QuillBot vs Grammarly AI
A detailed comparison to help you choose between QuillBot and Grammarly AI.
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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.
QuillBot AI paraphrasing and writing tools | Grammarly AI AI writing assistant trusted by millions | |
|---|---|---|
| Rating | 4.0 (1 review) | 4.3 (1 review) |
| Pricing Model | freemium | freemium |
| Starting Price | Free tier available | Free tier available |
| Best For | Students, non-native English speakers and working writers who spend their day rewriting and polishing existing text. | Professionals and students who want one assistant that improves everything they type, everywhere they type it. |
| Free Tier | ||
| API Access | ||
| Team Features | ||
| Open Source | ||
| Tags | free tierbrowser extension | free tierbrowser extensionteam features |
| Visit QuillBot → | Visit Grammarly AI → |
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
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
Frequently Asked Questions
Which is better, QuillBot or Grammarly AI?▼
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 QuillBot and Grammarly AI?▼
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. 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.
Is QuillBot or Grammarly AI more affordable?▼
QuillBot starts at €0/mo, Grammarly AI starts at €0/mo. Check the comparison table above for current pricing.
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