check and give you the similarity and AI reports as PDFs.
- Free: 300 words when you sign up.
- Price: word pack $4.99 for 5,000 words that never expire. Starter $9.99/month (20,000 words), Pro $19.99/month (60,000), Unlimited $34.99/month; about 40% less billed yearly. Turnitin checks are $2.50 each.
- Limit: up to 3,000 words per rewrite.
- Watch out for: it's focused on humanizing and checking, so there's no grammar checker or citation tool.
2. Humbot
Humbot is a dedicated humanizer with an AI detector that shows several detectors' results at once, and an iOS app.
- Free: 200 words a month, 100 words per request.
- Price: Basic $11.99/month (3,000 words), Pro $22.99/month (30,000 words), Unlimited $59.99/month. Billed yearly, Basic is $7.99/month and Pro $9.99/month. Plans also include a smaller allowance of "advanced" words.
- Limit: 500 words per request on Basic, 1,200 on Pro, no limit on Unlimited.
- Good to know: a 30-day money-back guarantee on paid plans.
Unbot AI vs Humbot, side by side →
3. Undetectable AI
One of the best-known humanizers, with an AI detector and a free trial.
- Price: $9.99/month for 10,000 words, $19/month for 20,000, $31/month for 35,000. Billed yearly, the same plans are $5, $9.50 and $15.75 a month.
- Good to know: paying yearly halves the price, if you'll use it all year.
4. QuillBot
QuillBot's humanizer is one part of a big writing toolkit: paraphraser, grammar checker, summarizer, citation generator and AI detector.
- Free: humanize up to 100 words at a time, with limited use.
- Price: Premium $19.95/month, or $8.33/month billed yearly ($99.95). Prices differ by country.
- Watch out for: the free limit is too short for essays; you'll need Premium for full access.
Unbot AI vs QuillBot, side by side →
5. Grammarly
Grammarly has a free humanizer on its website, alongside its free AI detector. It improves clarity and flow, but Grammarly says plainly that it isn't meant to get text past AI detectors.
- Free: the humanizer and AI detector on Grammarly's site.
- Price: Grammarly Pro $30/month, or $12/month billed yearly.
- Best for: a final grammar and clarity pass on any writing, in any app.
Unbot AI vs Grammarly, side by side →
How to test any humanizer yourself
Don't trust anyone's screenshots, including ours. A five-minute test tells you more:
- Take a real draft of at least 300 words, the length detectors need to be reliable.
- Run it through two or three humanizers using their free words.
- Check each result with more than one AI detector. They often disagree.
- Read every version out loud. Keep the one that still says what you meant and sounds like you.