Side-by-side comparison · Writing & Translation
Grammarly vs Originality.ai vs QuillBot
Everything that matters when choosing between them, in one place: our rating, what each can do, what they cost, and the trade-offs.
Comparing 3 tools, the maximum.
At a glance
Pick it if: Anyone who writes emails, documents and messages at work and wants mistakes caught and tone checked before they hit send.
Pick it if: Publishers, content agencies, SEO teams and businesses that commission written content and want to check it before publishing.
Pick it if: Students, non-native English writers and anyone who wants a paragraph cleaned up or reworded in one click.
Overview
| Attribute | Grammarly | Originality.ai | QuillBot |
|---|---|---|---|
| In one line | Fixes grammar, clarity and tone in your writing, wherever you type. | Checks content for AI writing, plagiarism and factual errors before you publish it. | Rewords, fixes grammar and summarises text, with an AI checker and humaniser built in. |
| Pricing model | Freemium | Freemium | Freemium |
| Starting price | $12/member/mo | $14.95/mo | $19.95/mo |
| Free plan | Yes | Yes | Yes |
| Works with Claude Code | No | Yes | No |
Rating breakdown
Our scores out of 5. The higher bar in each row is highlighted.
| Attribute | Grammarly | Originality.ai | QuillBot |
|---|---|---|---|
| Overall rating | 4.3Winner | 4.1 | 4.1 |
| Ease of useHow quickly someone non-technical gets value from it. | 5.0 | 4.0 | 5.0 |
| FeaturesHow completely it covers its own job, and how well the pieces fit together. | 4.5 | 4.5 | 4.0 |
| Output qualityHow good the results are before you fix them. | 4.0 | 3.5 | 3.5 |
| Value for moneyWhat you get for the price, including the free plan. | 3.5 | 4.0 | 4.0 |
| Speed & reliabilityHow fast it is and how often it falls over. | 4.5 | 4.5 | 4.0 |
Feature comparison
A tick means it does this today. A dash means we haven't checked.
| Attribute | Grammarly | Originality.ai | QuillBot |
|---|---|---|---|
| Access & platform | |||
| Free plan | Yes | Yes | Yes |
| Mobile app | Yes | – | Yes |
| Desktop app | Yes | – | Yes |
| Browser extension | Yes | Yes | Yes |
| API access | – | Yes | No |
| Teams & business | |||
| Team workspace | Yes | Yes | Yes |
| Enterprise plan or SSO | Yes | Yes | – |
| Connects to other apps | Yes | Yes | Yes |
| Open source or self-hosted | No | No | No |
| AI abilities | |||
| Works with your files | – | Yes | Yes |
| Understands images | – | – | No |
| Makes images | No | No | – |
| Makes video | No | No | No |
| Writes code | No | No | No |
| Runs agents or automations | – | No | No |
| Learns your brand or style | Yes | – | Yes |
| Works in many languages | – | – | Yes |
| Capabilities score | 8/ 17 | 7/ 17 | 9/ 17 |
Pricing
Plans as listed on each vendor's site when we last checked. Confirm before you buy.
| Attribute | Grammarly | Originality.ai | QuillBot |
|---|---|---|---|
| Plans | Free Free Basic spelling and grammar checks. | Free Free Checking the odd article. | Free Free Odd sentences and quick grammar checks. |
ProOur pick $12/member/mo billed yearly, or about $30 monthly Anyone who writes a lot at work, alone or in a team. | ProOur pick $14.95/mo, or $12.95/mo billed yearly Agencies and site owners checking content every week. | PremiumOur pick $19.95/mo, or $99.95/yr ($8.33/mo) Anyone rewording or checking text most weeks. | |
Enterprise Custom Large organisations with security needs. | Enterprise $179/mo, or $136.58/mo billed yearly Publishers and large content teams. | Team Per seat, billed yearly Schools and companies buying for a group. | |
| Which plan to pick | Free is enough for typo-catching. If you write for clients or customers every day, Pro on yearly billing is good value; paying monthly costs more than double. | Pro is enough for most agencies and site owners. An AI and plagiarism check together uses two credits per 100 words, so budget about 100,000 words of checked content a month. Go Enterprise only if you need the API or very high volume. | Stay on Free if you only reword the odd sentence. If you use it every week, the yearly Premium plan is far cheaper than paying monthly, but set a reminder before it renews because refunds after renewal are hard to get. |
Key features
| Attribute | Grammarly | Originality.ai | QuillBot |
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Pros and cons
| Attribute | Grammarly | Originality.ai | QuillBot |
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Who each one is for
| Attribute | Grammarly | Originality.ai | QuillBot |
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Questions people ask
Which is better, Grammarly, Originality.ai or QuillBot?
Grammarly scores highest overall in our ratings (Grammarly 4.3/5, Originality.ai 4.1/5 and QuillBot 4.1/5). Grammarly is best for proofreading emails and documents as you type and checking tone before a tricky message goes out. Originality.ai is best for checking freelance and agency content and AI and plagiarism checks in one scan. QuillBot is best for rewording a sentence or paragraph and grammar and spelling fixes.
Which is cheaper, Grammarly, Originality.ai or QuillBot?
Grammarly: There's a free plan, and paid plans start at $12/member/mo. Originality.ai: There's a free plan, and paid plans start at $14.95/mo. QuillBot: There's a free plan, and paid plans start at $19.95/mo.
How we compare
Ratings are our own, from using each tool, across ease of use, features, output quality, value for money, speed & reliability.
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