AI detector market forecast, November 2026

AI detector forecast: the key numbers for November 2026

• Expected in November49Mvisits+2% vs October
• Likely range44M–54Mvisits in November
• Expected in May 202749Mvisits+2% six months out
• Forecasts in range4 of 6monthswhen the method was tested

• The AI detector sites RankDude tracks got 47,984,174 visits from Google search in October 2026.
• The forecast for November 2026 is 49,093,282 visits, about the same as October 2026, likely between 44M and 54M.
• That is down on November 2025, when the same sites had 55,776,273 visits.

In plain words: Tested on the last 6 months, it missed by 6.2% on average.

Tested on

the last 6 months, as if their numbers were unknown

Average miss

6.2%

Inside the range

4 of 6 months

Direction called right

2 of 6 months

Next month

this section scores the real forecast

The backtest, month by month

Each row uses only data from before that month.

Miles explains

4 of 6 in range is honest, not perfect. The biggest miss was October 2026 (-14%), the kind of month when one big site jumps. That’s why the range is wide.

Visits are down on a year ago (-6%), and the last three months were lower than the three before. Name searches are down (-27% since October 2025). Recent months are getting weaker; the forecast expects November 2026 to be about the same as October 2026.

Visits, October 2026

47,984,174 (-13.6% on the month before, -5.6% on a year ago)

Last 3 months vs the 3 before

-14.2%

24-month peak

67,215,209 in February 2026

Name searches, US

-26.7% since October 2025

Google Trends, "ai detector"

79/100 (-16.8% on a year ago)

12-month trend

-1.3% a month; the forecast carries the level of recent months, not the slope

Miles explains

Big green or red bars are usually one site winning or losing a Google ranking, not the whole market moving. What I watch is the last three months against the three before: -14%.

November is usually a bigger month than average (22% above) for searches for “ai detector”. But the sites’ visits follow rankings more than the calendar, so the pattern is shown and not allowed to move the numbers.

November index

122 (100 = an average month)

On the calendar

Black Friday and Cyber Monday and Thanksgiving (US)

Biggest months

March, April, September, October and November

Quietest months

January, June, July, August and December

Used in this forecast?

No: average miss 6.2% as chosen, 6.2% without the pattern, 25.8% always with it

Miles explains

I tested the calendar against the last months and it made the forecast worse (25.8% average miss with it, 6.2% without), so I show it but leave it out.

About 49M visits in November 2026, about the same as October 2026. The likely range is 44M to 54M.

Source: DataForSEO and Google Ads.

By May 2027 the forecast expects about 49,093,282 visits a month, +2% on the 47,984,174 of October 2026, so the next six months look flat.

The forecast expects ZeroGPT (+5%), GPTZero (+7%), Clever AI Detector (+5%) and WriteHuman (+4%) to rise, and Undetectable AI (-7%) and Decopy AI Detector (-3%) to fall; the rest are within 3% of October 2026. Single sites are harder to forecast than the whole market, so their ranges are wider.

Site-level forecasts for November 2026

Site	October 2026	November 2026 forecast	Range	Change
Grammarly	21,845,704	21,514,591	19M to 24M	-1.5%
ZeroGPT	10,113,046	10,629,974	9.8M to 11M	+5.1%
GPTZero	6,889,183	7,369,394	6.8M to 8.0M	+7.0%
Clever AI Detector	2,008,651	2,102,430	1.3M to 2.9M	+4.7%
Turnitin	1,307,200	1,299,248	1.1M to 1.5M	-0.6%
Sapling	1,027,702	1,028,089	905K to 1.2M	0%
Originality.ai	1,014,712	1,015,267	855K to 1.2M	+0.1%
Undetectable AI	492,126	456,960	347K to 567K	-7.1%
WriteHuman	451,461	470,027	376K to 564K	+4.1%
Decopy AI Detector	419,298	406,340	338K to 474K	-3.1%

Site

• Grammarly

  October 2026

  21,845,704

  November 2026 forecast

  21,514,591

  Range

  19M to 24M

  Change

  -1.5%

• ZeroGPT

  October 2026

  10,113,046

  November 2026 forecast

  10,629,974

  Range

  9.8M to 11M

  Change

  +5.1%

• GPTZero

  October 2026

  6,889,183

  November 2026 forecast

  7,369,394

  Range

  6.8M to 8.0M

  Change

  +7.0%

• Clever AI Detector

  October 2026

  2,008,651

  November 2026 forecast

  2,102,430

  Range

  1.3M to 2.9M

  Change

  +4.7%

• Turnitin

  October 2026

  1,307,200

  November 2026 forecast

  1,299,248

  Range

  1.1M to 1.5M

  Change

  -0.6%

• Sapling

  October 2026

  1,027,702

  November 2026 forecast

  1,028,089

  Range

  905K to 1.2M

  Change

  0%

• Originality.ai

  October 2026

  1,014,712

  November 2026 forecast

  1,015,267

  Range

  855K to 1.2M

  Change

  +0.1%

• Undetectable AI

  October 2026

  492,126

  November 2026 forecast

  456,960

  Range

  347K to 567K

  Change

  -7.1%

• WriteHuman

  October 2026

  451,461

  November 2026 forecast

  470,027

  Range

  376K to 564K

  Change

  +4.1%

• Decopy AI Detector

  October 2026

  419,298

  November 2026 forecast

  406,340

  Range

  338K to 474K

  Change

  -3.1%

Source: DataForSEO.

Together the ten come to 46,292,320, inside the market forecast of 49,093,282 for every tracked site.

Miles explains

GPTZero has the biggest expected rise (+7%). Single sites are much harder to call than the whole market, so read these as direction, not promises.

What could knock November 2026 off course:

• A big site winning or losing a page-one position for “ai detector”.
• A Google update.
• A site going offline.
• A news story that spikes interest for a week and then fades.

None of these are in the numbers until they happen, which is why the range exists.