Brandwave

How popular isQuest Diagnostics?

In September 2026, people searched for Quest Diagnostics by name about 4.1 million times in the United States, an 18.2% decrease from the previous year. These searches made up 48.3% of all United States lab testing company searches, placing Quest Diagnostics second out of six companies. When we asked both ChatGPT and Google AI Overviews about lab testing companies, Quest Diagnostics appeared in all answers and was the second most recommended of the six.

Search and AI answers in September 2026

Quest Diagnostics is the second most searched of 6 competitors and the second most recommended in AI answers.

  1. LabcorpShare of searches 48.3%Mentioned in 4 of 4 AI answersPlace in AI recommendations 1st
  2. Quest DiagnosticsShare of searches 48.3%Mentioned in 4 of 4 AI answersPlace in AI recommendations 2nd
  3. Any Lab Test NowShare of searches 1.6%Mentioned in 0 of 4 AI answersPlace in AI recommendations –
  4. Sonora QuestShare of searches 1.6%Mentioned in 0 of 4 AI answersPlace in AI recommendations –
  5. Walk-In LabShare of searches 0.14%Mentioned in 0 of 4 AI answersPlace in AI recommendations –

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Top lab testing companies in ChatGPT and Google AI Overviews

In three ChatGPT questions and one Google AI Overview, Quest Diagnostics appeared in all four answers. Quest Diagnostics is the second most recommended of the six.

Most recommended by AI

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

  1. Labcorp1st
  2. Quest Diagnostics2nd
  3. Any Lab Test Now–
  4. Sonora Quest–
  5. Walk-In Lab–
  6. Ulta Lab Tests–

Mentioned by AI

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

  • Labcorp4 of 4Named in 3 of 3 ChatGPT answersNamed in 1 of 1 Google answers
  • Quest Diagnostics4 of 4Named in 3 of 3 ChatGPT answersNamed in 1 of 1 Google answers
  • Any Lab Test Now0 of 4Named in 0 of 3 ChatGPT answersNamed in 0 of 1 Google answers
  • Sonora Quest0 of 4Named in 0 of 3 ChatGPT answersNamed in 0 of 1 Google answers
  • Walk-In Lab0 of 4Named in 0 of 3 ChatGPT answersNamed in 0 of 1 Google answers
  • Ulta Lab Tests0 of 4Named in 0 of 3 ChatGPT answersNamed in 0 of 1 Google answers

See every answer about lab testing companies

4 answers

Not named in any answer:

Brands are shown in the order each answer named them. The survey took place in United States on October 23, 2026.

Which lab testing companies compete with Quest Diagnostics?

Quest Diagnostics against lab testing companies in the United States, by month

Share of searches by month for Labcorp, Quest Diagnostics. The figures are in the table below the chart.

View monthly share of searches table
MonthLabcorpQuest DiagnosticsAny Lab Test NowSonora QuestWalk-In LabUlta Lab Tests
Oct 202543.5%53.1%1.8%1.4%0.13%0.06%
Nov 202548.5%48.5%1.6%1.3%0.12%0.06%
Dec 202548.4%48.4%1.6%1.3%0.14%0.08%
Jan 202648.1%48.1%1.9%1.6%0.17%0.12%
Feb 202648.3%48.3%1.6%1.6%0.14%0.12%
Mar 202648.4%48.4%1.6%1.3%0.14%0.1%
Apr 202643.4%53.1%1.8%1.4%0.16%0.11%
May 202648.3%48.3%1.6%1.6%0.17%0.1%
Jun 202648.3%48.3%1.6%1.6%0.14%0.12%
Jul 202648.2%48.2%1.6%1.6%0.26%0.12%
Aug 202648.3%48.3%1.6%1.6%0.21%0.1%
Sep 202648.3%48.3%1.6%1.6%0.14%0.1%

  1. 1.Labcorp

    48.3%

    Held 1st. 4.1M estimated branded searches, 0% vs prior month. Share 0 points.

  2. 2.Quest Diagnostics

    48.3%

    Held 2nd. 4.1M estimated branded searches, 0% vs prior month. Share 0 points.

  3. 3.Any Lab Test Now

    1.6%

    Held 3rd. 135K estimated branded searches, 0% vs prior month. Share 0 points.

  4. 4.Sonora Quest

    1.6%

    Held 4th. 135K estimated branded searches, 0% vs prior month. Share 0 points.

  5. 5.Walk-In Lab

    0.14%

    Held 5th. 12.1K estimated branded searches, -33.1% vs prior month. Share -0.1 points.

  6. 6.Ulta Lab Tests

    0.1%

    Held 6th. 8.1K estimated branded searches, 0% vs prior month. Share 0 points.

Compare popularity between Quest Diagnostics and its closest rivals

Every comparison with Quest Diagnostics

5 comparisons

How has branded search demand for Quest Diagnostics changed in the United States over the last 12 months?

4 findings
  • Across the 12 months ending September 2026, estimated monthly branded searches for Quest Diagnostics in the United States fell from 5M to 4.1M.
  • Across the 12 months ending September 2026, Quest Diagnostics’ share of searches among lab testing companies in the United States decreased from 53.1% to 48.3%.
  • Across the 12 months ending September 2026, Quest Diagnostics’ share of searches among lab testing companies in the United States peaked at 53.1% in October 2025 and was lowest at 48.1% in January 2026.
  • Across the 12 months ending September 2026, Quest Diagnostics fell from 1st to 2nd among lab testing companies in the United States.

How did search popularity change for United States lab testing companies in September 2026?

3 changes

  1. Estimated monthly branded searches for Ulta Lab Tests in the United States rose 50% over 12 measured months, from 5.4K to 8.1K in September 2026.

  2. Estimated monthly branded searches for Quest Diagnostics in the United States fell 18.2% over 12 measured months, from 5M to 4.1M in September 2026.

  3. Estimated monthly branded searches for Any Lab Test Now in the United States fell 18.2% over 12 measured months, from 165K to 135K in September 2026.

How are Quest Diagnostics’ branded searches counted?

1 search term

Brandwave collects information about searches that people make online using Quest Diagnostics’ name. When viewed over time, estimated search volumes for this branded term can be used to understand whether interest in the brand is growing, holding steady, or fading.

  • quest diagnostics

Do you work for Quest Diagnostics? To request corrections or removal please contact us via our support page and we will be happy to assist.

How the Brand Demand Index is measured

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