Labcorp vs Quest Diagnostics:Which is more popular?
In September 2026, Labcorp and Quest Diagnostics were level in searches among lab testing companies in the United States, with an estimated 4.1M branded searches each, at 48.3% of the total each. When we asked ChatGPT and Google AI Overviews about lab testing companies, both Labcorp and Quest Diagnostics appeared in all four answers. Labcorp was mentioned before Quest Diagnostics in two out of three answers.
Who do people search for more?
Labcorp and Quest Diagnostics are searched for about as often as each other.
Who does AI mention more?
Both are mentioned in every answer we collected.
Who does AI recommend more?
Labcorp, named ahead of Quest Diagnostics in 2 of 3 answers
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Top lab testing companies in ChatGPT and Google AI Overviews
In three ChatGPT questions and one Google AI Overview, both Labcorp and Quest Diagnostics showed up in all four answers. Labcorp was listed before Quest Diagnostics in two of them.
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 Labcorp or Quest Diagnostics more popular in search?
This chart shows how often people search Google for Labcorp and Quest Diagnostics 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 Labcorp, Quest Diagnostics. 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 Labcorp and Quest Diagnostics comparison changed over the last 12 months?
3 findings
- Labcorp was ahead of Quest Diagnostics in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, Labcorp’s share of searches among lab testing companies in the United States moved from 43.5% to 48.3%, and its estimated monthly branded searches held steady at 4.1M.
- 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.
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 Labcorp’s and Quest Diagnostics’ 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.
Labcorp
1 branded search term
- labcorp
Quest Diagnostics
1 branded search term
- quest diagnostics
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