Undetectable AI Review
Best all-in-one suiteBest all-in-one
Undetectable AI bundles a humanizer, unlimited AI detection and a human auto-typer into one subscription. It is API compatible and refunds the cost of any humanization that gets flagged as not human. On yearly billing it starts at $5/mo, the joint-cheapest paid entry in this list, although that plan's 10,000-word monthly cap is modest.
Undetectable AI pros and cons
Pros
- From $5/mo billed yearly
- Unlimited AI detection
- Money-back if output is flagged
Cons
- 10,000 words/month on the cheapest plan
Undetectable AI pricing (November 2026)
| Plan | Monthly | Yearly (per mo) | What's included |
|---|---|---|---|
| 10K | $9.99/mo | $5/mo | 10,000 words/mo |
| 20K | $19/mo | $9.50/mo | 20,000 words/mo |
| 35K | $31/mo | $15.75/mo | 35,000 words/mo |
| 50K | $42.50/mo | $21.25/mo | 50,000 words/mo |
Free trial limited to 250 words. Business plans with non-expiring credits are available on request. Prices are in USD and were taken from Undetectable AI's own pricing page in November 2026. "—" means the vendor doesn't publish that figure.
Key features
- Humanizer with writing-level matching
- Unlimited AI detection
- Unlimited Human Auto Typer
- API compatible
- Refund if output is flagged as not human
Who is Undetectable AI best for?
A humanizer, unlimited AI detection and an auto-typer in one subscription. It offers API access and refunds the cost of any humanization that is flagged as not human.
Undetectable AI alternatives
Undetectable AI FAQ
Is Undetectable AI free?
Undetectable AI has a free option: 250-word trial. Paid plans start from $5/mo.
How much does Undetectable AI cost?
Undetectable AI pricing in November 2026: 10K $9.99/mo ($5/mo billed yearly); 20K $19/mo ($9.50/mo billed yearly); 35K $31/mo ($15.75/mo billed yearly); 50K $42.50/mo ($21.25/mo billed yearly).
Does Undetectable AI have an AI detector?
Yes. Undetectable AI includes a built-in AI detector, so you can check your text before and after humanizing it.
Is Undetectable AI the best AI humanizer?
Undetectable AI is ranked #3 of 19 in our November 2026 rankings (8.8/10), and is our pick for "all-in-one suite". Our #1 overall pick is GPTHuman AI.
What are the best Undetectable AI alternatives?
The best Undetectable AI alternatives are GPTHuman AI (best overall AI humanizer), StealthWriter (best free daily allowance), WriteHuman (best for multiple output versions), StealthGPT (best for high monthly volume).