Brandwave

AI content detectors:Which brands are most popular in search?

In August 2026, Turnitin was the most searched among AI content detectors worldwide, with an estimated 1.5M branded searches and 55.5% estimated Share of Search within this set. These are worldwide searches for English-language branded terms.

Share of Search, August 2026
  1. Turnitin55.5%
  2. GPTZero37%
  3. Copyleaks7.4%
  4. Winston AI0.06%
  5. Originality.ai0.05%

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Share of SearchLeaderboard

Compare the tools that detect AI written text. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time.

Share of Search among AI content detectors worldwide, by month

Share of Search by month for Turnitin, GPTZero, Copyleaks. The figures are in the table below the chart.

View monthly share of search table
MonthTurnitinGPTZeroCopyleaksWinston AIOriginality.ai
Oct 202556.2%37.5%6.2%0.07%0.05%
Nov 202561%33.3%5.5%0.07%0.05%
Dec 202556.8%38%5.1%0.07%0.07%
Jan 202656.2%37.5%6.2%0.09%0.07%
Feb 202655.4%36.9%7.5%0.11%0.07%
Mar 202651.2%41.8%6.9%0.08%0.07%
Apr 202655.4%37%7.4%0.07%0.06%
May 202660.3%33%6.6%0.06%0.05%
Jun 202664.2%28.7%7%0.05%0.05%
Jul 202659.4%32.6%8%0.06%0.06%
Aug 202655.5%37%7.4%0.06%0.05%
Sep 2026—————

This month’s ranking, August 2026

  1. 1.Turnitin

    55.5%

    Held 1st. 1.5M estimated branded searches, 0% vs prior month. Share -3.9 points.

  2. 2.GPTZero

    37%

    Held 2nd. 1M estimated branded searches, +21.5% vs prior month. Share +4.4 points.

  3. 3.Copyleaks

    7.4%

    Held 3rd. 201K estimated branded searches, 0% vs prior month. Share -0.5 points.

  4. 4.Winston AI

    0.06%

    Moved from 5th to 4th. 1.6K estimated branded searches, 0% vs prior month. Share 0 points.

  5. 5.Originality.ai

    0.05%

    Moved from 4th to 5th. 1.3K estimated branded searches, -18.8% vs prior month. Share 0 points.

Compare search popularity between leading brands

Which brand is most popular in search among AI content detectors worldwide?

In August 2026, Turnitin was the most searched among AI content detectors worldwide, with an estimated 1.5M branded searches and 55.5% estimated Share of Search within this set. GPTZero is in 2nd place, 18.5 percentage points behind at 37% Share of Search.

Global AI content detectors, last 12 months ending September 2026
BrandShare of SearchPeakLowRank
Turnitin56.2% → 55.5%64.2%Jun 202651.2%Mar 20261st
GPTZero37.5% → 37%41.8%Mar 202628.7%Jun 20262nd
Copyleaks6.2% → 7.4%8%Jul 20265.1%Dec 20253rd
Winston AI0.07% → 0.06%0.11%Feb 20260.05%Jun 20264th
Originality.ai0.05%0.07%Jan 20260.05%Jun 20265th

Each finding as a sentence

  • Across the 11 months ending August 2026, Turnitin’s estimated Share of Search among AI content detectors worldwide decreased from 56.2% to 55.5%.
  • Across the 11 months ending August 2026, GPTZero’s estimated Share of Search among AI content detectors worldwide decreased from 37.5% to 37%.
  • Across the 11 months ending August 2026, Copyleaks’ estimated Share of Search among AI content detectors worldwide increased from 6.2% to 7.4%.
  • Across the 11 months ending August 2026, Turnitin’s estimated Share of Search among AI content detectors worldwide peaked at 64.2% in June 2026 and was lowest at 51.2% in March 2026.
  • Across the 11 months ending August 2026, GPTZero’s estimated Share of Search among AI content detectors worldwide peaked at 41.8% in March 2026 and was lowest at 28.7% in June 2026.
  • Across the 11 months ending August 2026, Copyleaks’ estimated Share of Search among AI content detectors worldwide peaked at 8% in July 2026 and was lowest at 5.1% in December 2025.
  • Across the 11 months ending August 2026, Winston AI and Originality.ai held steady: their estimated Share of Search among AI content detectors worldwide each moved less than 0.5 percentage points.

How did search popularity change for AI content detectors worldwide in August 2026?

  1. In August 2026, GPTZero gained estimated Share of Search among AI content detectors worldwide, from 32.6% to 37%.

  2. In August 2026, Turnitin lost estimated Share of Search among AI content detectors worldwide, from 59.4% to 55.5%.

  3. In August 2026, Copyleaks lost estimated Share of Search among AI content detectors worldwide, from 8% to 7.4%.

  4. In August 2026, Winston AI rose from 5th to 4th among AI content detectors worldwide.

  5. In August 2026, Originality.ai fell from 4th to 5th among AI content detectors worldwide.

How the Brand Demand Index is measured

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