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Side-by-side comparison · Writing & Translation

Grammarly 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.

Best overall

Grammarly

4.3

From $12/member/mo

Lara Translate

4.2

From $0

Undetectable AI

3.6

From $0

Comparing 3 tools, the maximum.

At a glance

Best overallEasiest to use

Pick it if: Anyone who writes emails, documents and messages at work and wants mistakes caught and tone checked before they hit send.

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.

Grammarly scores highest overall, but Lara Translate gives you more for your money. Which one is right comes down to what you value most.

Overview

AttributeGrammarlyLara TranslateUndetectable AI
In one lineFixes grammar, clarity and tone in your writing, wherever you type.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$12/member/mo$0$0
Free plan Yes Yes Yes
Works with Claude Code No Yes Yes

Rating breakdown

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

AttributeGrammarlyLara TranslateUndetectable AI
Overall rating4.3Winner4.23.6
Ease of useHow quickly someone non-technical gets value from it.
5.0
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.
4.0
4.0
3.0
Value for moneyWhat you get for the price, including the free plan.
3.5
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.

AttributeGrammarlyLara TranslateUndetectable AI
Access & platform
Free plan Yes Yes Yes
Mobile app Yes Yes No
Desktop app Yes––
Browser extension 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 No
Open source or self-hosted No No No
AI abilities
Works with your files– 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
Learns your brand or style Yes Yes–
Works in many languages– Yes Yes
Capabilities score8/ 1710/ 176/ 17

Pricing

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

AttributeGrammarlyLara TranslateUndetectable AI
Plans

Free

Free

Basic spelling and grammar checks.

Free

$0

Trying it on a few documents.

Free

$0

Testing one short piece.

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

$9.99/mo billed yearly

Individuals translating every week.

10K words

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

Occasional use.

Enterprise

Custom

Large organisations with security needs.

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.

Enterprise

Custom

Large organisations.

Larger plans

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

Agencies and high volume.

Which plan to pickFree 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.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

AttributeGrammarlyLara TranslateUndetectable AI
Standout features
  • Live checking everywhere
  • Clarity and rewrites
  • Tone detection
  • AI writing assistant
  • Plagiarism and AI detection
  • Team style guides
  • 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

AttributeGrammarlyLara TranslateUndetectable AI
Pros
  • Works live in almost every app you type in
  • Free plan is useful for everyday spelling and grammar
  • Tone feedback helps with tricky messages
  • Team style guides keep company writing consistent
  • Yearly Pro price is reasonable for daily use
  • 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
  • Free plan no longer includes sentence rewrites and caps AI prompts at 100 a month
  • Monthly billing costs more than double the yearly rate
  • Accepting every suggestion can strip your own voice
  • Strongest in English only
  • Withdrew its "Expert Review" feature in 2026 after a lawsuit over using authors' identities
  • 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

AttributeGrammarlyLara TranslateUndetectable AI
Best for
  • Proofreading emails and documents as you type
  • Checking tone before a tricky message goes out
  • Writing at work in English as a second language
  • Keeping a team's writing style consistent
  • Plagiarism checks on content
  • 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
  • Office staff
  • Sales and support teams
  • Non-native English writers
  • Students
  • Marketers
  • Marketing teams
  • Online stores
  • Agencies
  • Customer support teams
  • Freelance translators
  • Content marketers
  • Bloggers
  • Freelance writers
  • SEO agencies
  • Students

Questions people ask

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

Grammarly scores highest overall in our ratings (Grammarly 4.3/5, Lara Translate 4.2/5 and Undetectable AI 3.6/5). Grammarly is best for proofreading emails and documents as you type and checking tone before a tricky message goes out. 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, Grammarly, Lara Translate or Undetectable AI?

Grammarly: There's a free plan, and paid plans start at $12/member/mo. 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.

Which is easier to use, Grammarly, Lara Translate or Undetectable AI?

Grammarly rates highest for ease of use in our scores. Anyone who writes emails, documents and messages at work and wants mistakes caught and tone checked before they hit send.

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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