Share of companies with a recorded size, by employees.
No size recorded: 209
Versions detected
1 versions across the confirmed companies. Counts are distinct companies seen running that version.
1.9.361
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Frequently asked questions
About the Quarto data on this page.
How many companies use Quarto?
Firmable holds confirmed Quarto detections for 346 distinct companies, 295 of them confirmed in the last 90 days. A company is counted once however many of its properties run it.
Which companies use Quarto?
American Society of Nephrology, SecureBio and Aequion are among the most prominent in the current set.
What industries use Quarto?
Professional and business services, education and training and information technology and services lead the set, across 19 industries in total.
What size companies use Quarto?
Adoption concentrates in the 1-10 employee band, across the companies whose size is recorded.
Where are Quarto users based?
The United States, Australia, Canada and New Zealand account for most detections, across 13 countries.
How current is this data?
295 companies were confirmed in the last 90 days. Last detection 13 October 2026.
