A breakdown of the 15K+ companies running FastAPI.
Top industries
Information technology and services8.5K+
Professional and business services1.7K+
Financial services1.2K+
Industrial and manufacturing780
Education and training494
Construction and building324
Media and telecommunications318
Health and wellness317
No industry recorded: 616
Company size
1–102,076 (16%)
11–502,648 (20%)
51–2503,438 (26%)
251–5001,356 (10%)
501–1,000901 (7%)
1,001–5,0001,460 (11%)
5,001–10,000452 (3%)
10,001+862 (7%)
Share of companies with a recorded size, by employees.
No size recorded: 2.3K+
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Frequently asked questions
About the FastAPI data on this page.
How many companies use FastAPI?
Firmable holds confirmed FastAPI detections for 15,536 distinct companies, 6,723 of them confirmed in the last 90 days. A company is counted once however many of its properties run it.
Which companies use FastAPI?
Stark Tech, Arevon Energy, Inc. and Wave Life Sciences are among the most prominent in the current set.
What industries use FastAPI?
Information technology and services, professional and business services and financial services lead the set, across 19 industries in total.
What size companies use FastAPI?
Adoption concentrates in the 51-250 employee band, across the companies whose size is recorded.
Where are FastAPI users based?
The United States, Canada, Australia and Singapore account for most detections, across 13 countries.
How current is this data?
6,723 companies were confirmed in the last 90 days. Last detection 13 October 2026.
