A cheaper alternative to Undetectable.ai — without the trade-off you'd expect

Here's the side-by-side, normalized to per-1,000-words because that's the unit most users measure in.

Honest caveat on the entry tier.If your monthly need is genuinely under 5,000 words, HumanWriteup's Basic is the cheapest totaloption at $5.99/mo. But Undetectable.ai doesn't sell a sub-20K plan, so their cheapest paid tier carries a lower per-1,000-wordscost ($0.95 vs $1.20) because you're forced into more capacity than you might use. At Pro and Power-user tiers the gap reverses and HumanWriteup is cheaper both per-month and per-1k.

Two things to notice in the rest of the table. First, at the Pro and Power-user tiers HumanWriteup is roughly 37% cheaper per month at comparable capacity. Second, our yearly Pro plan at $0.40 per 1,000 words is the actual cost most regular users pay — annual billing is half-price, and most people who try it once stay on it.

If you're writing one essay a month, the difference is a coffee. If you're a content team running 30,000 words a month, going HumanWriteup Ultra yearly vs Undetectable.ai's comparable 35K monthly plan saves roughly $250 a year for the same output quality.

Same humanizer engine, trained against the same set of AI fingerprints. Same detector coverage — Turnitin, GPTZero, Originality.ai, Copyleaks. Same supported AI sources (ChatGPT, Claude, Gemini, anything you paste in). Same instant output, streamed live as the rewrite happens. Same data policy: your text isn't stored or used for training. Same compliance: GDPR, CCPA, PCI-DSS through Stripe.

You don't get a lower-tier model or a watered-down version. The free tier and every paid tier use the same humanizer.

What you don't get with us — and this is the honest part — is the bigger product surface area Undetectable.ai has built up over time. They've been at this longer, they have more secondary features (paraphrasing modes, multilingual support breadth, integrations), and their brand is more recognized in the category. If those things matter to your workflow, that's a real reason to stay with them. We're not pretending to be a one-to-one feature replica.

What we are is faster, cleaner, and cheaper for the thing people actually use a humanizer for: paste essay, get rewrite, pass detector, submit.

The fairest comparison is the one you run yourself. Here's how to do it in about ten minutes, without committing a card to either tool:

1. Pick an essay or article you've already written or drafted with AI. Something 500–1,000 words. Your real work, not a synthetic test.
2. Run the original through a detector like GPTZero or our free AI detector. Note the score.
3. Paste it into Undetectable.ai's free tier. Note the rewrite. Run the rewrite through the same detector. Note the new score.
4. Paste the same original into HumanWriteup's free tier at the homepage. Run that rewrite through the same detector. Note the new score.
5. Compare three things:the detector scores (similar? we expect so), the readability of the two rewrites (your call), and the price you'd pay each tool for the volume you actually need.

We've run this test internally across hundreds of essays. Detector pass rates are statistically comparable. Readability is roughly even at the sentence level, slightly in our favor at the paragraph level because our rewrites are less aggressive on sentence-boundary changes. Pricing is the lever that moves.

Three honest cases:

If you need their specific integrations.Undetectable.ai has plugged into a handful of enterprise workflows we haven't. If your team already runs a process around their API or their Chrome extension, the migration cost may outweigh the per-word savings.

If you've already paid for a year. No tool switch is worth eating a paid-up annual subscription. Use it out, then re-evaluate when renewal comes around.

If you write in a language we don't support as well.Both tools work best in English. Undetectable.ai has broader coverage for some non-English languages and dialects. If that's your use case, test both on your actual language before deciding.

For everyone else — students, marketers, content writers, researchers, freelancers — the price difference isn't doing any work for you. It's just costing you.

There's no migration to worry about because nothing is locked in — neither tool stores your documents server-side, and you're not exporting templates or models. The switch is just changing the URL you paste into.

Step 1. Sign up for HumanWriteup free. No card. You'll be on the 500-words-a-month free tier immediately.

Step 2.Run a few of your typical jobs through us for a week. Same workflow you're used to.

Step 3. If it works, cancel Undetectable.ai before your next renewal. Their cancellation flow is in account settings under Subscriptions.

Step 4. If you need more than the free tier, pick a HumanWriteup plan. Pro at $11.99/month is the most common pick — annual cuts it in half.

That's the whole migration. No data export, no API rewiring, no team onboarding.

Students — the Pro tier annual at $5.99/month effective is built for someone writing essays every few weeks. Full student writeup →

Marketers and content teams — Ultra at $19.99/month covers about 30,000 words, which lands somewhere between two long-form articles a week and four short ones. Yearly halves it.

Heavy users— if you're putting more than 30,000 words a month through any humanizer, talk to us about volume pricing. Cheaper than scaling tiers and cheaper than what you're paying Undetectable.ai at that volume.

This page is tightly focused on pricing. For the full output-quality and feature head-to-head, see our complete HumanWriteup vs Undetectable.ai comparison →