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Clever AI Humanizer vs QuillBot

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors.

The short answer

Free plan
Both — Clever AI Humanizer is free to use, QuillBot has a free plan
Higher Trust score
QuillBot — 93 vs 78 for Clever AI Humanizer
Best fit
Clever AI Humanizer: Loosening up long machine drafts before you edit them yourself · QuillBot: Students and non-native writers rewording essays and emails sentence by sentence
Platforms
Clever AI Humanizer: Web · QuillBot: Web, Chrome extension, Windows, macOS, iOS, Android
Status
Both up at our last check (Sep 6, 2026)

From our own records as of each tool's last check. Anything we have not confirmed is left out rather than guessed. How we verify

Clever AI HumanizerFree rewriter for AI-generated text, up to 3,000 words a pass, in English and Spanish.QuillBotParaphrasing, summarising and citation tools for students

Side by side

FactClever AI HumanizerQuillBot
CategoryAI Detection & HumanizersParaphrasing & Rewriting
Pricing modelFreeFreemium
Starts at—$19.99/mo
Trust score78 / 10093 / 100
PlatformsWebWeb, Chrome extension, Windows, macOS, iOS, Android
CompanyCleverFiles Inc.Learneo, Inc.
Last verifiedSep 6, 2026Sep 6, 2026

What our research says

Clever AI Humanizer

A free humanizer with an actual named US company behind it, which puts it a step above the anonymous crowd in this category. The 3,000-word window and change highlighting make it practical for editing rather than blind pasting. Two languages only, and being free with no visible revenue means no promises about uptime or longevity.

Pros

  • Up to 3,000 words per request, larger than most free tiers allow
  • Highlights the changes it made instead of returning an opaque block
  • Three rewrite styles: Normal, Clear & Structured, Simple Formal
  • Named operator — CleverFiles Inc., New Castle, Delaware — with file upload and run history

Cons

  • English and Spanish only
  • No API, no browser extension, no mobile app
  • Free with no stated business model, so continuity is uncertain
  • Rewriting to defeat detectors remains a policy problem wherever detectors are used

QuillBot

QuillBot remains the fastest way to reword a paragraph you have already written, and the free tier is enough for occasional use; Premium at roughly $8 to $20 a month depending on term buys the extra modes, longer inputs and the plagiarism checker that students actually want. Against a general chatbot it wins on speed and a purpose-built interface, not on writing quality, and against Grammarly it is cheaper but narrower.

Pros

  • Free tier includes grammar checking, two paraphrase modes, translation and AI detection
  • Extensions and apps for Chrome, Windows, macOS, Safari, iOS and Android keep it inside the writing surface
  • Paraphrase modes and a synonym slider give more control than a one-shot rewrite prompt
  • Backed by Learneo, a large education group, rather than an anonymous operator

Cons

  • Month-to-month Premium is about 2.4 times the annual rate, so the headline low price assumes a year up front
  • The site blocks automated access, so none of the figures here come from its own pricing page
  • The App Store listing itself disagrees on how many Premium paraphrase modes exist (8 versus 10+)
  • The heavy student use and the AI detector attract academic-integrity scrutiny that can rebound on users

Which one fits

Choose Clever AI Humanizer if you need

  • Loosening up long machine drafts before you edit them yourself
  • Spanish-language as well as English rewriting
  • Seeing exactly which phrases were changed rather than getting an opaque rewrite

Choose QuillBot if you need

  • Students and non-native writers rewording essays and emails sentence by sentence
  • Anyone who wants grammar, paraphrase, summary and citation tools in one browser extension
  • Occasional users, since the free tier handles short rewrites without an account upsell wall

Clever AI Humanizer vs QuillBot: the questions people ask

Is Clever AI Humanizer cheaper than QuillBot?

Clever AI Humanizer is free to use; QuillBot starts at $19.99/mo.

Does Clever AI Humanizer or QuillBot have a free tier?

Both: Clever AI Humanizer is free to use, and QuillBot has a free tier.

More comparisons

All Clever AI Humanizer alternatives →All QuillBot alternatives →Browse all AI Detection & Humanizers →