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Side-by-side comparison · Writing & Translation

DeepL vs GPTZero vs ProWritingAid

Everything that matters when choosing between them, in one place: our rating, what each can do, what they cost, and the trade-offs.

DeepL

4.2

From $10.49/mo

GPTZero

4.2

From $0

ProWritingAid

3.9

From $0

Comparing 3 tools, the maximum.

At a glance

Easiest to use

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.

Pick it if: Authors, bloggers and anyone writing long documents who wants detailed feedback on style as well as typos.

Overview

AttributeDeepLGPTZeroProWritingAid
In one lineTranslates text, whole documents and live conversations, with natural-sounding results.Checks whether text was written by AI, with plagiarism and citation checks too.Grammar and style checker for authors, with in-depth reports on long manuscripts.
Pricing modelFreemiumFreemiumFreemium
Starting price$10.49/mo$0$0
Free plan Yes Yes Yes
Works with Claude Code Yes Yes No

Rating breakdown

Our scores out of 5. The higher bar in each row is highlighted.

AttributeDeepLGPTZeroProWritingAid
Overall rating4.24.23.9
Ease of useHow quickly someone non-technical gets value from it.
5.0
4.5
3.5
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.
4.0
3.5
4.0
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.
4.0
4.5
3.5

Feature comparison

A tick means it does this today. A dash means we haven't checked.

AttributeDeepLGPTZeroProWritingAid
Access & platform
Free plan Yes Yes Yes
Mobile app Yes No No
Desktop app Yes– Yes
Browser extension Yes Yes Yes
API access Yes Yes–
Teams & business
Team workspace Yes Yes No
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 Yes
Understands images 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– Yes
Works in many languages Yes Yes–
Capabilities score12/ 178/ 176/ 17

Pricing

Plans as listed on each vendor's site when we last checked. Confirm before you buy.

AttributeDeepLGPTZeroProWritingAid
Plans

Free

Free

Occasional emails and short text.

Free

$0

Checking the odd document.

Free

$0

Trying the reports on short pieces.

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.

PremiumOur pick

$30/mo, or $10/mo billed yearly ($120)

Writers editing regularly.

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.

Premium Pro

$36/mo, or $12/mo billed yearly ($144)

Authors who want feedback and a community.

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 pickStart 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.Try Free on a chapter or a long blog post. If it clicks, Premium on yearly billing is good value, and the lifetime deal pays off after about three years. Premium Pro is for authors who want daily critiques and the workshops.

Key features

AttributeDeepLGPTZeroProWritingAid
Standout features
  • Text translation
  • Document translation
  • Glossaries and style rules
  • DeepL Write
  • DeepL Voice
  • Apps and API
  • AI detection
  • Plagiarism check
  • Writing replay
  • Citation and hallucination check
  • Batch scans
  • API and school integrations
  • Grammar and spelling
  • 25+ writing reports
  • Chapter Critique
  • Rephrase and Sparks
  • Story Canvas and Outline Crafter
  • Works where you write

Pros and cons

AttributeDeepLGPTZeroProWritingAid
Pros
  • More natural translations than Google Translate in most European languages
  • Documents keep their formatting after translation
  • Glossaries keep your terms consistent
  • Paid plans don't store or train on your text
  • A European company, which matters to businesses avoiding US tools
  • Clear sentence-level highlights, so you see exactly what looks AI-written
  • Generous free plan for occasional checks
  • Writing replay gives honest writers a way to prove their work
  • Flags made-up citations, which most detectors don't
  • API and batch scans for larger volumes
  • The most detailed style reports of any writing checker
  • Explains its suggestions, so you improve over time
  • Lifetime plan means no ongoing subscription
  • Works in Word, Google Docs and Scrivener
  • AI feedback built for fiction writers
Cons
  • Free plan is small: 50,000 characters and one file a month
  • Weaker on Japanese, Chinese and Korean than a good chat assistant, and newer languages are uneven
  • Many complaints about renewal charges, refused refunds and slow support, so diarise the end of any trial
  • Long-time users report it got slower and less literal in 2026, sometimes rewording the meaning, so legal text still needs a human
  • Glossary and file limits are tight on the cheaper plans
  • False positives happen, and short or formal writing gets flagged more often
  • Edited or reworded AI text can get past it
  • The best scan and plagiarism checks need a paid plan
  • Mostly designed around schools, so some features won't matter to a business
  • So many reports that it takes time to learn
  • Monthly billing is expensive next to yearly
  • Free plan is limited to 500 words per check
  • Can feel slow on very long documents
  • Overkill for quick business emails

Who each one is for

AttributeDeepLGPTZeroProWritingAid
Best for
  • Translating Word, PowerPoint and PDF files with layout kept
  • Customer emails in another language
  • Keeping product terms consistent with glossaries
  • Live translated meetings
  • Polishing English as a second language
  • Checking essays and assignments for AI writing
  • Screening freelance or agency content
  • Spotting made-up citations in reports
  • Showing you wrote a document yourself
  • Editing a novel or long manuscript
  • Finding repeated words and clunky sentences
  • Learning to write better as you edit
  • Editing inside Word, Google Docs or Scrivener
You'll find it used by
  • Exporters and importers
  • Customer support teams
  • Agencies
  • Translators
  • Legal and HR teams
  • Teachers
  • Editors
  • Content agencies
  • Recruiters
  • Students
  • Novelists
  • Bloggers
  • Non-fiction authors
  • Students
  • Editors

Questions people ask

Which is better, DeepL, GPTZero or ProWritingAid?

They tie on our overall rating (DeepL 4.2/5, GPTZero 4.2/5 and ProWritingAid 3.9/5). 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. ProWritingAid is best for editing a novel or long manuscript and finding repeated words and clunky sentences.

Which is cheaper, DeepL, GPTZero or ProWritingAid?

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. ProWritingAid: There's a free plan, and paid plans start at $0.

Which is easier to use, DeepL, GPTZero or ProWritingAid?

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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