WriteHumane vs Undetectable AI (2026): Honest Comparison

Undetectable AI is one of the best-known names in AI humanizing, and WriteHumane is a newer, simpler alternative. Both rewrite AI-drafted text to read more naturally. Here is how they compare on the things you can verify, based on public pricing and feature pages in September 2026.

Pricing and limits

Undetectable AI uses monthly word allowances. Plans start at $9.99 a month for 10,000 words and rise through 20,000 and 35,000 words to $42.50 a month for 50,000 words, with roughly half-price rates on annual billing. There is a 250-word free trial and a business tier with custom pricing.

WriteHumane uses daily allowances instead: $15 a month for 10,000 words a day, $49 for six months with 20,000 words a day, or $89 a year with 50,000 words a day, after a free one-time 1,000-word trial. For someone who writes steadily every day, a daily allowance works out to far more words per month than an equivalent monthly cap. For someone who needs a few thousand words once in a while, Undetectable AI's entry plan may be cheaper.

Features

Undetectable AI offers a broad toolkit around its humanizer, including an AI detector, API access on its plans, and extra products aimed at writers and job seekers. It also advertises a money-back guarantee tied to its output being flagged; read the conditions carefully before relying on it.

WriteHumane is deliberately narrower: one humanizer with five modes and four tones, an estimated AI score before and after each rewrite, and free tools (AI detector, readability checker, word counter) that work without an account. Signed-in users get a private history they can delete.

Ease of use

Both work in the browser without installation. WriteHumane's interface is built around a single paste-choose-rewrite flow; Undetectable AI offers more settings and products, which suits power users but takes longer to learn.

Which is right for you?

Pick Undetectable AI if you need an API, business features or occasional low-volume use on its cheapest plan. Pick WriteHumane if you write regularly, want simple controls for tone and register, and prefer daily limits over a monthly cap. Run the same paragraph through both before committing.

What neither tool can promise

No humanizer can guarantee how a specific detector will score your text, because detectors update their models and results vary with the input. Use these tools to improve how your writing reads, follow any AI policy that applies to you, and review every output before you publish or submit it.