Quest Diagnostics vs Sonora Quest:Which is more popular?
In September 2026, Quest Diagnostics had more branded searches than Sonora Quest among lab testing companies in the United States. Quest Diagnostics had about 4.1 million branded searches, while Sonora Quest had 135,000. Quest Diagnostics made up 48.3% of all lab testing company searches we track, and Sonora Quest accounted for 1.6%. When we asked ChatGPT and Google AI Overviews about lab testing companies, Quest Diagnostics appeared in all four answers and Sonora Quest in none.
Who do people search for more?
Quest Diagnostics, about 30 searches for every 1 for Sonora Quest
Who does AI mention more?
Quest Diagnostics, mentioned in every answer we collected
Who does AI recommend more?
Quest Diagnostics, the only one of the two named
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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. Sonora Quest did not appear in any of the four answers.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
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
Asked ChatGPT
“Where's the best place to get blood work done?”
Asked ChatGPT
“Which lab testing company is best for routine blood tests?”
Asked ChatGPT
“Where can I order my own blood tests online?”
Searched Google, AI Overview
“lab testing”
Searched Google, AI Overview
“lab test near me”
Google showed no AI Overview for this search.
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.
Is Quest Diagnostics or Sonora Quest more popular in search?
This chart shows how often people search Google for Quest Diagnostics and Sonora Quest by name. Each line represents a brand's share of searches for all six lab testing companies we track, month by month, from searches in United States.
Share of searches by month for Quest Diagnostics, Sonora Quest. The figures are in the table below the chart.
View monthly share of searches table
| Month | Labcorp | Quest Diagnostics | Any Lab Test Now | Sonora Quest | Walk-In Lab | Ulta Lab Tests |
|---|---|---|---|---|---|---|
| Oct 2025 | 43.5% | 53.1% | 1.8% | 1.4% | 0.13% | 0.06% |
| Nov 2025 | 48.5% | 48.5% | 1.6% | 1.3% | 0.12% | 0.06% |
| Dec 2025 | 48.4% | 48.4% | 1.6% | 1.3% | 0.14% | 0.08% |
| Jan 2026 | 48.1% | 48.1% | 1.9% | 1.6% | 0.17% | 0.12% |
| Feb 2026 | 48.3% | 48.3% | 1.6% | 1.6% | 0.14% | 0.12% |
| Mar 2026 | 48.4% | 48.4% | 1.6% | 1.3% | 0.14% | 0.1% |
| Apr 2026 | 43.4% | 53.1% | 1.8% | 1.4% | 0.16% | 0.11% |
| May 2026 | 48.3% | 48.3% | 1.6% | 1.6% | 0.17% | 0.1% |
| Jun 2026 | 48.3% | 48.3% | 1.6% | 1.6% | 0.14% | 0.12% |
| Jul 2026 | 48.2% | 48.2% | 1.6% | 1.6% | 0.26% | 0.12% |
| Aug 2026 | 48.3% | 48.3% | 1.6% | 1.6% | 0.21% | 0.1% |
| Sep 2026 | 48.3% | 48.3% | 1.6% | 1.6% | 0.14% | 0.1% |
How has the Quest Diagnostics and Sonora Quest comparison changed over the last 12 months?
3 findings
- Quest Diagnostics was ahead of Sonora Quest in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, Quest Diagnostics’ share of searches among lab testing companies in the United States moved from 53.1% to 48.3%, and its estimated monthly branded searches moved from 5M to 4.1M.
- Across the 12 months ending September 2026, Sonora Quest’s share of searches among lab testing companies in the United States moved from 1.4% to 1.6%, and its estimated monthly branded searches held steady at 135K.
How did search popularity change for United States lab testing companies in September 2026?
1 change
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.
How are branded searches counted?
2 search terms
Brandwave collects information about searches that people make online using Quest Diagnostics’ and Sonora Quest’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.
Quest Diagnostics
1 branded search term
- quest diagnostics
Sonora Quest
1 branded search term
- sonora quest
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