--- title: "Labcorp vs Quest Diagnostics: Which is searched more in the United States?" description: "Is Labcorp or Quest Diagnostics more popular in search? Compare estimated monthly branded-search demand and Share of Search inside the Lab testing companies set in the United States. 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." canonical: "https://gobrandwave.com/demand/us/compare/labcorp-vs-quest-diagnostics" publisher: "Brandwave" --- # Labcorp vs Quest Diagnostics: Which is searched more in the United States? Is Labcorp or Quest Diagnostics more popular in search? Compare estimated monthly branded-search demand and Share of Search inside the Lab testing companies set in the United States. 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. ## Key facts - **Compared**: Labcorp and Quest Diagnostics - **Competitive set**: Lab testing companies - **Market**: United States - **Month measured**: Sep 2026 - **Labcorp Share of Search**: 48.3% - **Quest Diagnostics Share of Search**: 48.3% ## Is Labcorp or Quest Diagnostics more popular in search? - 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. - 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. ## 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. Brands get a higher AI rank if they are mentioned earlier in the answers that list options. | Brand | AI rank | ChatGPT answers that named it | Google AI Overviews that named it | All answers that named it | | --- | --- | --- | --- | --- | | Labcorp | 1st | 3 of 3 | 1 of 1 | 4 of 4 | | Quest Diagnostics | 2nd | 3 of 3 | 1 of 1 | 4 of 4 | | Any Lab Test Now | Not ranked | 0 of 3 | 0 of 1 | 0 of 4 | | Sonora Quest | Not ranked | 0 of 3 | 0 of 1 | 0 of 4 | | Walk-In Lab | Not ranked | 0 of 3 | 0 of 1 | 0 of 4 | | Ulta Lab Tests | Not ranked | 0 of 3 | 0 of 1 | 0 of 4 | ## Every AI answer about lab testing companies - Asked ChatGPT "Where's the best place to get blood work done?": 1. Labcorp, 2. Quest Diagnostics - Asked ChatGPT "Which lab testing company is best for routine blood tests?": 1. Quest Diagnostics, 2. Labcorp - Asked ChatGPT "Where can I order my own blood tests online?": 1. Labcorp, 2. Quest Diagnostics - Searched Google, AI Overview "lab testing": 1. Labcorp, 2. Quest Diagnostics Not named in any answer: Any Lab Test Now, Sonora Quest, Walk-In Lab and Ulta Lab Tests. Brands are listed in the order each answer named them. The answers were collected in United States on October 23, 2026. ## How did search popularity change for United States lab testing companies in September 2026? - 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. ## Month by month | Month | Labcorp estimated searches | Labcorp Share of Search | Labcorp rank | Quest Diagnostics estimated searches | Quest Diagnostics Share of Search | Quest Diagnostics rank | | --- | --- | --- | --- | --- | --- | --- | | Oct 2025 | 4.1M | 43.5% | 2 | 5M | 53.1% | 1 | | Nov 2025 | 4.1M | 48.5% | 1 | 4.1M | 48.5% | 2 | | Dec 2025 | 4.1M | 48.4% | 1 | 4.1M | 48.4% | 2 | | Jan 2026 | 4.1M | 48.1% | 1 | 4.1M | 48.1% | 2 | | Feb 2026 | 4.1M | 48.3% | 1 | 4.1M | 48.3% | 2 | | Mar 2026 | 5M | 48.4% | 1 | 5M | 48.4% | 2 | | Apr 2026 | 4.1M | 43.4% | 2 | 5M | 53.1% | 1 | | May 2026 | 4.1M | 48.3% | 1 | 4.1M | 48.3% | 2 | | Jun 2026 | 4.1M | 48.3% | 1 | 4.1M | 48.3% | 2 | | Jul 2026 | 4.1M | 48.2% | 1 | 4.1M | 48.2% | 2 | | Aug 2026 | 4.1M | 48.3% | 1 | 4.1M | 48.3% | 2 | | Sep 2026 | 4.1M | 48.3% | 1 | 4.1M | 48.3% | 2 | ## How each brand is measured 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**: Measured on the search term “labcorp”. - **Quest Diagnostics**: Measured on the search term “quest diagnostics”. - [Labcorp profile](/demand/us/brands/labcorp) - [Quest Diagnostics profile](/demand/us/brands/quest-diagnostics) - [All lab testing companies in the United States](/demand/us/categories/us-lab-testing-companies): The set both shares are measured inside, 6 brands. ## Methodology - [How is the Brand Demand Index measured?](/demand/methodology): Where the figures come from, what they compare, and how they may be reused. ## Frequently asked questions ### Is Labcorp or Quest Diagnostics more popular in search? 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. ## Cite this page Brandwave. "Labcorp vs Quest Diagnostics: Which is searched more in the United States?". https://gobrandwave.com/demand/us/compare/labcorp-vs-quest-diagnostics This page is also available as HTML at https://gobrandwave.com/demand/us/compare/labcorp-vs-quest-diagnostics. Brandwave publishes an index of its Markdown pages at https://gobrandwave.com/llms.txt.