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Comparison · prices checked every day
Grammarly vs QuillBot: which is worth paying for?
The current plans and our verdict on each tool, side by side. Prices come from each vendor's own pricing page and are checked every day.
Prices, verdicts, test results or user reports behind this comparison changed on Oct 2, 2026. We are re-checking it; the plan table below always shows the current prices.
The short answer
Choose Grammarly if…
- you need heavy AI writing with up to 2,000 monthly prompts and plagiarism checks
- you want enterprise-grade grammar with up to 149 seats and unlimited AI prompts
Choose QuillBot if…
Our pick for most people
- you want the lower $19.95/month price for full paraphrasing and AI tools
- you need unlimited paraphrasing modes and a humanizer without a high monthly cost
Bottom line: QuillBot by QuillBot is the better paid choice for most writers at $19.95/month.
Key differences
- Grammarly by Grammarly costs $30/month or $144/year. pricing pageSource · vendor pagePricing page (support.grammarly.com), checked Sep 28, 2026.Go to sources ↓
- QuillBot by QuillBot costs $19.95/month or $99.95/year. plan list checked by handSource · owner-checked plan listPlan list checked by hand (quillbot.com), checked Sep 28, 2026.Go to sources ↓
- Grammarly by Grammarly Pro includes up to 2,000 AI prompts monthly and plagiarism checks. pricing pageSource · vendor pagePricing page (support.grammarly.com), checked Sep 28, 2026.Go to sources ↓
- QuillBot by QuillBot Premium includes full access to paraphrasing, humanizer, and AI detector. plan list checked by handSource · owner-checked plan listPlan list checked by hand (quillbot.com), checked Sep 28, 2026.Go to sources ↓
- Grammarly by Grammarly scored 8.8/10 on grammar fixes 8.8Our test · free tierGrammarly · Fix grammar mistakes: 8.8/10, 3 of 4 checks passed.Read the answer ↓.
- QuillBot by QuillBot scored 7.5/10 on grammar fixes 7.5Our test · free tierQuillBot · Fix grammar mistakes: 7.5/10, 2 of 4 checks passed.Read the answer ↓.
Plans and limits side by side
| Plans | Grammarly | QuillBot |
|---|---|---|
| Free plan | Free $0AI prompts 100 monthly | Free $0Paraphrasing Up to 100 words, 2 modes, Humanizer Up to 100 words, limited usage, AI Detec… |
| Paid plans | — | Premium $19.95/mo or $99.95/yrParaphrasing Full access, unlimited modes, Humanizer and AI Detector Full access, Billing… |
| Business plans | Pro $30/user/mo or $144/user/yrAI prompts 2,000 monthly, Seats up to 149Enterprise CustomMembers Unlimited, Generative AI prompts Unlimited | Team Plan CustomTeam Usage metrics, user management, centralized billing |
From each vendor's own pricing page · Grammarly checked Oct 2, 2026 · QuillBot checked Sep 28, 2026.
Our tests
Scores out of 10 on the same tasks of our public test suite ("Grammar checkers and paraphrasers", version 1), run hands-on in each app, scored by the same blind judges.
