RankDude
Updated 11/02/2026 · next update 12/01/2026

AI Plagiarism Checker Industry Report, October 2026

Miles FosterOwner and tester, RankDude

The market▼ Shrinking

Visits, year on year
-37%
Visits, last six months
-35%
Name searches vs October 2025
-32%

Every key number on the AI plagiarism checker market for October 2026, dated and sourced, so you can quote it. The 22 sites I measure got about 34 million visits from Google, 37% fewer than a year ago, and the five most-visited sites took 89.4% of them.

Below: every figure in one table, the most-visited sites, who grew and who shrank and what I expect for November 2026.

Published 2 November 2026. Data from DataForSEO, Tranco and Ahrefs · free to quote with a link · not a ranking

AI plagiarism checker industry report: the key numbers for October 2026

Four numbers for October 2026. Visits mean visits from Google search to the 22 tracked sites. Tap one for the detail below.

1Every figure in one table

Measure

  • Search visits a month, all tracked sites, worldwide
    Value
    34,270,367
    Period and basis
    October 2026; -37.0% year on year, -11.3% month on month
  • Search visits a month, United States
    Value
    6,366,576
    Period and basis
    October 2026; -17.0% year on year
  • US share of worldwide search visits
    Value
    18.6%
    Period and basis
    October 2026
  • Brand-name searches a month, US, all counted brands
    Value
    3,325,080
    Period and basis
    September 2026; -31.6% against October 2025
  • Brand-name searches a month, worldwide
    Value
    8,435,260
    Period and basis
    September 2026; -29.4% against October 2025
  • Searches a month for “ai plagiarism checker”, US
    Value
    9,900
    Period and basis
    Google Ads, 12-month average
  • Searches a month for “ai plagiarism checker”, worldwide
    Value
    49,500
    Period and basis
    Google Ads, 12-month average
  • Referring domains, all tracked sites
    Value
    364,856
    Period and basis
    October 2026; first reading, no year-on-year figure yet
  • Share of worldwide visits held by the five most-visited sites
    Value
    89.4%
    Period and basis
    October 2026
  • Share held by the ten most-visited sites
    Value
    97.5%
    Period and basis
    October 2026
  • Tracked sites on Google's first page for “ai plagiarism checker”, US
    Value
    1
    Period and basis
    October 2026; positions 1 to 10
  • Tracked sites ranking anywhere for “ai plagiarism checker”, US
    Value
    1
    Period and basis
    October 2026; any position checked

2How many people visited

In plain words: These sites got fewer visits from Google than a year ago (-37%), and October 2026 was a weaker month than September 2026 (-11%). Grammarly alone takes 63.7% of the visits, so the totals mostly follow it. Without it, visits would be down 47.9% on a year ago instead of down 37.0%.

WorldVisits a month to AI plagiarism checker sites, worldwide

025M50M75M100MNov 24Jan 25Mar 25May 25Jul 25Sep 25Nov 25Jan 26Mar 26May 26Jul 26Oct 2634M
Low 32MHigh 64MAverage 50M
Hover, tap, or use the arrow keys to inspect a month

Source: DataForSEO, Google search visits, all tracked sites.

Miles explains

Judge this line on the year, not the last dot: visits are 37% below a year ago, and 46% below the December 2024 high. One site winning or losing a ranking can swing a single month a lot.

3How many people went looking

People typed a site’s name into Google 32% less often than in October 2025 (-32%). That is the loyalty number: nobody types a name by accident.

USSearches a month for the site names, United States

01.3M2.5M3.8M5.0MOct 25Dec 25Feb 26Apr 26Jun 26Sep 263.3M
Low 1.4MHigh 4.9MAverage 3.2M
Hover, tap, or use the arrow keys to inspect a month

US searches a month for the counted brand names, summed. Google Ads data via DataForSEO, to September 2026.

Miles explains

Name searches are the number I trust most. They are down 32%, and nobody types a site’s name by accident, so this shows fewer people coming back on purpose.

4Where the visitors live

About 19 of every 100 visits come from the United States. Outside the US I measure 7 countries one by one; the largest is India.

USShare of visits that come from the US (%)

05101520Nov 24Jan 25Mar 25May 25Jul 25Sep 25Nov 25Jan 26Mar 26May 26Jul 26Oct 2618.6
Low 9.2High 18.6Average 15
Hover, tap, or use the arrow keys to inspect a month

US share of worldwide search visits, month by month.

Country

  • India
    Search visits a month
    5,821,049
    Share of the measured countries
    68.3%
  • United Kingdom
    Search visits a month
    992,075
    Share of the measured countries
    11.6%
  • Canada
    Search visits a month
    836,939
    Share of the measured countries
    9.8%
  • Australia
    Search visits a month
    478,515
    Share of the measured countries
    5.6%
  • France
    Search visits a month
    160,411
    Share of the measured countries
    1.9%
  • Brazil
    Search visits a month
    120,717
    Share of the measured countries
    1.4%
  • Germany
    Search visits a month
    114,685
    Share of the measured countries
    1.3%

Source: DataForSEO, October 2026.

Miles explains

The US is the biggest single market, but only about 19 in every 100 visits. India alone is 68.3% of the countries measured outside it.

5The most-visited sites

Grammarly gets the most visits, Grammarly is the name people search for most, and Grammarly holds Google’s first position for “ai plagiarism checker”. The five most-visited sites take 89.4% of all visits.

By worldwide search visits

By US brand-name searches

Miles explains

The five most-visited sites take 89.4% of all visits. When one of them gains or loses a big ranking, the whole market total moves with it.

6Who grew and who shrank

The fastest grower in a year was StrikePlagiarism (+31%); the steepest fall was at Plagium (-80%). Big swings are usually one site winning or losing one Google ranking.

Growing

Declining

  • Plagium
    A year ago
    103,357
    Now
    20,221
    Change
    -80%
  • Smodin
    A year ago
    819,550
    Now
    191,309
    Change
    -77%
  • iThenticate
    A year ago
    132,828
    Now
    31,851
    Change
    -76%
  • Plagly
    A year ago
    34,648
    Now
    11,292
    Change
    -67%
  • Ahrefs
    A year ago
    5,325,924
    Now
    1,879,377
    Change
    -65%
  • Prepostseo
    A year ago
    1,509,757
    Now
    538,908
    Change
    -64%
  • PlagiarismCheck.org
    A year ago
    273,513
    Now
    111,901
    Change
    -59%
  • BrandWell
    A year ago
    40,731
    Now
    17,529
    Change
    -57%

Worldwide search visits, October 2026 against a year earlier; sites with at least 5,000 visits a year ago.

To cite this report: RankDude, “AI Plagiarism Checker Industry Report, October 2026”, published 2 November 2026, https://rankdude.ai/statistics/ai-plagiarism-checker/industry-report. Figures are estimates from the sources named beside them.