Grammarly vs QuillBot: Which Writing Helper Wins in 2026
Grammarly and QuillBot get compared constantly, and the comparison is usually framed as a price fight. It isn't. They sit at different moments in the writing process, and once you see that, the choice gets easy.
Here's the short version before the detail:
- Pick Grammarly if you want errors caught as you type, in every app you write in.
- Pick QuillBot if you mainly rework text you already have — paraphrasing, summarising, citations.
- Pick neither on monthly billing. Both charge roughly 2.5x more per month if you don't commit to a year.
The pricing, and the trap inside it
Both tools have genuinely usable free tiers, which is why "Grammarly vs QuillBot free" is such a common search. Here's published pricing verified in September 2026.
| Plan | Grammarly | QuillBot |
|------|-----------|----------|
| Free | Basic grammar, spelling, punctuation, tone detection, ~100 AI prompts/month | Paraphraser capped at 125 words per pass, 2 modes, grammar checker, short summaries |
| Monthly | $30.00/mo | $19.95/mo |
| Quarterly | — | $39.95/quarter (~$13.31/mo) |
| Annual | $12.00/mo ($144/yr) | $8.33/mo ($99.95/yr) |
| Team/Business | $15/user/mo (billed annually) | — |
Read across that table carefully, because the interesting number isn't the headline — it's the ratio.
Grammarly monthly is 2.5x its annual rate. $30 against $12, for the identical product.
QuillBot monthly is 2.4x its annual rate. $19.95 against $8.33.
That is not a small penalty. If you are paying month to month on either tool, you are effectively buying the same subscription two and a half times over. Unless you genuinely need the tool for one month only, annual billing is the correct default — and it's the single biggest money decision in this comparison, bigger than which tool you choose.
On annual billing, QuillBot is cheaper: $99.95/year against Grammarly's $144/year, a saving of about $44. On monthly billing QuillBot is still cheaper ($19.95 vs $30). So QuillBot wins on price at every billing cycle.
But cheaper only matters if rewriting is the job you actually have. If your problem is comma splices, tone and correctness, the cheaper tool is the wrong tool at any price.
What each tool is actually built to do
This is where the comparison stops being about money.
### Grammarly: an editor that watches you write
Grammarly's strength is real-time correction across everything you type. It runs in roughly 500,000 apps and sites, plus dedicated iOS and Android keyboards, browser extensions, and desktop clients. Its suggestions are context-aware — it reads the sentence, not just the word — and it explains why it flagged something.
On the paid plan you get full-sentence rewrites, tone and clarity suggestions, a plagiarism scanner with no monthly page quota, and team style guides. Free users keep the basics: grammar, spelling, punctuation and tone detection, plus around 100 AI prompts a month.
The trade-offs are real. Pro is the more expensive subscription. Recent updates push generative-AI prompts fairly aggressively, which annoys people who just wanted quiet proofreading. And it has one rewrite style — no mode selection — so if you want to see several alternative phrasings, it won't give you a menu.
There's also a stylistic warning worth knowing: Grammarly sometimes recommends changes that flatten a distinctive voice into generic corporate prose. If you write with personality, review its suggestions rather than accepting them all.
### QuillBot: a transformer for text you already have
QuillBot is built around paraphrasing and summarising first, with grammar checking bolted on. Premium unlocks unlimited paraphrasing across nine rewriting modes, a plagiarism checker, a citation generator supporting thousands of styles, a translator, and a summariser with much higher input limits.
The free tier is genuinely usable for isolated paragraphs: 125 words per pass in two modes, no credit card. It forces a lot of copy-pasting on longer documents, but it tells you quickly whether the output sounds like you.
QuillBot's weaknesses mirror Grammarly's strengths. Its grammar engine is noticeably less sophisticated — fine on mechanics, rarely useful on style. Its paraphraser can drift toward stiff, over-formal academic phrasing that reads badly in business email. And on the more aggressive modes it occasionally introduces awkward constructions, so output needs a proofread before you send it.
One more limit that matters if you scan long documents often: QuillBot's plagiarism checker is capped (roughly 20 pages or 25,000 words per month), while Grammarly's is unlimited on paid plans. For a content team or a graduate student running frequent checks, that cap is the thing that will annoy you.
Feature comparison
| | Grammarly | QuillBot |
|--|-----------|----------|
| Core job | Real-time correction | Paraphrasing and summarising |
| Where it works | ~500,000 apps and sites, desktop, mobile keyboards | Web editor, browser extensions |
| Grammar accuracy | Stronger, context-aware, explains corrections | Adequate on mechanics, weak on style |
| Rewrite modes | One style | Nine modes |
| Plagiarism check | Unlimited on paid | Capped (~20 pages/month) |
| Citations | No | Yes, thousands of styles |
| Summariser | Limited | Yes, higher limits when paid |
| Translation | No | Yes, 50+ languages |
| Free tier | Practical for everyday grammar | Narrow (125 words/pass) |
| Annual price | $144/yr | $99.95/yr |
An honest warning about paraphrasing tools
QuillBot-rewritten text can be flagged by AI detectors, especially with aggressive paraphrasing, and schools and publishers do run detection on submitted work. Turnitin states its AI-writing detection is built to flag AI-paraphrased text.
Use a paraphraser to improve writing you did yourself — not to disguise authorship or get around an integrity policy. That's true of every tool in this category, including the one we recommend.
Separately, and this applies to both tools: always read a paraphrase back for meaning. A rewriter optimises for different wording, not for preserving technical accuracy. The sentence that comes out can be smoother and less true than the one that went in.
How to choose
Start with the free plans. Both have one, and both are good enough to answer the only question that matters: does this fit how you write? Test each on a real piece of your own work before paying anything.
Choose Grammarly if you write daily in email, docs and browsers, and want errors caught the moment you make them. The extra few dollars buys broader and deeper correction, and it works where you already work.
Choose QuillBot if most of your work is reworking existing text — study notes, content repurposing, summarising sources, building citations — and the annual plan costs less.
Use both if your workflow runs from drafting through rewriting to final proofreading. They overlap less than people assume: QuillBot transforms, Grammarly polishes. Running a draft through QuillBot first and Grammarly last is a legitimate stack, and at $99.95 + $144 a year it's still under $250 annually.
If you're comparing broader content-generation platforms rather than writing assistants, see our guide to AI writing tools — generators like Jasper and Rytr solve a different problem again.
FAQ
Is QuillBot or Grammarly cheaper?
QuillBot, at every billing cycle. Annual is $99.95/year (~$8.33/mo) versus Grammarly's $144/year ($12/mo); monthly is $19.95 versus $30.
Is Grammarly worth it in 2026?
If you write every day in email and documents, Pro usually pays for itself in saved editing time — but only on annual billing. At $30/month it's a much harder sell.
Can I use both together?
Yes, and many people do. QuillBot for reworking and summarising, Grammarly for the final proofread.
Does QuillBot have a free plan?
Yes. 125 words per paraphrase pass, two modes, the grammar checker, short summaries, plus the citation generator and translator. No card required.
Which is better for students?
QuillBot for paraphrasing, summarising and citations at a lower annual price. Grammarly if you want stronger grammar correction across every app you write in. Both have free tiers, so test before buying.
Bottom line: match the tool to the moment. Grammarly produces clean text in the first place; QuillBot transforms text you already have. Whichever you pick, buy it annually.
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