Independent product comparison · Updated September 2026
UltraHumanizer is the stronger free, editing-first choice for complete documents and precise control. Stealthly offers a simpler detector-led workflow with Light, Balanced, and Deep modes—but its free plan is limited to 80 words per request and 300 words per month, while its strongest bypass and originality statements remain vendor claims rather than independently reproducible evidence.
The 30-second answer
It keeps the workflow focused on readable, natural output while protecting the central meaning of your draft.
Try it free ↗Check the current official product page before paying because limits, pricing, and included features can change.
Visit Stealthly ↗Feature-by-feature
Public product information reviewed through September 3, 2026. We separate vendor claims from independently verified outcomes.
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| Feature |  UltraHumanizer | Stealthly |
|---|---|---|
| Free starting access | Completely free during early access | 300 words per month with an 80-word limit per request |
| Document size | Up to 12,000 words per document | 80 words free, 400 Basic, 1,000 Pro, or 2,000 Premium per request |
| Rewrite controls | Tone, output length, reading level, rewrite strength, and exact terms | Light, Balanced, and Deep processing modes |
| Revision workflow | Editable result, history, quick refinements, and visible source-versus-result changes | Paste, check, choose a mode, humanize, and review the returned text |
| Detection workflow | No built-in detector currently | AI-content detection is included in the product and plan descriptions |
| Evidence standard | Editorial controls and source comparison are visible in the current tool | Large user, training, pass-rate, detector-bypass, and originality statements are published as company claims |
| Privacy clarity | Uploads are processed for the requested result; sensitive details should still be removed | Policy describes account, device, usage, location, cookie, payment, analytics, advertising, and security processing; no text-specific retention period is stated |
| Paid pricing | No paid plan during current free early access | Monthly list prices shown: $17 Basic, $30 Pro, and $49 Premium; promotional and annual figures may differ |
| Refund and renewal | No subscription or card during early access | Auto-renewing subscriptions; first-purchase refund requests require three days and fewer than 1,000 words used |
| Best fit | Long-form, editing-first work with direct source review | Short passages where simple rewrite depth and an integrated estimate matter most |
Competitor details come from the public Stealthly product, pricing, privacy, terms, and refund pages. Product claims are described as claims, not guarantees. Verify current terms before choosing a plan.
Continue the research with our Stealthly review and shortlist of the best Stealthly alternatives.
Try the recommendation
You have the feature context—now paste a real draft and judge the writing itself. No account or credit card required.
Your humanized text will appear here.
How we compare
What can a new user do before creating an account or paying?
We compare input limits, controls, revision steps, and setup friction.
Detection, history, API access, and analysis matter for some workflows.
Official pages support feature facts; vendor performance claims are not treated as independent tests.
Decision scenarios
Disclosure: These are illustrative workflow scenarios, not customer testimonials or performance test results.
Needs one coherent workspace, exact-term protection, and visible source-versus-result changes across thousands of words.
Works in small sections and wants a quick Light, Balanced, or Deep choice beside an AI-content estimate.
Must preserve provenance, follow disclosure rules, and treat every detector score as uncertain rather than proof.
FAQs
UltraHumanizer is better for complete long documents, direct editorial controls, exact-term protection, and visible change review. Stealthly is better for short passages when three simple rewrite-depth choices and an integrated AI estimate fit the workflow.
Yes. Stealthly’s official pricing page currently lists a free plan with 300 words per month and up to 80 words per request. Product limits can change, so confirm the live editor.
The reviewed monthly pricing page lists Basic at $17 for 20,000 words, Pro at $30 for 50,000 words, and Premium at $49 for 300,000 words. Annual or promotional figures may be lower; verify the billing toggle and checkout total.
No. Stealthly is the product at stealthly.ai with Light, Balanced, and Deep modes. StealthWriter is a separate product at stealthwriter.ai with different models, limits, intensity controls, and revision features.
No independent comparison should guarantee how every current or future detector will classify a passage. Treat Stealthly’s performance statements as vendor claims and review facts, citations, voice, originality, and applicable disclosure rules yourself.
Your own draft is the most useful test