Brandwave

StealthWriter vs Undetectable AI:Which is more popular?

In September 2026, StealthWriter had more branded searches than Undetectable AI among AI humanizer tools worldwide. StealthWriter had about 135,000 branded searches, while Undetectable AI had 15,000. StealthWriter made up 18.5% of all AI humanizer tool searches we track, and Undetectable AI accounted for 2.1%. When we asked ChatGPT and Google AI Overviews about AI humanizer tools, Undetectable AI appeared in three of the five answers and StealthWriter in none.

Among AI humanizer tools worldwide in September 2026

Who do people search for more?

StealthWriter, about 9 searches for every 1 for Undetectable AI

StealthWriter 135K searchesUndetectable AI 15K searches

Who does AI mention more?

Undetectable AI, mentioned in 3 of 5 answers, StealthWriter in 0

Undetectable AI in 3 of 5StealthWriter in 0 of 5

Who does AI recommend more?

Undetectable AI, the only one of the two named

Undetectable AI first in 3StealthWriter never named

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Top AI humanizer tools in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, Undetectable AI was mentioned in three out of five: in all three ChatGPT answers, but not in either of the two Google AI Overviews. StealthWriter did not appear in any of the five answers.

Most recommended by AI

Brands get a higher ranking if they are mentioned earlier in the answers.

  1. QuillBot1st
  2. Undetectable AI2nd
  3. WriteHuman3rd
  4. Humanize AI Pro4th
  5. BypassGPT5th
  6. HIX Bypass5th
  7. Walter Writes7th
  8. Humbot–
  9. StealthWriter–
  10. Grubby AI–
  11. +1 more

Mentioned by AI

Each dot is one answer, filled in when that answer mentions the brand.

  • QuillBot5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • WriteHuman3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Undetectable AI3 of 5Named in 3 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • HIX Bypass2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • BypassGPT1 of 5Named in 0 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Walter Writes1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Humanize AI Pro1 of 5Named in 0 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Humbot0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • StealthWriter0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Grubby AI0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers

+1 more

See every answer about AI humanizer tools

5 answers

Not named in any answer:

Brands are shown in the order each answer named them. The survey took place in the United States on October 22, 2026.

Is StealthWriter or Undetectable AI more popular in search?

This chart shows how often people search Google for StealthWriter and Undetectable AI by name. Each line represents a brand's share of searches for all 11 AI humanizer tools we track, month by month, from English-language searches worldwide.

StealthWriter and Undetectable AI among AI humanizer tools worldwide, by month

Share of searches by month for StealthWriter, Undetectable AI. The figures are in the table below the chart.

View monthly share of searches table
MonthHumbotStealthWriterGrubby AIBypassGPTQuillBotPhraslyWriteHumanHIX BypassUndetectable AIWalter WritesHumanize AI Pro
Oct 202517.8%14.6%6.6%32.6%9%1.3%5.4%9.8%1.2%1.3%0.39%
Nov 202516.6%16.6%16.6%24.8%7.4%1.2%5%9.1%1.1%1.5%0.3%
Dec 202521.2%17.4%11.6%21.2%8.5%1.3%5.2%9.5%1.7%1.9%0.38%
Jan 202623.5%19.3%10.6%19.3%7.9%1.4%4.7%7.1%3.5%2.1%0.42%
Feb 202620.1%16.5%9.1%9.1%25.1%1.5%4.1%4.1%8.4%1.8%0.36%
Mar 202619.9%19.9%10.9%10.9%22.3%1.8%4%4%3.6%2.2%0.36%
Apr 202617.3%21.2%14.2%11.6%9.9%2.9%4.3%4.3%2.6%2.3%9.5%
May 202616.4%16.4%11%11%30.6%2.7%3.3%4%2.4%1.8%0.44%
Jun 202617.7%11.9%6.5%6.5%43.9%2.4%2.9%3.6%3%1.3%0.39%
Jul 202617.2%11.5%5.2%5.2%43.5%1.9%2.3%2.3%9.7%1%0.3%
Aug 202616%10.7%5.9%8.8%48.4%2.2%2.6%2.2%2%0.96%0.35%
Sep 202627.5%18.5%15.1%12.4%9.8%4.5%4.5%3%2.1%2%0.6%

How has the StealthWriter and Undetectable AI comparison changed over the last 12 months?

3 findings

How did search popularity change for AI humanizer tools worldwide in September 2026?

2 changes

  1. In September 2026, StealthWriter overtook QuillBot to rank 2nd among AI humanizer tools worldwide, with 18.5% of the searches.

  2. Estimated monthly branded searches for Undetectable AI worldwide fell 10.2% over 12 measured months, from 16.7K to 15K in September 2026.

How are branded searches counted?

3 search terms

Brandwave collects information about searches that people make online using StealthWriter’s and Undetectable AI’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.

StealthWriter

1 branded search term

  • stealthwriter

Undetectable AI

2 branded search terms

  • undetectable ai detector
  • undetectable ai humanizer

How the Brand Demand Index is measured

Other head-to-heads among AI humanizer tools

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