Side-by-side comparison · Writing & Translation
Copyleaks vs DeepL vs GPTZero
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: Schools, publishers and businesses that need AI and plagiarism checks together, especially across several languages.
Pick it if: Businesses that sell, support or write in more than one language, and anyone who regularly translates documents.
Pick it if: Teachers, editors and business owners who want a second opinion on whether writing they've been handed came from AI.
Overview
| Attribute | Copyleaks | DeepL | GPTZero |
|---|---|---|---|
| In one line | Checks text for AI writing and plagiarism in one scan, in over 30 languages. | Translates text, whole documents and live conversations, with natural-sounding results. | Checks whether text was written by AI, with plagiarism and citation checks too. |
| Pricing model | Freemium | Freemium | Freemium |
| Starting price | $0 | $10.49/mo | $0 |
| Free plan | Yes | Yes | Yes |
| Works with Claude Code | Yes | Yes | Yes |
Rating breakdown
Our scores out of 5. The higher bar in each row is highlighted.
| Attribute | Copyleaks | DeepL | GPTZero |
|---|---|---|---|
| Overall rating | 3.9 | 4.2 | 4.2 |
| Ease of useHow quickly someone non-technical gets value from it. | 4.0 | 5.0 | 4.5 |
| FeaturesHow completely it covers its own job, and how well the pieces fit together. | 4.5 | 4.5 | 4.5 |
| Output qualityHow good the results are before you fix them. | 3.5 | 4.0 | 3.5 |
| Value for moneyWhat you get for the price, including the free plan. | 3.5 | 3.5 | 4.0 |
| Speed & reliabilityHow fast it is and how often it falls over. | 4.0 | 4.0 | 4.5 |
Feature comparison
A tick means it does this today. A dash means we haven't checked.
| Attribute | Copyleaks | DeepL | GPTZero |
|---|---|---|---|
| Access & platform | |||
| Free plan | Yes | Yes | Yes |
| Mobile app | No | Yes | No |
| Desktop app | – | Yes | – |
| Browser extension | Yes | Yes | Yes |
| API access | Yes | Yes | Yes |
| Teams & business | |||
| Team workspace | Yes | Yes | Yes |
| Enterprise plan or SSO | Yes | Yes | Yes |
| Connects to other apps | Yes | Yes | Yes |
| Open source or self-hosted | Yes | No | No |
| AI abilities | |||
| Works with your files | Yes | Yes | Yes |
| Understands images | Yes | Yes | – |
| Makes images | No | No | No |
| Makes video | No | No | No |
| Writes code | No | No | No |
| Runs agents or automations | No | No | No |
| Learns your brand or style | – | Yes | – |
| Works in many languages | Yes | Yes | Yes |
| Capabilities score | 10/ 17 | 12/ 17 | 8/ 17 |
Pricing
Plans as listed on each vendor's site when we last checked. Confirm before you buy.
| Attribute | Copyleaks | DeepL | GPTZero |
|---|---|---|---|
| Plans | Free $0 Quick one-off checks. | Free Free Occasional emails and short text. | Free $0 Checking the odd document. |
PersonalOur pick $16.99/mo, or $13.99/mo billed yearly Individuals checking work regularly. | IndividualOur pick $10.49/mo, or $8.74/mo billed yearly One person translating most weeks. | PremiumOur pick $23.99/mo, or $12.99/mo billed yearly Teachers and editors checking work every week. | |
Pro $99.99/mo, or $74.99/mo billed yearly Teams and agencies. | Team $34.49/user/mo, or $28.74/user/mo billed yearly Small teams sharing glossaries. | Professional $45.99/mo, or $24.99/mo billed yearly Agencies and heavy users scanning lots of files. | |
Enterprise and Education Custom Companies and schools at scale. | Business $68.99/user/mo, or $57.49/user/mo billed yearly Teams translating all day. | Team Professional price per seat, 2 seats minimum Schools and businesses buying for a group. | |
Enterprise Custom Large organisations with security reviews. | |||
| Which plan to pick | Try the free checker first. Personal covers about 100 pages a month, which suits most individuals. Only move to Pro if a team needs seats or you want website scans. One credit covers 250 words or one image. | Start on Free. If you translate documents or customer emails every week, Individual on a yearly plan is the sweet spot and stops DeepL keeping your text. Move to Team only when several people need the same glossary. | Start on Free. If you check more than a few documents a week, Premium on yearly billing is the sweet spot. Professional only makes sense if you scan big batches of files. |
Key features
| Attribute | Copyleaks | DeepL | GPTZero |
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Pros and cons
| Attribute | Copyleaks | DeepL | GPTZero |
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Who each one is for
| Attribute | Copyleaks | DeepL | GPTZero |
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Questions people ask
Which is better, Copyleaks, DeepL or GPTZero?
They tie on our overall rating (Copyleaks 3.9/5, DeepL 4.2/5 and GPTZero 4.2/5). Copyleaks is best for AI and plagiarism checks in one report and checking content in languages other than English. DeepL is best for Translating Word, PowerPoint and PDF files with layout kept and customer emails in another language. GPTZero is best for checking essays and assignments for AI writing and screening freelance or agency content.
Which is cheaper, Copyleaks, DeepL or GPTZero?
Copyleaks: There's a free plan, and paid plans start at $0. DeepL: There's a free plan, and paid plans start at $10.49/mo. GPTZero: There's a free plan, and paid plans start at $0.
Which is easier to use, Copyleaks, DeepL or GPTZero?
DeepL rates highest for ease of use in our scores. Businesses that sell, support or write in more than one language, and anyone who regularly translates documents.
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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