ProofWrite 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

Cheaper paid plan: ProofWrite — $9.99/mo vs $19.99/mo for QuillBot
Free plan: Both have one
Higher Trust score: QuillBot — 93 vs 52 for ProofWrite
Best fit: ProofWrite: students and academics needing text that reads naturally · QuillBot: Students and non-native writers rewording essays and emails sentence by sentence
Platforms: ProofWrite: Web · QuillBot: Web, Chrome extension, Windows, macOS, iOS, Android

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

ProofWriteRewrites AI-generated text to read more naturally and pass detectors like Turnitin, GPTZero, and Originality.ai.

QuillBotParaphrasing, summarising and citation tools for students

Side by side

Fact	ProofWrite	QuillBot
Category	AI Detection & Humanizers	Paraphrasing & Rewriting
Pricing model	Freemium	Freemium
Starts at	$9.99/mo	$19.99/mo
Trust score	52 / 100	93 / 100
Platforms	Web	Web, Chrome extension, Windows, macOS, iOS, Android
Company	—	Learneo, Inc.
Last verified	Sep 1, 2026	Sep 6, 2026

What our research says

ProofWrite

ProofWrite is built around one specific job: getting AI-written text past detection tools while keeping the meaning intact, verified against a stated list of detectors rather than a vague claim. The catch is that detector behavior changes over time, so passing today's check doesn't guarantee it holds up against a future detector update, and 250 free words isn't much to evaluate quality on your own text.

Pros

checks output against seven named detectors rather than just one
eight writing modes for different tones, including academic, formal, and blog
free tier and no-card signup to test before paying

Cons

detector-passing behavior can change whenever those detectors update their models
only 250 free words to evaluate before hitting a paywall
unlimited-word tier requires the top Ultra plan

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 ProofWrite if you need

students and academics needing text that reads naturally
SEO writers and content teams producing high volumes of AI-assisted copy
anyone needing output checked against multiple named detectors at once

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