Grammarly AI vs QuillBot
A detailed comparison to help you choose between Grammarly AI and QuillBot.
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Verdict: Grammarly AI wins
Grammarly AI scores 4.3/5, edging out QuillBot at 4.0/5. Professionals and students who want one assistant that improves everything they type, everywhere they type it.
Grammarly AI AI writing assistant trusted by millions | QuillBot AI paraphrasing and writing tools | |
|---|---|---|
| Rating | 4.3 (1 review) | 4.0 (1 review) |
| Pricing Model | freemium | freemium |
| Starting Price | Free tier available | Free tier available |
| Best For | Professionals and students who want one assistant that improves everything they type, everywhere they type it. | Students, non-native English speakers and working writers who spend their day rewriting and polishing existing text. |
| Free Tier | ||
| API Access | ||
| Team Features | ||
| Open Source | ||
| Tags | free tierbrowser extensionteam features | free tierbrowser extension |
| Visit Grammarly AI → | Visit QuillBot → |
Grammarly AI
Pros
- + The correction engine caught every mechanical error in my corrupted test sample, and Pro's sentence rewrites fixed wordy-but-not-wrong prose
- + Works in webmail, document editors and support forms with zero setup — corrections follow you across every text field
- + Tone detector gave a useful second opinion before sending sensitive messages in my testing
- + Team layer (style guide, brand tones, analytics) is mature enough for real organisational enforcement
- + Enterprise governance is real: SAML SSO, SCIM, DLP, BYOK, audit-log API, and a published SOC 2 (Type 2) attestation
Cons
- - Long-form generation is filler-level without heavy steering; there is no manuscript or article drafting workflow
- - Free tier's 100 AI prompts/month runs out fast if rewrites are part of every message; full-sentence rewrites are Pro-only
- - Per-member pricing scales steeply — ten seats at $12/member/month annually is $1,440/year before Enterprise
- - AI-text and plagiarism detectors are probabilistic signals, not verdicts; risky as academic evidence
- - Everything typed through the extension is processed by a third party, and the Superhuman-era corporate changes may reshape the product
QuillBot
Pros
- + Paraphrase quality held meaning while varying syntax across my academic and marketing samples — better at this than any general chat assistant I tested
- + The synonym-density slider gave real control: minimal for safe close rewrites, maximum for novelty
- + Premium at $8.33/month billed annually ($99.95/year per QuillBot's FAQ) brings nine modes, 23-language paraphrasing and a 25,000-word/month plagiarism checker
- + Citation Generator (MLA/APA/Chicago) plus the Summarizer make it a genuine student workflow, not just a rewriter
- + Free tier is honest about its caps and the browser extension covers the everyday check-and-fix loop
Cons
- - Free caps (100 words per paraphrase, two modes) make serious use a Premium purchase
- - Technical and domain phrasing occasionally came back wrong-but-pretty in my tests — output needs reading, not trusting
- - Not a long-form generator: the AI Writer/Chat are accessories and the Summarizer caps at 6,000 words on Premium
- - The AI Detector/Humanizer pairing is both a proofreading convenience and the toolkit for disguising generated work — poor evidence for integrity decisions
- - Monthly billing at $19.95 (third-party-confirmed) is more than double the annual rate; the real price is a yearly commitment
Frequently Asked Questions
Which is better, Grammarly AI or QuillBot?▼
Grammarly AI scores higher at 4.3/5 vs 4.0/5 for QuillBot, making it the better-rated option in our comparison.
What is the difference between Grammarly AI and QuillBot?▼
Grammarly AI: Writing assistant that checks grammar, spelling and tone in your browser, email and docs, with AI rewrites. Free plan; Pro adds full-sentence rewrites and plagiarism checks. QuillBot: QuillBot is an AI writing assistant best known for paraphrasing, alongside grammar checking, summarising and citation tools. It is widely used by students and writers.
Is Grammarly AI or QuillBot more affordable?▼
Grammarly AI starts at €0/mo, QuillBot starts at €0/mo. Check the comparison table above for current pricing.
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