GPTinf 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 have one
Higher Trust score: QuillBot — 93 vs 70 for GPTinf
Best fit: GPTinf: marketers loosening obviously templated AI copy before a human edit pass · QuillBot: Students and non-native writers rewording essays and emails sentence by sentence
Platforms: GPTinf: 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

GPTinfRewrites AI-generated text to read as human-written

QuillBotParaphrasing, summarising and citation tools for students

Side by side

Fact	GPTinf	QuillBot
Category	AI Detection & Humanizers	Paraphrasing & Rewriting
Pricing model	Freemium	Freemium
Starts at	—	$19.99/mo
Trust score	70 / 100	93 / 100
Platforms	Web	Web, Chrome extension, Windows, macOS, iOS, Android
Company	—	Learneo, Inc.
Last verified	Sep 6, 2026	Sep 6, 2026

What our research says

GPTinf

This is a detector-evasion rewriter and you should judge it as exactly that. If you are a student, running coursework through it is an academic-integrity violation whether or not the detector catches you.

Pros

word locking preserves citations, proper nouns and product names through the rewrite
a usable trial runs without an account, so you can judge output before paying
priced by word volume rather than per seat, which suits occasional use
one screen, no setup, no onboarding

Cons

independent reviews rate output as inconsistent, particularly across longer paragraphs
detector evasion is an arms race, so what passes this month can fail next month
no company name, team or jurisdiction disclosed anywhere on the site
no API, so it cannot be wired into a content pipeline

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 GPTinf if you need

marketers loosening obviously templated AI copy before a human edit pass
stress-testing how brittle your own organisation's AI-detection policy is
writers who want a paraphrase pass with specific terms locked in place

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