Undetectable AI review

Undetectable AI pairs a humanizer with a detector and lets you steer each rewrite by readability level, such as university, high school or journalist, and by purpose, such as essay, story or marketing material. Those controls are useful when the same AI draft must read differently for a newsletter and a report. The entry plan costs $5.00 per month charged annually at $60, or $9.99 monthly, for 10,000 words a month, and higher tiers raise the pool to 20,000, 35,000 and 50,000 words. Every plan includes unlimited AI detection, writing level matching, API compatibility and a human auto typer. The company promises to refund the cost of humanization if output is flagged as not human. There is no permanent free plan: the free trial stops at 250 words. Its marketing leans heavily on beating detectors, so writers who care mainly about style may prefer Grammarly or Wordtune.

Who it is for

Writers who want rewrites tuned to a reading level and a low annual price.

Price

Free trial of 250 words; from $5.00 per month billed annually ($60 a year) or $9.99 monthly.

$ 9.99 $ 5.00 /mo 10K words/month Charged annually $60.00
Quoted from the vendor pricing page on November 11, 2026.

Key features

• Readability settings such as university, high school and journalist
• Purpose settings such as essay, story and marketing material
• Unlimited AI detecting on every plan
• Writing level matching and API access
• Refund of the humanization cost if output is flagged as not human

Strengths and weaknesses

• Strength: Low annual entry price of $5.00 a month
• Strength: Readability and purpose controls shape the tone
• Strength: Unlimited AI detection on paid plans
• Weakness: No permanent free plan, only a 250-word trial
• Weakness: Marketing centers on passing detectors rather than style
• Weakness: Words expire monthly unless you buy business credits

Key facts

• Free option: Trial limited to 250 words
• Entry plan: 10,000 words a month
• Refund policy: Cost of humanization refunded if flagged

Where it ranks

Undetectable AI is No. 6 in our Best AI Humanizers verdict.