AI Undetectable
A browser-based AI humanizer and detector for writers who need to revise AI-assisted drafts and check them against major detection tools.
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AI Undetectable suits solo writers and marketers who regularly produce AI-assisted drafts and want a single workspace to rewrite and spot-check them against detectors. API access is locked to the $31/month tier, which puts it behind more established humanizer tools for developers or agencies who need programmatic access at a lower price point. If your primary need is grammar, clarity, and tone rather than detection evasion, Grammarly covers that ground without the ethical complications.
What is AI Undetectable?
AI Undetectable helps writers and marketers revise existing AI-assisted drafts. Its browser workspace keeps the original and rewritten text side by side, with Basic and Stealth modes and options for general writing, essays, articles, marketing material, and stories. Full-length recorded examples are public so readers can inspect the original and two rewrites before signing up. Text and image AI-likelihood checks are included with plan-based access. Live tools require a 3-day trial followed by a paid subscription; monthly plans start at USD 9.99. Review factual claims and meaning before publishing. Detector scores are estimates, not proof of authorship. Submitted by the maker with AI assistance.
How we scored AI Undetectable
Capability lands at 16 because the core feature set (humanizer, detector, side-by-side view, five writing modes) is functional but not differentiated: API access is locked behind the $31/month tier, there is no bulk processing or non-expiring credits at self-serve levels, and the word caps (10K to 35K/month) are modest against competitors. Ease of use scores 18 because the browser workspace is straightforward, the side-by-side layout is a genuine usability advantage, and the 3-day trial lowers the barrier to evaluation. Value scores 16: the $9.99 entry tier is accessible, but the no-rollover credit policy and the API paywall at $31/month reduce practical value for anyone who does not use exactly their allotted words each month. Delivery scores 12 because no substantial independent user review corpus exists specifically for aiundetectable.com, the tool operates in an ethically contested space with real academic-integrity implications, and the money-back guarantee terms could not be fully verified from available sources.
Pros and cons
What we liked
- Side-by-side original and rewritten text view reduces the risk of accepting changes blindly, a workflow detail most competing humanizers skip.
- Money-back guarantee on humanized output that still gets flagged as AI-generated is a concrete commitment, not just a marketing claim.
- Annual billing at roughly 50% off monthly rates makes the entry tier ($5.00/mo for 10,000 words) one of the more affordable options in the humanizer category.
Where it falls short
- API access is gated to the $31/month (35K words) tier only; writers or developers who want programmatic integration at the $9.99 or $19.00 tiers are locked out entirely.
- Monthly word credits do not roll over, so a writer who processes 8,000 words one month and 12,000 the next loses the unused 2,000 from the lighter month with no credit toward the heavier one.
- The tool operates in an ethically contested space: its explicit purpose is to help content pass academic and editorial AI detectors, which creates real academic-integrity and editorial-trust risks that the site acknowledges only in a brief disclaimer.
Key features
AI Undetectable pricing
Three self-serve tiers: $9.99/month (10,000 words), $19.00/month (20,000 words), and $31.00/month (35,000 words). Annual billing cuts each price roughly in half: $5.00/mo, $9.50/mo, and $15.75/mo respectively. A Business tier with custom pricing is available for bulk or team needs. All plans start with a 3-day trial; monthly word credits do not roll over.
| Plan | Price | Who it is for |
|---|---|---|
| 10K words/month | $9.99/mo | 10,000 humanizer words per month, limited text detector access, limited image detector access, Basic and Stealth rewrite modes, five writing modes, five supported languages. Annual billing available at $5.00/mo (billed $60.00/year). 3-day trial before billing begins. |
| 20K words/month | $19.00/mo | 20,000 humanizer words per month, expanded text detector access, expanded image detector access, Basic and Stealth rewrite modes, five writing modes, five supported languages. Annual billing at $9.50/mo (billed $114.00/year). 3-day trial before billing begins. |
| 35K words/month | $31.00/mo | 35,000 humanizer words per month, unlimited text detector checks, unlimited image detector scans, Basic and Stealth rewrite modes, five writing modes and languages, API access, priority rewriting. Annual billing at $15.75/mo (billed $189.00/year). 3-day trial before billing begins. |
| Business | Contact for pricing | Bulk word credits, shared team workflows, higher-volume rewriting. Custom plan shaped around team needs. |
Pricing reflects what we saw at time of review (2026-09). Always confirm current pricing on the tool's own site.
Who should use AI Undetectable?
A solo content marketer or blogger who generates AI-assisted first drafts weekly and wants a quick pass through a humanizer before publishing will find the $9.99 or $19.00 monthly tier covers most practical needs. The side-by-side workspace and five writing modes make it easier to review what changed rather than just accepting a black-box rewrite. Writers who process under 20,000 words a month and want detector checks bundled in without paying separately for a standalone scanner get reasonable value here.
Anyone building a content pipeline that needs API access should look at the 35K tier minimum ($31/month) or budget for a Business quote, which makes this a poor fit for developers or small agencies watching costs. If your goal is improving writing quality, catching grammatical errors, or adjusting tone rather than evading AI detection, Grammarly is the better choice: it covers clarity, grammar, and generative rewriting across apps without the ethical and academic-integrity questions that come with humanizer tools.
Skip it if: Developers needing API access on a budget, or teams wanting shared workflows without a custom Business quote
AI Undetectable alternatives
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Frequently asked questions
Is there a free plan, or do I need a credit card to try it?+
There is no permanent free plan. AI Undetectable offers a 3-day trial that enables text detection, image detection, humanizing, and rewriting. Billing for the selected plan begins automatically after the trial unless you cancel.
What happens to unused words at the end of the month?+
Monthly humanizer word credits reset with each billing cycle and do not roll over. If you process 8,000 of your 10,000 allotted words in a given month, the remaining 2,000 are lost.
Which AI detectors does it target?+
The tool targets patterns measured by GPTZero, Turnitin, Originality.ai, Copyleaks, ZeroGPT, and Winston AI. The site notes that detector scores are probabilistic signals, not proof of authorship.
Can I get API access on the cheapest plan?+
No. API access is only available on the $31.00/month (35K words) tier and the Business plan. The $9.99 and $19.00 tiers do not include API access.
What is the money-back guarantee?+
If humanized output is still flagged as AI-generated, AI Undetectable promises to refund the cost of that humanization. The guarantee applies to the humanization service specifically, not the full subscription.
Does annual billing offer a meaningful discount?+
Yes. Annual billing cuts the monthly rate by roughly 50% across all three self-serve tiers: the 10K tier drops from $9.99 to $5.00/mo, the 20K tier from $19.00 to $9.50/mo, and the 35K tier from $31.00 to $15.75/mo.
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