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FastAPI VS Spring Boot_

As of 4 November 2026, Spring Boot is named by 4,174 companies and FastAPI by 3,305; FastAPI skews to companies under 200 people (54% vs 47%), Spring Boot to companies over 1,000 (28% vs 22%).

As of 4 November 2026 · refreshed daily · counts move as websites, DNS and career sites are re-read.

The website-and-DNS footprint is not comparable between a marketing suite and a CRM: FastAPI's script and mail records show on hundreds of thousands of small sites, Spring Boot rarely leaves a trace outside its own apps. Compare on the job-posting numbers; use the footprint for reach.

FastAPI: 2–200 employees
54%
Spring Boot: 2–200 employees
47%
FastAPI: 1,000+ employees
22%
Spring Boot: 1,000+ employees
28%
Postings per company, 90 days
2.5 · 4.8
Website or DNS footprint
0 · 0
3,305companies name FastAPI
4,174companies name Spring Boot
290name both
8,205 · 20,078postings in 90 days, FastAPI · Spring Boot
02 — Side by side

Who chooses which

Share of each tool's companies in every segment. "Leans" marks a gap of more than two points.

By company size
SegmentFastAPIshareSpring BootshareLeans
Self-employed2016%1183%FastAPI
2-10 employees54416%3488%FastAPI
11-50 employees60318%72717%even
51-200 employees63619%90522%Spring Boot
201-500 employees34911%56313%Spring Boot
501-1000 employees2307%3518%even
1001-5000 employees32910%54113%Spring Boot
5001-10000 employees1073%1644%even
10,001+ employees3069%45711%even
By industry
SegmentFastAPIshareSpring BootshareLeans
Technology & software1,89057%2,38857%even
Business & finance services65920%90522%even
Manufacturing & industry2317%1834%FastAPI
Media & content943%1333%even
Consumer services & leisure903%1002%even
Public, community & associations762%662%even
Utilities & infrastructure682%832%even
Commerce & trade552%1032%even
Property & construction371%381%even
Health care331%––outside top 12
Automotive281%341%even
Transport, logistics & rental241%672%even
Hospitality & travel––371%outside top 12
By country
SegmentFastAPIshareSpring BootshareLeans
United States1,82955%1,94147%FastAPI
United Kingdom2357%2506%even
Germany1795%3368%Spring Boot
India1735%2346%even
France1184%1754%even
Canada672%802%even
Spain411%––outside top 12
Poland411%642%even
Australia381%––outside top 12
Netherlands381%652%even
Singapore371%––outside top 12
Brazil351%782%even
Italy––792%outside top 12
Sweden––682%outside top 12
Switzerland––571%outside top 12
Postings by team (share of each tool's postings)
SegmentFastAPIshareSpring BootshareLeans
Software engineering5,70054%21,49182%Spring Boot
Data & AI3,43032%1,2595%FastAPI
IT operations & business systems2723%8983%even
Engineering (non-software)931%2131%even
Product, program & project management581%1471%even
Unclassified300%970%even
Sales250%560%even
General management & consulting230%220%even
Marketing & communications190%150%even
Finance & accounting130%110%even
Customer service & success120%340%even
research and science110%30%even
Education & training80%150%even
Design & UX70%80%even
Legal, compliance & risk70%70%even
logistics warehouse and transport70%40%even
construction and civil50%110%even
Business development & strategy40%30%even
Quality, safety & environment40%390%even
healthcare clinical20%10%even
arts media and entertainment10%10%even
facilities cleaning and security10%––outside top 12
Human resources10%100%even
public safety and protective services10%––outside top 12
Travel, leisure & events10%––outside top 12
hospitality and food service––20%outside top 12
manufacturing and production––20%outside top 12
skilled trades and field service––10%outside top 12
Go deeper

The companies behind each column

Companies using FastAPI →
Companies using Spring Boot →
backend frameworks ranked →

Cite this

Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.

Spring Boot is named by 4,174 companies in job postings and FastAPI by 3,305; 290 name both. (Breaknorm, 4 November 2026, https://breaknorm.co/compare/fastapi-vs-spring-boot)
How we know

Read from the source, not self-reported

Every number on this page can be traced to a page we crawled or a posting we read. Full methodology →

  • Job postingsRead hourly from career sites. A tool counts when the employer's own text names it as the team's system; both tools can count for one company.
  • Website and DNSScripts and embeds on the company's pages, plus SPF, DKIM, MX and CNAME records of its domain that point at the vendor.
  • SegmentsCountry, size and industry from the company profile built from its website.
  • Not a reviewNo ratings, prices or feature claims. For those, read the vendors.
FAQ

FastAPI vs Spring Boot: questions

Which is more used, FastAPI or Spring Boot?

By companies naming it in their own job postings, Spring Boot (4,174) over FastAPI (3,305). By website-and-DNS footprint, Spring Boot (0 vs 0), because its scripts and mail records sit on many small company sites.

Who chooses FastAPI?

54% of FastAPI companies have 2 to 200 employees, against 47% for Spring Boot. 22% of FastAPI companies have over 1,000 employees, against 28% for Spring Boot.

Do companies run both?

290 companies name both in their postings, usually FastAPI in marketing and Spring Boot in sales, or during a migration.

Where do these numbers come from?

From the employer's own text in job postings read hourly from career sites, and from scripts found on company websites in our crawl. No vendor data, no surveys.

Companies and people

Get either list your way

The same data as a search, over MCP and the API, as bulk files, or pushed to you as it changes.

SearchCompany searchFilter on what a company actually does→SearchPeople searchDecision makers, normalized and verified→MCP and APICompanies over MCP and APICount, search and export from your agent→DatasetCompany and People datasetThe whole market in your warehouse→DataCoverage by countryCheck your market before you start→SearchLocal businessesThe same database, by category and city→

Every company on either tool,
with the person who owns it

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