Simple pricing.
No surprises.
Three plans. No hidden fees. No per-word surcharges. Every plan runs the same engine, checks against all 7 detectors, and uses the multi-pass correction loop. Pro adds Brand Voice training, side-by-side compare, 8,000-word inputs, and API access.
forever
- ✓ 200 humanizer words a day
- ✓ 200 detector words a day
- ✓ No signup, no credit card
- ✓ Subtle, Natural, Strong tones
- ✓ 7-detector check, built in
- ✓ Multi-pass detector loop
- ✓ Up to 1,500 words per run
per month
- ✓ 50,000 humanizer words a month
- ✓ Up to 8,000 words per single run
- ✓ Brand Voice training
- ✓ Side-by-side compare
- ✓ Two-model 2nd-opinion pass
- ✓ Searchable run history + API access
- ✓ 7-day refund, cancel in one click
one-time payment
- ✓ Unlimited humanizer words, for life
- ✓ Up to 12,000 words per single run
- ✓ Premium model tier (Gemini Pro + Claude)
- ✓ Everything in Pro included
- ✓ Every future feature, free
- ✓ ★ Permanent Founder badge
- ⚡ Capped at 100 seats, ever
Same engine, capped by volume.
Free, Pro, and Founder all run the exact same humanizer engine. Same three tone strengths (Subtle, Natural, Strong). Same multi-pass detector loop. Same 7-detector check at the end of every run. Same 99.6% pass rate measured weekly.
What changes between tiers is volume and depth. Free is 200 words a day with 1,500-word max per run. Pro is 50,000 words a month with 8,000-word max per run, plus Brand Voice training, side-by-side compare, two-model second-opinion pass, searchable run history, and API access. Founder is unlimited words for life with 12,000-word max per run, plus the premium model tier (strongest Gemini model + Claude second-opinion pass) on every run.
We built it this way because making you pay to use the basic tool is annoying. 200 words is enough to humanize a full paragraph and see real detector scores. If it works for you at that scale, paying for more volume makes sense. If it doesn't, no harm done.
Cost per 1,000 words.
| Tool | Monthly cost | Words included | Cost per 1K words |
|---|---|---|---|
| HumanGPT Pro | $10 | 50,000 | $0.20 |
| HumanGPT Founder | $199 once | Unlimited | ~$0 effective |
| Undetectable.ai | $9.99 | 10,000 | $1.00 |
| StealthWriter | $14 | 10–15,000 | $0.93–$1.40 |
| Quillbot Premium | $9.95+ | Unlimited paraphrase, 700-word cap per humanize | N/A (different product) |
| Manual rewriting | $50+/hr | ~1,000/hr | $50.00 |
Verified 2026-05-27 from each tool's public pricing page
The lowest-cost humanizer with API access and Brand Voice.
We don't claim to be the only humanizer worth using. We claim to be the one that costs the least, gives you the API for free, and lets you try it with no card and no email.
| Feature | HumanGPT Pro | Undetectable.ai | Quillbot Premium | StealthWriter |
|---|---|---|---|---|
| Price (monthly) | $10 | $9.99 | $9.95+ | $14 |
| Yearly equivalent | $80 ($6.67/mo) | $60 ($5.00/mo) | $50 ($4.17/mo) | varies |
| Lifetime option | $199 once (100 seats) | — | — | $397 |
| Words per month | 50,000 | 10,000 | Unlimited paraphrase | 10–15,000 |
| Max input per request | 8,000 words | Not disclosed | 700 words | 800 words |
| Two-model 2nd-opinion pass | — | — | — | |
| Brand Voice training | — | — | — | |
| Side-by-side compare | — | — | — | |
| Built-in 7-detector check | 3 detectors | — | — | |
| REST API access | — | — | ||
| Searchable run history | — | — | — | |
| 7-day refund, no questions | Conditional (flagged-output only) | Not stated | Not stated | |
| No signup to try | Email required | Email required | Email required |
- HumanGPT
- $10
- Undetectable.ai
- $9.99
- Quillbot
- $9.95+
- StealthWriter
- $14
- HumanGPT
- $80 ($6.67/mo)
- Undetectable.ai
- $60 ($5.00/mo)
- Quillbot
- $50 ($4.17/mo)
- StealthWriter
- varies
- HumanGPT
- $199 once (100 seats)
- Undetectable.ai
- —
- Quillbot
- —
- StealthWriter
- $397
- HumanGPT
- 50,000
- Undetectable.ai
- 10,000
- Quillbot
- Unlimited paraphrase
- StealthWriter
- 10–15,000
- HumanGPT
- 8,000 words
- Undetectable.ai
- Not disclosed
- Quillbot
- 700 words
- StealthWriter
- 800 words
- HumanGPT
- Undetectable.ai
- —
- Quillbot
- —
- StealthWriter
- —
- HumanGPT
- Undetectable.ai
- —
- Quillbot
- —
- StealthWriter
- —
- HumanGPT
- Undetectable.ai
- —
- Quillbot
- —
- StealthWriter
- —
- HumanGPT
- Undetectable.ai
- 3 detectors
- Quillbot
- —
- StealthWriter
- —
- HumanGPT
- Undetectable.ai
- Quillbot
- —
- StealthWriter
- —
- HumanGPT
- Undetectable.ai
- —
- Quillbot
- —
- StealthWriter
- —
- HumanGPT
- Undetectable.ai
- Conditional (flagged-output only)
- Quillbot
- Not stated
- StealthWriter
- Not stated
- HumanGPT
- Undetectable.ai
- Email required
- Quillbot
- Email required
- StealthWriter
- Email required
Prices and features verified 2026-05-27 from each competitor's public pricing page. Refreshed monthly.
Try HumanGPT Pro · $10/moPricing FAQ.
No fine print.
Yes. 200 humanizer words per day, no signup, no credit card. Just paste text and humanize. The free tier runs the exact same engine as Pro: three tone strengths (Subtle, Natural, Strong), the multi-pass detector loop, and the 7-detector consensus check. The only limits are 200 words a day and 1,500 words per single run.
Input words. If you paste 150 words, that's 150 words from your daily or monthly quota. The output might be slightly longer or shorter depending on the humanization mode, but only input words are counted.
Yes. No contracts, no cancellation fees. Cancel through your dashboard or email us. Your access continues until the end of the billing period.
They don't. Lifetime includes unlimited humanizer words for life. The same per-day rate-limit applies that applies to every plan (anti-abuse), but there's no monthly or lifetime word ceiling on the Lifetime plan.
The free tier is designed for student budgets. 200 words/day covers most homework paragraphs. For full essays, Pro at $10/month is less than a coffee per week.
Not yet. Pro accounts work well for small teams. For enterprise needs (API access, volume pricing, dedicated support), email us at [email protected].
Credit/debit cards and major digital wallets. All payments are processed securely through our payment provider. We don't store your card details.
Yes. The Founders Edition Lifetime plan is capped at 100 total seats ever. Once they're gone, the only options are Free and Pro. We won't create another lifetime tier.
Free to try. $10/mo to scale. $199 to never think about it again. Every plan includes every feature.
Try free now