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Side-by-side comparison · Writing & Translation

GPTZero vs Lara Translate vs Undetectable AI

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

GPTZero

4.2

From $0

Lara Translate

4.2

From $0

Undetectable AI

3.6

From $0

Comparing 3 tools, the maximum.

At a glance

Pick it if: Teachers, editors and business owners who want a second opinion on whether writing they've been handed came from AI.

Best value

Pick it if: Businesses that translate marketing copy, documents or customer messages and want more control over tone and terms.

Pick it if: Marketers and writers who use AI for first drafts and want them to sound less robotic.

Overview

AttributeGPTZeroLara TranslateUndetectable AI
In one lineChecks whether text was written by AI, with plagiarism and citation checks too.Translates text and documents in context, explains its choices and matches your tone.Rewrites AI-written text so it reads more human and is less likely to get flagged.
Pricing modelFreemiumFreemiumFreemium
Starting price$0$0$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.

AttributeGPTZeroLara TranslateUndetectable AI
Overall rating4.24.23.6
Ease of useHow quickly someone non-technical gets value from it.
4.5
4.5
4.0
FeaturesHow completely it covers its own job, and how well the pieces fit together.
4.5
4.0
3.5
Output qualityHow good the results are before you fix them.
3.5
4.0
3.0
Value for moneyWhat you get for the price, including the free plan.
4.0
4.5
3.5
Speed & reliabilityHow fast it is and how often it falls over.
4.5
4.0
4.0

Feature comparison

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

AttributeGPTZeroLara TranslateUndetectable AI
Access & platform
Free plan Yes Yes Yes
Mobile app No Yes No
Desktop app–––
Browser extension Yes– Yes
API access Yes Yes Yes
Teams & business
Team workspace Yes Yes No
Enterprise plan or SSO Yes Yes–
Connects to other apps Yes Yes No
Open source or self-hosted No 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 score8/ 1710/ 176/ 17

Pricing

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

AttributeGPTZeroLara TranslateUndetectable AI
Plans

Free

$0

Checking the odd document.

Free

$0

Trying it on a few documents.

Free

$0

Testing one short piece.

PremiumOur pick

$23.99/mo, or $12.99/mo billed yearly

Teachers and editors checking work every week.

ProOur pick

$9.99/mo billed yearly

Individuals translating every week.

10K words

$9.99/mo, or $5/mo billed yearly ($60)

Occasional use.

Professional

$45.99/mo, or $24.99/mo billed yearly

Agencies and heavy users scanning lots of files.

Team

From $29.99/mo billed yearly

Small teams sharing a quota.

20K wordsOur pick

$19/mo, or $9.50/mo billed yearly ($114)

Regular blog content.

Team

Professional price per seat, 2 seats minimum

Schools and businesses buying for a group.

Enterprise

Custom

Large organisations.

Larger plans

From $31/mo, or $15.75/mo billed yearly

Agencies and high volume.

Which plan to pickStart 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.Start on Free. Pro is cheap and covers about 250 pages a month, enough for most individuals. Take Team once more than one person translates, because users are free and you only pay for the shared quota.Test the free 250 words on your own writing first. If the output works for you, a small yearly plan is cheap. Word credits reset monthly, so don't buy more than you use.

Key features

AttributeGPTZeroLara TranslateUndetectable AI
Standout features
  • AI detection
  • Plagiarism check
  • Writing replay
  • Citation and hallucination check
  • Batch scans
  • API and school integrations
  • Context-aware translation
  • Explains its choices
  • Documents with formatting
  • Voice interpreter
  • Glossaries and memory
  • API and MCP
  • AI humaniser
  • AI detector
  • Human typer
  • Image and video detectors
  • API

Pros and cons

AttributeGPTZeroLara TranslateUndetectable AI
Pros
  • 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
  • Takes context and tone into account
  • Explains why it translated something a certain way
  • Keeps document formatting, even on scanned PDFs
  • Team pricing by usage, with unlimited users
  • Generous free plan with API access
  • Simple: paste, pick a level, rewrite
  • Built-in detector shows how text might score
  • Cheap on yearly plans
  • API for bulk rewriting
  • Refund on humanised text that gets flagged
Cons
  • 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
  • Fewer languages than Google Translate
  • Newer name, with fewer app connections than DeepL
  • Free characters run out quickly on long documents
  • Prices on the website are yearly; monthly costs more
  • No guarantee text will pass detectors
  • Rewrites can read awkwardly or change your meaning
  • Using it to hide AI use can break school or client rules
  • Free trial is only 250 words
  • Its marketing promises more than any humaniser can deliver

Who each one is for

AttributeGPTZeroLara TranslateUndetectable AI
Best for
  • Checking essays and assignments for AI writing
  • Screening freelance or agency content
  • Spotting made-up citations in reports
  • Showing you wrote a document yourself
  • Translating documents with formatting kept
  • Marketing copy that needs the right tone
  • Checking why a translation reads the way it does
  • Teams sharing a glossary of brand terms
  • Making AI drafts sound less robotic
  • Seeing how detectors might score your text
  • Rewriting at a set reading level
  • Bulk rewriting through the API
You'll find it used by
  • Teachers
  • Editors
  • Content agencies
  • Recruiters
  • Students
  • Marketing teams
  • Online stores
  • Agencies
  • Customer support teams
  • Freelance translators
  • Content marketers
  • Bloggers
  • Freelance writers
  • SEO agencies
  • Students

Questions people ask

Which is better, GPTZero, Lara Translate or Undetectable AI?

They tie on our overall rating (GPTZero 4.2/5, Lara Translate 4.2/5 and Undetectable AI 3.6/5). GPTZero is best for checking essays and assignments for AI writing and screening freelance or agency content. Lara Translate is best for translating documents with formatting kept and marketing copy that needs the right tone. Undetectable AI is best for Making AI drafts sound less robotic and seeing how detectors might score your text.

Which is cheaper, GPTZero, Lara Translate or Undetectable AI?

GPTZero: There's a free plan, and paid plans start at $0. Lara Translate: There's a free plan, and paid plans start at $0. Undetectable AI: There's a free plan, and paid plans start at $0.

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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