Side-by-side comparison · Writing & Translation
Google Translate vs Grammarly 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.
Comparing 3 tools, the maximum.
At a glance
Pick it if: Anyone who needs a quick, free translation, from travellers reading a menu to small businesses answering an overseas customer.
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: Marketers and writers who use AI for first drafts and want them to sound less robotic.
Overview
| Attribute | Google Translate | Grammarly | Undetectable AI |
|---|---|---|---|
| In one line | Free translation of text, documents, photos and conversations in 240+ languages. | Fixes grammar, clarity and tone in your writing, wherever you type. | Rewrites AI-written text so it reads more human and is less likely to get flagged. |
| Pricing model | Free | Freemium | Freemium |
| Starting price | Pay per character | $12/member/mo | $0 |
| Free plan | Yes | Yes | Yes |
| Works with Claude Code | Yes | No | Yes |
Rating breakdown
Our scores out of 5. The higher bar in each row is highlighted.
| Attribute | Google Translate | Grammarly | Undetectable AI |
|---|---|---|---|
| Overall rating | 4.5Winner | 4.3 | 3.6 |
| Ease of useHow quickly someone non-technical gets value from it. | 5.0 | 5.0 | 4.0 |
| FeaturesHow completely it covers its own job, and how well the pieces fit together. | 4.5 | 4.5 | 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. | 5.0 | 3.5 | 3.5 |
| 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 | Google Translate | Grammarly | Undetectable AI |
|---|---|---|---|
| Access & platform | |||
| Free plan | Yes | Yes | Yes |
| Mobile app | Yes | Yes | No |
| Desktop app | No | Yes | – |
| Browser extension | Yes | Yes | Yes |
| API access | Yes | – | Yes |
| Teams & business | |||
| Team workspace | No | 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 | No | Yes | – |
| Works in many languages | Yes | – | Yes |
| Capabilities score | 9/ 17 | 8/ 17 | 6/ 17 |
Pricing
Plans as listed on each vendor's site when we last checked. Confirm before you buy.
| Attribute | Google Translate | Grammarly | Undetectable AI |
|---|---|---|---|
| Plans | Google TranslateOur pick Free Everyone. | Free Free Basic spelling and grammar checks. | Free $0 Testing one short piece. |
Cloud Translation API Pay per character, with a free monthly allowance Developers adding translation to an app or website. | ProOur pick $12/member/mo billed yearly, or about $30 monthly Anyone who writes a lot at work, alone or in a team. | 10K words $9.99/mo, or $5/mo billed yearly ($60) Occasional use. | |
Enterprise Custom Large organisations with security needs. | 20K wordsOur pick $19/mo, or $9.50/mo billed yearly ($114) Regular blog content. | ||
Larger plans From $31/mo, or $15.75/mo billed yearly Agencies and high volume. | |||
| Which plan to pick | Use the free app and website. Only look at the Cloud Translation API if you're building translation into your own website or system. | 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. | 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
| Attribute | Google Translate | Grammarly | Undetectable AI |
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Pros and cons
| Attribute | Google Translate | Grammarly | Undetectable AI |
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Who each one is for
| Attribute | Google Translate | Grammarly | Undetectable AI |
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Questions people ask
Which is better, Google Translate, Grammarly or Undetectable AI?
Google Translate scores highest overall in our ratings (Google Translate 4.5/5, Grammarly 4.3/5 and Undetectable AI 3.6/5). Google Translate is best for quick translations of emails and messages and reading signs and menus with your camera. Grammarly is best for proofreading emails and documents as you type and checking tone before a tricky message goes out. Undetectable AI is best for Making AI drafts sound less robotic and seeing how detectors might score your text.
Which is cheaper, Google Translate, Grammarly or Undetectable AI?
Google Translate: There's a free plan, and paid plans start at Pay per character. Grammarly: There's a free plan, and paid plans start at $12/member/mo. 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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