HumanFlow vs AI Humanize

AI Humanize is among the cheapest per word here — 15,000 words at $6 a month billed annually, about $0.0004 a word — and its entry plan caps every request at 500 words, which is a third of what our free plan passes in one go. Cheap, and metered in a way that matters if your documents are long.

Figures read from AI Humanize's own pricing page on 16 August 2026 · check both pricing pages before deciding

Last reviewed 16 August 2026 · The HumanFlow team

HumanFlow and AI Humanize entry plans compared on price, allowance and features
	HumanFlow	AI Humanize
Entry price	$18 / mo · $10.80 on yearly	$15 / mo · $6 on yearly
Entry allowance	25,000 humanizer words / mo	15,000 words a month
Per request	5,000 words	500 words
Free tier	2,000 words / mo · 1,500 in one scan	None stated on their pricing page · Not applicable — no free tier stated per request
Detection	Yes — three-way verdict with its signals, 10,000 words/mo free. Sentence map on paid plans	Yes — metered by day: 30 checks on Basic, 100 on Pro, unlimited on their top tier
Tones / modes	3 tones — natural, casual and professional. No custom voice	"All rewrite styles" on every plan; the number is not stated
Extension / app	None — one web editor. iOS app in development	Not stated on the pricing page
Public API	Private beta — no public endpoint	An API link appears in their navigation; no terms are stated on the pricing page
Languages	English only	Not stated for rewriting. Their site interface offers 20+ languages, which is a different thing

Not stated on their page: Rewriting language support. Their interface offers 20-plus languages, which says nothing about what the rewriter handles, and the pricing page does not say.; Whether a free trial exists anywhere on the site. The pricing page shows none.; API terms. The navigation links an API; the pricing page states no limits or price for it.. Left open rather than estimated.

Where AI Humanize is the better buy

A much lower price per word than ours. Basic is 15,000 words at $6 a month billed annually, against our 25,000 at $18 — roughly a third of our cost per word, though several tools in this set go lower still.
Both billing states published beside each other on every tier, monthly and annual, which more than half this category does not do.
An unmetered tier at $20 a month billed annually, where our largest single-seat plan stops at 80,000 words.
Unlimited words per request from their second tier up. Ours are capped on every plan.
A private rewriting model per account, per their pricing page, which nothing else in this comparison advertises.

This section comes first on purpose. A comparison written by one of the two products is worth reading only if it is willing to lose.

Where HumanFlow is the better buy

A bigger single pass at entry. Their Basic plan caps each request at 500 words; our free plan takes 1,500 in one go and our paid plans take considerably more.
A free tier at all. Theirs starts at the paid plans, so there is no way to judge the output before paying.
Detection metered by words rather than by daily checks, so a long document is not three of your thirty daily allowances.
We publish what our detector cannot establish. Theirs is a daily count with no accuracy statement.

The request cap is the number that decides this

Their Basic plan is 15,000 words a month for $6 billed annually, about $0.0004 a word. It also caps each request at 500 words, and their page states that plainly as the maximum text input per use.

Five hundred words is about a page and a half. A dissertation section, a long blog post or a full essay has to be cut into pieces, rewritten separately and stitched back together — and that stitching is exactly where register drifts and paragraphs stop agreeing with each other.

The cap disappears from their second tier up, where requests are unlimited. So the honest reading is that Basic is priced for short work and Pro at $10 a month billed annually is the plan for anything long. Compare against that one, not against the headline.

There is no free tier, and that matters more than it sounds

Their pricing page shows three paid plans and nothing free. Every other tool in this comparison lets you put a paragraph through before paying something, and rewriting quality is the kind of thing you can only judge by looking at your own text after it has been through.

That is the practical argument for our free plan, and it is a narrow one: 2,000 words a month at 1,500 words a pass, which is enough to run a real essay and decide.

It cuts the other way on price. If you already know you want a rewriter and volume is what you are buying, paying $6 a month for 15,000 words is a better deal than anything we offer, and a free tier you no longer need is not worth $12 a month.

What we are not going to claim about their languages

Their site offers its interface in more than twenty languages, including Chinese, Spanish, French, German, Japanese, Korean, Russian, Portuguese, Hindi, Arabic and Bengali. It would be easy to write that down as language support and let a reader assume the rewriter handles all of them.

It does not follow. A translated interface tells you who the site is marketed to, not what the model does with a paragraph of Bengali. Their pricing page does not state rewriting language support, so we have recorded it as an open question rather than crediting or discrediting them.

Ours is English only, which we do state. If you write in another language, ask them directly before buying — and the same caution applies to any tool in this category that lists languages in a footer rather than in its product documentation.

The claim we won't compare on

Which tool is better at getting past a detector. There is no reproducible public benchmark for it, detectors disagree with each other on identical text, and every vendor publishing such a number is grading its own homework — us included.

What AI Humanize claims: We found no bypass rate, undetectability guarantee or named detector on their pricing page. They describe themselves as a student-led team of graduate students and PhD candidates specialising in algorithms, and sell a rewriting model rather than an outcome.

Everything above is a figure you can open their pricing page and check. That is the whole standard. Why detection scores are unreliable in the first place, and how we handle competing in the market we write about.

Which should you pick?

Pick AI Humanize if Cost per word is the deciding factor and your documents are short, or you want unlimited monthly volume for $20 a month and can live without a free tier to test first.

Pick HumanFlow if You work on long documents and the 500-word request cap at entry would bite, or you want to try the output before paying anything.

One caveat that applies whichever you choose: HumanFlow is the newer product here. It runs in any browser, with an iOS app in development, and the competitors on this page have had longer to accumulate integrations and export options. If you need a specific one of those today, that is a real reason to choose them.

The test that settles it costs nothing.

A 300-word preview, no account needed. HumanFlow does not promise to beat any detector — nobody honestly can — so the only useful test is whether the output reads like you. Free plan takes 1,500 words a scan.

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Quick answers

Is AI Humanize cheaper than HumanFlow?

Substantially. Their Basic plan is 15,000 words at $6 a month billed annually against our 25,000 at $18, which is roughly a third of our cost per word. Their unmetered tier at $20 billed annually has no equivalent here at all.

What is the catch with the cheapest plan?

A 500-word cap on every request, stated on their page as the maximum input per use. Anything longer has to be split and rejoined, which is where documents lose consistency. The cap is removed from their second tier upward.

Does AI Humanize have a free trial?

Their pricing page shows none — three paid plans and no free tier. We have recorded that as what the page states rather than as a claim about the whole site, and it is worth checking directly if trying before paying matters to you.

Does AI Humanize claim to beat AI detectors?

Not on the pricing page we read. There is no bypass rate, no undetectability guarantee and no named detector on it, which puts them in a better position than several tools in this comparison.

Sources

AI Humanize pricing page — read 16 August 2026

Other comparisons

vs Undetectable.ai vs WriteHuman vs Humbot vs BypassGPT vs HIX Bypass vs QuillBot vs Grammarly vs StealthWriter vs Ryne vs GPTHuman vs Phrasly vs Walter Writes vs GPTinf vs Netus AI vs Twixify vs Humanize AI Pro

Also useful: the free AI detector, what people use this for and the free writing tools. Before buying anything in this category, ours included, what a humanizer cannot do is the list of seven things no rewriting tool fixes, and editing it yourself is usually the better result if you have the hour.