Compare · Undetectable.ai
Undetectable.ai alternative that shows its working
People comparing Undetectable.ai alternatives usually like the core idea of an AI humanizer but want two things more clearly: evidence of what the rewrite actually changed, and output that still reads well. The worry is paying for a rewrite and then having to check it elsewhere or fix awkward sentences.
Undetectable.ai is one of the best-known humanizers and a capable tool. Undetected.ai shares the same goal and leans into the wedge: our own AI-pattern gauge that animates from the score on your draft to the score on the rewrite, the specific reasons behind each number, and meaning-preserving prose you can publish as is. We label that score as ours, because we have no access to GPTZero, Turnitin or any other detector.
2 free runs a day, up to 200 words each. We save your run so you can get back to it, and a delete button appears with the result. See privacy.
This is our own AI-pattern score, measured here on sentence rhythm, template phrases, vocabulary variety and passive voice. It is not a GPTZero, Turnitin, Originality.ai, Copyleaks or ZeroGPT result, and it does not predict one. Worth knowing: we also ask the rewrite to vary sentence length, drop template phrases and prefer the active voice, so some of the drop is built in. Read the two panels below, not just the number.
Before ·
After ·
Meaning kept · Your own text rewritten · Saved to your history, delete any time
The short answer
The best Undetectable.ai alternative depends on what you feel it is missing. If you want to read what the rewrite changed instead of trusting a status message, Undetected.ai shows our own AI-pattern score before and after with the reasons behind it, from $9 a month for 15,000 words. Undetectable.ai stays the cheapest at about $5 a month billed yearly and has the wider feature set, so weigh price against proof.
Reviewed July 2026. Both tools are capable; the differences below are what actually decide it.
Undetectable.ai is a strong, established humanizer; Undetected.ai adds our own AI-pattern score before and after, the reasons behind it, and meaning-preserving output.
Prices we read ourselves
What Undetectable.ai costs, and what we cost
Read off each vendor's own pricing page on the date shown, not copied from a roundup. Where the yearly rate is cheaper we lead with it, because that is the number buyers compare.
| Undetected.ai | Undetectable.ai | |
|---|---|---|
| Cheapest paid plan | $9/mo billed yearly ($12 monthly) | $5/mo billed yearly ($9.99 monthly, $60/yr) |
| What that carries | 15,000 words/mo across 60 runs, 1,500 words a run | 10,000 words/mo. 20,000 at $9.50/mo yearly, 35,000 at $15.75, 50,000 at $21.25 |
| Try it before paying | Free account: 3 runs/day, 9,000 words/mo | Yes, a free trial. The pricing page does not state the word allowance |
| Where they win | One pass over your own text, with our AI-pattern score and its reasons | Cheapest annual price in the category, the widest feature set, writing-level matching, unlimited detection checks and API access on every tier |
Undetectable.ai pricing read July 31, 2026. All figures in USD. Promotional rates move constantly, so confirm on the vendor's own page before you buy. We build one of these tools.
Not sure any of them do what they claim? We published the ten-minute test for whether an AI humanizer actually works, which costs nothing and settles it on your own writing.
Side by side
Undetected.ai vs Undetectable.ai, honestly
A fair look at what each does well. Both are capable tools. Here is where they differ.
| What matters | Undetected.ai | Undetectable.ai |
|---|---|---|
| Our AI-pattern score in the tool | Animated AI-pattern gauge, our score before and after, so you read the result before copying | Returns humanized text and reports a status |
| The reasons behind the score | Lists what earned the number: which template phrases were found, how little the sentence lengths varied | Markets broad detector coverage |
| Meaning preserved | Rewrites for rhythm while keeping facts and argument intact | Offers multiple readability and strength modes |
| What you see after the rewrite | Our own AI-pattern score before and after, with its reasons | Aims to pass major detectors as well |
| Try before you pay | Free account: 3 runs/day, 9,000 words/mo. Paid plans planned from $9 a month for 15,000 words | A free trial, plus paid tiers from about $5 a month billed yearly |
| Best suited for | Writers who want visible proof and readable output | Users wanting an established, full-featured humanizer |
Comparison reflects general, publicly understood positioning. Capabilities change, so check each product for the latest.
Want the full head-to-head with verified pricing tables? Read Undetectable AI vs Undetected AI.
If price is what is driving the switch, every Undetectable.ai tier and its real cost per 1,000 words is laid out on our Undetectable AI pricing breakdown.
Why writers pick Undetected.ai
The humanizer that shows its work
Transparency is the product
Undetected.ai shows our AI-pattern score before and after with its reasons, so you read what changed instead of trusting a status message.
Readable output, kept meaning
The rewrite preserves your facts and argument and returns natural prose, so you are not stuck fixing broken sentences after the humanize step.
One pass, our own score
One rewrite works on the properties every detector measures, predictability and rhythm, rather than chasing one tool at a time.
Good questions
Undetectable.ai vs Undetected.ai, answered
More comparisons
See how Undetected.ai compares
QuillBot alternative
A humanizer that rebuilds prose, not just a paraphraser.
vs HumbotHumbot alternative
A humanizer that shows its own score and readable output.
vs WriteHumanWriteHuman alternative
One pass over your own text, with our AI-pattern score and its reasons.
vs StealthGPTStealthGPT alternative
A mainstream humanizer focused on quality and proof.
vs PhraslyPhrasly alternative
Published pricing, a visible score, and its reasons on screen.
vs BypassGPTBypassGPT alternative
Bigger word pools, flat pricing, and a score that shows its working.
Further reading: Undetectable AI pricing, tier by tier · Undetectable AI Pro: the plan that does not exist · How much does an AI humanizer cost? · Humanize AI text, explained
Try Undetected.ai on your own text
Paste your own text and read the rewrite next to the original, with our AI-pattern score measured on both before you copy.
Meaning kept · Your own text rewritten · Saved to your history, delete any time