Undetectable.ai Alternative
Undetectable.ai sells a humanizer it markets as making text score as human on AI detectors, with a free AI detector next to it. Here it stands beside Blurwrite: what each costs, what the free tier covers, where Undetectable.ai is ahead and where Blurwrite works differently.
The short version
Choose Undetectable.ai if you want a free detector that takes up to 10,000 words a check, detection in more than 13 languages, or image, audio and video detection in the same account. Choose Blurwrite if you want to know which sentences read as machine-written and how sure the reading is, accuracy measured per language, and a humanizer that rewrites for style without promising any detector result.
The differences that decide it
- What you want from a rewrite. Undetectable.ai says its humanizer helps text score as human on AI detectors and offers a refund if output is flagged. Blurwrite rewrites for tone, clarity and style, and makes no promise about how any detector will read the result.
- How words are counted. Undetectable.ai plans give 10,000 to 50,000 humanizer words a month and list AI detection as unlimited. Blurwrite plans include the detector, humanizer, paraphraser, summarizer and grammar checker, with detection from a monthly pool of 50,000 to 300,000 words.
- How accuracy is reported. Undetectable.ai states 99%+ accuracy as its own claim and cites outside reviews. Blurwrite publishes measured figures per language, including the false positive rate on writing by non-native speakers.
Undetectable.ai vs Blurwrite
| Feature | Undetectable.ai | Blurwrite |
|---|---|---|
| Free tier | AI detector free with no signup, up to 10,000 words a check. A basic humanizer is free; the free trial of their Undetectable model is limited to 250 words. | One run a day on the detector, the humanizer, the paraphraser and the summarizer, no card: the detector reads the first 250 words, the humanizer the first 150. |
| Price | From 5.00 US dollars a month billed yearly (60.00 a year) for 10,000 words, or 9.99 monthly. | From 6.99 USD a month billed yearly, or 9.99 USD monthly. |
| Words and credits | 10,000 to 50,000 humanizer words a month by plan, with larger monthly tiers up to 380,000. AI detection is listed as unlimited on every plan. Words that do not expire each month are sold to businesses on request. | 50,000 to 300,000 AI detection words a month by plan (10,000 a check), plus 10,000 to 50,000 humanizer words a month, and word packs on top. |
| Languages | 50+ languages, with English described as the most accurate. | 13 languages, each calibrated on its own texts. |
| Accuracy figures published | Yes, as their own claim: 99%+ accuracy, citing outside reviews and a peer-reviewed study. | Yes, measured figures per language on the accuracy page, with the false positive rate on non-native writing. |
| Sentence marks | Not described on the detector page. It shows the AI detection probability from major checkers. | Yes, a mark on every sentence and a confidence rating, never a verdict. |
| Humanizer | Yes, the main product, marketed as helping text score as human on AI detectors, with a refund if output is flagged. | Yes, with a paraphraser and summarizer, in the same plan. |
| API | Yes, separate API plans from 29 US dollars a month for 72,500 words; detection calls cost a tenth of the humanize rate in word credits. | Yes, on Pro, using the plan's own words. |
| Plagiarism check | No source-matching plagiarism check listed. Their AI Plagiarism Checker checks for AI-generated content. | Coming soon, not live yet. |
Undetectable.ai and Blurwrite prices
Undetectable.ai
- 10K words5.00 USD
Per month, billed yearly. Monthly: 9.99 USD.
10,000 humanizer words a month, unlimited AI detecting, writing level matching, API compatible
- 20K words9.50 USD
Per month, billed yearly. Monthly: 19.00 USD.
20,000 humanizer words a month, unlimited AI detecting, writing level matching, API compatible
- 35K words15.75 USD
Per month, billed yearly. Monthly: 31.00 USD.
35,000 humanizer words a month, unlimited AI detecting, writing level matching, API compatible
- 50K words21.25 USD
Per month, billed yearly. Monthly: 42.50 USD.
50,000 humanizer words a month and all features of the smaller plans, with a slider up to 380,000 words
- API Starter29 USD
Monthly
72,500 API words, humanizer API plus text, image, audio and video detection APIs, then 0.40 USD per 1,000 words
- API Growth49 USD
Monthly
245,000 API words, the same APIs, then 0.20 USD per 1,000 words
Blurwrite
- Basic6.99 USD
Per month, billed yearly. Monthly: 9.99 USD.
50,000 AI detection, 10,000 humanizer and 10,000 paraphraser words, 20 style checks a day
- Plus9.99 USD
Per month, billed yearly. Monthly: 19.99 USD.
150,000 AI detection, 25,000 humanizer and 25,000 paraphraser words, 30 style checks a day
- Pro12.99 USD
Per month, billed yearly. Monthly: 29.99 USD.
300,000 AI detection, 50,000 humanizer and 50,000 paraphraser words, 40 style checks a day, API access
Where Undetectable.ai is ahead
- A free detector with no signup that takes up to 10,000 words a check.
- Detection and humanizing in 50+ languages, against 13 here.
- AI detection listed as unlimited on every paid plan, with no stated word cap.
- A wider detection range in one account: image, voice and video detection, plus a Chrome extension.
- Separate API plans that include text, image, audio and video detection, priced by the word.
What Blurwrite does differently
- A mark on every sentence and a confidence rating, never a single verdict.
- A separate calibration for every language offered, and the false positive rate on non-native writing published per language.
- A humanizer that rewrites for tone and style, with no promise about how any detector will read the result.
- A paraphraser, a summarizer and a grammar checker in the same plan as the detector and the humanizer.
- API access on Pro, from 12.99 USD a month billed yearly.
Which one fits your work
Choose Undetectable.ai if
you want a large free detector check, work in more than 13 languages, or also need image, audio or video detection.
Choose Blurwrite if
you want to see which sentences read as machine-written and how confident the reading is, need to know how often a detector misreads non-native writing, or want rewrites for style without any promise about detectors.
Questions before you choose
Is Blurwrite a good Undetectable.ai alternative?
It is if you want an honest reading of a text and rewrites for style: every sentence gets a mark and a confidence rating, and accuracy is published per language. If your goal is a tool sold on scoring as human in detectors, that is how Undetectable.ai describes its humanizer, and Blurwrite makes no such promise.
Is there a free Undetectable.ai alternative?
Blurwrite has a free tier with no card: one run a day on the detector, the humanizer, the paraphraser and the summarizer, and the detector reads the first 250 words. Undetectable.ai offers a free detector with no signup for up to 10,000 words a check and a free trial of 250 words on its Undetectable model.
How much text do Undetectable.ai plans cover?
Between 10,000 and 50,000 humanizer words a month on the standard plans, with larger monthly tiers up to 380,000 words. AI detection is listed as unlimited. Their API plans are priced separately, from 29 US dollars a month for 72,500 words.
Does either one check for plagiarism?
Undetectable.ai lists an AI Plagiarism Checker, which looks for AI-generated content rather than matching text against sources. The Blurwrite plagiarism check is coming soon and not live yet.
Which languages do they support?
Undetectable.ai states 50+ languages, with English the most accurate. Blurwrite detects in 13 languages, each calibrated on its own texts, with the measured figures on the accuracy page.
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