| Task | Grammarly · free tier | QuillBot · free tier |
|---|---|---|
| Fix grammar mistakes | 8.8/10 | 7.5/10 |
| Fix spelling mistakes | 10.0/10 | 10.0/10 |
| Fix punctuation and capitals | 8.7/10 | 8.7/10 |
| Fix run-on sentences | 10.0/10 | 9.5/10 |
| Make the tense consistent | 10.0/10 | 10.0/10 |
| Leave correct text alone | 10.0/10 | 10.0/10 |
| Keep technical terms unchanged | 10.0/10 | 10.0/10 |
| Paraphrase and keep the facts | 10.0/10 | 5.2/10 |
| Rewrite in a formal tone | 9.8/10 | — |
| Average | 9.7/10 | 8.9/10 |
Grammarly by Grammarly scored 8.8/10 on fixing grammar mistakes 8.8Our test · free tierGrammarly · Fix grammar mistakes: 8.8/10, 3 of 4 checks passed.Read the answer ↓. Grammarly by Grammarly scored 10.0/10 on fixing spelling mistakes 10.0Our test · free tierGrammarly · Fix spelling mistakes: 10.0/10, 2 of 2 checks passed.Read the answer ↓. Grammarly by Grammarly scored 10.0/10 on fixing run-on sentences 10.0Our test · free tierGrammarly · Fix run-on sentences: 10.0/10, 2 of 2 checks passed.Read the answer ↓. QuillBot by QuillBot scored 7.5/10 on fixing grammar mistakes 7.5Our test · free tierQuillBot · Fix grammar mistakes: 7.5/10, 2 of 4 checks passed.Read the answer ↓. QuillBot by QuillBot scored 10.0/10 on fixing spelling mistakes 10.0Our test · free tierQuillBot · Fix spelling mistakes: 10.0/10, 2 of 2 checks passed.Read the answer ↓. QuillBot by QuillBot scored 5.2/10 on paraphrasing while keeping facts 5.2Our test · free tierQuillBot · Paraphrase and keep the facts: 5.2/10, 2 of 3 checks passed.Read the answer ↓.
What users say
Grammarly
One reviewer on Hacker News says Grammarly is using our identities without permission HNUser report · negative · Hacker NewsPosted Mar 9, 2026See the report ↓. Another user notes that Grammarly is using authors' identities without permission unless they opt out HNUser report · negative · Hacker NewsPosted Mar 10, 2026See the report ↓. A different commenter states that Grammarly is using our identities without permission HNUser report · negative · Hacker NewsPosted Mar 7, 2026See the report ↓. Some users feel that Grammarly was not essential for their writing needs HNUser report · negative · Hacker NewsPosted Jan 16, 2026See the report ↓.
Reports cited (4)
Grammarly is using our identities without permission
Grammarly is using authors' identities without permission unless they opt out
Grammarly is using our identities without permission
I thought Grammarly was essential. It wasn't
QuillBot
We do not have enough user reports about QuillBot yet.
Questions people ask
Which tool is cheaper?
QuillBot by QuillBot is cheaper at $19.95/month compared to Grammarly by Grammarly at $30/month.
Does Grammarly have a free plan?
Yes, Grammarly by Grammarly has a free plan with 100 monthly AI prompts.
Does QuillBot have a free plan?
Yes, QuillBot by QuillBot has a free plan with limited paraphrasing and grammar features.
Which tool is better for grammar?
Grammarly by Grammarly did better on grammar fixes than QuillBot by QuillBot.
Sources
Drafted with AI from these pages, our tests and the linked user reports, and checked automatically against them before publishing: every price, score and report above is tied to the tool it is about.
Grammarly
- Pricing page · checked Sep 28, 2026support.grammarly.com/hc/en-us/articles/115000090011-How-mu… ↩ text
- Pricing pagegrammarly.com/pro
QuillBot
- Pricing pagequillbot.com/premium
- Plan list checked by hand on Sep 28, 2026quillbot.com/premium ↩ text
Each tool's verdict and plans
Grammarly
DEPENDS DEPENDS — worth it for some people
Grammarly's free plan handles grammar and spelling well; Pro is for heavy AI use with 2,000 prompts a month.
Tested by us on Sep 30, 2026 · with user reports
- Cheapest paid
- $30/user/mo
- What's free
- $0
- Our test score
- 9.7/10
Our test (hands-on): free tier 9.7/10, as of Sep 30, 2026
Pro
$30/user/mo
or $144/user/yr
Enterprise
Custom
QuillBot
DEPENDS DEPENDS — worth it for some people
Free handles basic grammar well, but paid unlocks full paraphrasing and AI tools for serious writers.
Tested by us on Sep 30, 2026
- Cheapest paid
- $19.95/mo
- What's free
- $0
- Our test score
- 8.9/10
Our test (hands-on): free tier 8.9/10, as of Sep 30, 2026
Free
$0
Premium
$19.95/mo
or $99.95/yr
Team Plan
Custom
How we make money
The "Visit" buttons go through shouldipay.ai/go/ and may be affiliate links, but commissions never decide a verdict or a comparison: the evidence does. Affiliate disclosure