JSON Schema VS XML Schema (XSD)
As of 30 October 2026, XML Schema (XSD) is named by 203 companies and JSON Schema by 127; JSON Schema skews to companies under 200 people (34% vs 44%), XML Schema (XSD) to companies over 1,000 (33% vs 35%).
As of 30 October 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: JSON Schema's script and mail records show on hundreds of thousands of small sites, XML Schema (XSD) rarely leaves a trace outside its own apps. Compare on the job-posting numbers; use the footprint for reach.
- JSON Schema: 2–200 employees
- 34%
- XML Schema (XSD): 2–200 employees
- 44%
- JSON Schema: 1,000+ employees
- 35%
- XML Schema (XSD): 1,000+ employees
- 33%
- Postings per company, 90 days
- 1.9 · 2.1
- Website or DNS footprint
- 0 · 0
Who chooses which
Share of each tool's companies in every segment. "Leans" marks a gap of more than two points.
| Segment | JSON Schema | share | XML Schema (XSD) | share | Leans |
|---|---|---|---|---|---|
| Self-employed | 5 | 4% | 2 | 1% | JSON Schema |
| 2-10 employees | 6 | 5% | 9 | 4% | even |
| 11-50 employees | 19 | 15% | 44 | 22% | XML Schema (XSD) |
| 51-200 employees | 18 | 14% | 36 | 18% | XML Schema (XSD) |
| 201-500 employees | 20 | 16% | 22 | 11% | JSON Schema |
| 501-1000 employees | 15 | 12% | 23 | 11% | even |
| 1001-5000 employees | 15 | 12% | 40 | 20% | XML Schema (XSD) |
| 5001-10000 employees | 8 | 6% | 9 | 4% | even |
| 10,001+ employees | 21 | 17% | 18 | 9% | JSON Schema |
| Segment | JSON Schema | share | XML Schema (XSD) | share | Leans |
|---|---|---|---|---|---|
| Technology & software | 68 | 54% | 128 | 63% | XML Schema (XSD) |
| Business & finance services | 23 | 18% | 36 | 18% | even |
| Manufacturing & industry | 12 | 9% | 13 | 6% | JSON Schema |
| Public, community & associations | 5 | 4% | 4 | 2% | even |
| Media & content | 5 | 4% | 2 | 1% | JSON Schema |
| Health care | 3 | 2% | 1 | 0% | even |
| Utilities & infrastructure | 3 | 2% | 4 | 2% | even |
| Automotive | 2 | 2% | 2 | 1% | even |
| Consumer services & leisure | 2 | 2% | 2 | 1% | even |
| Transport, logistics & rental | 2 | 2% | 6 | 3% | even |
| Commerce & trade | 1 | 1% | 4 | 2% | even |
| Hospitality & travel | 1 | 1% | – | – | outside top 12 |
| Property & construction | – | – | 1 | 0% | outside top 12 |
| Segment | JSON Schema | share | XML Schema (XSD) | share | Leans |
|---|---|---|---|---|---|
| United States | 90 | 71% | 122 | 60% | JSON Schema |
| United Kingdom | 12 | 9% | 20 | 10% | even |
| Australia | 4 | 3% | – | – | outside top 12 |
| Canada | 4 | 3% | 3 | 1% | even |
| Brazil | 3 | 2% | – | – | outside top 12 |
| India | 2 | 2% | 5 | 2% | even |
| Mexico | 2 | 2% | – | – | outside top 12 |
| Singapore | 2 | 2% | – | – | outside top 12 |
| Austria | 1 | 1% | – | – | outside top 12 |
| Germany | 1 | 1% | 5 | 2% | even |
| Denmark | 1 | 1% | 3 | 1% | even |
| France | 1 | 1% | 4 | 2% | even |
| Poland | – | – | 7 | 3% | outside top 12 |
| United Arab Emirates | – | – | 4 | 2% | outside top 12 |
| Czechia | – | – | 4 | 2% | outside top 12 |
| Spain | – | – | 3 | 1% | outside top 12 |
| Italy | – | – | 3 | 1% | outside top 12 |
| Segment | JSON Schema | share | XML Schema (XSD) | share | Leans |
|---|---|---|---|---|---|
| Software engineering | 129 | 42% | 558 | 63% | XML Schema (XSD) |
| Data & AI | 88 | 28% | 39 | 4% | JSON Schema |
| IT operations & business systems | 20 | 6% | 111 | 12% | XML Schema (XSD) |
| Legal, compliance & risk | 4 | 1% | – | – | outside top 12 |
| Engineering (non-software) | 3 | 1% | 11 | 1% | even |
| Product, program & project management | 3 | 1% | 14 | 2% | even |
| Design & UX | 2 | 1% | – | – | outside top 12 |
| Sales | 2 | 1% | 3 | 0% | even |
| Administration & office | 1 | 0% | – | – | outside top 12 |
| Arts media and entertainment | 1 | 0% | 1 | 0% | even |
| Marketing & communications | 1 | 0% | – | – | outside top 12 |
| Real estate and property | 1 | 0% | – | – | outside top 12 |
| Customer service & success | – | – | 5 | 1% | outside top 12 |
| Finance & accounting | – | – | 4 | 0% | outside top 12 |
| Human resources | – | – | 4 | 0% | outside top 12 |
| Research and science | – | – | 2 | 0% | outside top 12 |
| Construction and civil | – | – | 1 | 0% | outside top 12 |
The companies behind each column
Companies using JSON Schema →
Companies using XML Schema (XSD) →
api specs data formats ranked →
Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.
XML Schema (XSD) is named by 203 companies in job postings and JSON Schema by 127; 0 name both. (Breaknorm, 30 October 2026, https://breaknorm.co/compare/json-schema-vs-xml-schema)
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.
JSON Schema vs XML Schema (XSD): questions
Which is more used, JSON Schema or XML Schema (XSD)?
By companies naming it in their own job postings, XML Schema (XSD) (203) over JSON Schema (127). By website-and-DNS footprint, XML Schema (XSD) (0 vs 0), because its scripts and mail records sit on many small company sites.
Who chooses JSON Schema?
34% of JSON Schema companies have 2 to 200 employees, against 44% for XML Schema (XSD). 35% of JSON Schema companies have over 1,000 employees, against 33% for XML Schema (XSD).
Do companies run both?
0 companies name both in their postings, usually JSON Schema in marketing and XML Schema (XSD) 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.
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