Pick QuillBot if…
you're a student or ESL writer who rephrases sources daily and needs plagiarism checks alongside.
ChatGPT can paraphrase and summarise, so many students wonder whether QuillBot is still worth paying for. QuillBot is a dedicated rewrite suite: 9+ paraphrasing modes, a summarizer, an AI humanizer, an AI detector and a plagiarism checker in one tab. ChatGPT is a general assistant with unlimited text chat even on the free plan, but those checking tools aren't part of it.
Pick QuillBot (Premium at $19.95/mo, much less billed annually) if you need structured paraphrase modes and a plagiarism checker. Pick ChatGPT (free, or Go at $8/mo) if flexible rewrites and summaries on request are enough and you want help with other tasks too.
| App | Free tier | Paid from | Top plan | Best for |
|---|---|---|---|---|
| QuillBot | Yes | $19.95/mo | $19.95/mo | Students and ESL writers polishing and paraphrasing existing text rather than generating new content |
| ChatGPT | Yes | $8/mo | $500/mo | Everyday writing, brainstorming, image generation, casual coding |
Monthly prices in US dollars before tax, from each vendor's official pricing (US list price; weekly-billed plans converted to a monthly figure). Updated November 2, 2026
| QuillBot | ChatGPT | |
|---|---|---|
| Built for | Paraphrasing and polishing existing text | Writing, research, images, coding |
| Free tier | Paraphrase up to 125 words; humanizer 6 uses/day | Unlimited text chats with GPT-6 Luna |
| Paid plan | Premium: unlimited paraphrasing in 9+ modes, AI chat | Go: image generation, memory & projects |
| Checking tools | AI detector; plagiarism checker (25,000 words/mo) | Not a plagiarism or AI-text checker |
| Higher tiers | Team plan, per seat, billed annually | Plus, Pro and Pro 500 for heavier use |
you're a student or ESL writer who rephrases sources daily and needs plagiarism checks alongside.
you rewrite text only sometimes and want one free or cheap assistant that handles rewriting along with everything else.
ChatGPT is more flexible, because you can describe exactly how to rewrite something. QuillBot gives fixed paraphrase modes, a humanizer and a plagiarism checker in one place, which some students prefer.
Not reliably. Humanized output can still trip AI detectors, so don't rely on it where AI use isn't allowed.
Yes, but the free paraphraser stops at 125 words and the humanizer allows 6 uses a day, so regular users upgrade quickly.
How we choose: prices come from each vendor's official pricing page and are re-checked every week. We take no affiliate fees, so rankings aren't for sale.