IEC 61131 VS Siemens SIMATIC S7
As of 30 October 2026, Siemens SIMATIC S7 is named by 909 companies and IEC 61131 by 233; IEC 61131 skews to companies under 200 people (36% vs 35%), Siemens SIMATIC S7 to companies over 1,000 (42% vs 42%).
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: IEC 61131's script and mail records show on hundreds of thousands of small sites, Siemens SIMATIC S7 rarely leaves a trace outside its own apps. Compare on the job-posting numbers; use the footprint for reach.
- IEC 61131: 2–200 employees
- 36%
- Siemens SIMATIC S7: 2–200 employees
- 35%
- IEC 61131: 1,000+ employees
- 42%
- Siemens SIMATIC S7: 1,000+ employees
- 42%
- Postings per company, 90 days
- 1.9 · 2.3
- 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 | IEC 61131 | share | Siemens SIMATIC S7 | share | Leans |
|---|---|---|---|---|---|
| Self-employed | 2 | 1% | 1 | 0% | even |
| 2-10 employees | 17 | 7% | 63 | 7% | even |
| 11-50 employees | 21 | 9% | 100 | 11% | even |
| 51-200 employees | 45 | 19% | 151 | 17% | IEC 61131 |
| 201-500 employees | 28 | 12% | 115 | 13% | even |
| 501-1000 employees | 21 | 9% | 95 | 10% | even |
| 1001-5000 employees | 38 | 16% | 156 | 17% | even |
| 5001-10000 employees | 12 | 5% | 64 | 7% | even |
| 10,001+ employees | 49 | 21% | 164 | 18% | IEC 61131 |
| Segment | IEC 61131 | share | Siemens SIMATIC S7 | share | Leans |
|---|---|---|---|---|---|
| Manufacturing & industry | 132 | 57% | 606 | 67% | Siemens SIMATIC S7 |
| Business & finance services | 20 | 9% | 53 | 6% | IEC 61131 |
| Utilities & infrastructure | 19 | 8% | 39 | 4% | IEC 61131 |
| Property & construction | 12 | 5% | 45 | 5% | even |
| Technology & software | 12 | 5% | 17 | 2% | IEC 61131 |
| Automotive | 10 | 4% | 50 | 6% | even |
| Public, community & associations | 9 | 4% | 16 | 2% | IEC 61131 |
| Commerce & trade | 8 | 3% | 34 | 4% | even |
| Media & content | 5 | 2% | 13 | 1% | even |
| Consumer services & leisure | 2 | 1% | 10 | 1% | even |
| Transport, logistics & rental | 2 | 1% | 14 | 2% | even |
| Agriculture & forestry | 1 | 0% | 5 | 1% | even |
| Segment | IEC 61131 | share | Siemens SIMATIC S7 | share | Leans |
|---|---|---|---|---|---|
| United States | 106 | 45% | 263 | 29% | IEC 61131 |
| Germany | 58 | 25% | 383 | 42% | Siemens SIMATIC S7 |
| United Kingdom | 11 | 5% | 40 | 4% | even |
| France | 8 | 3% | 21 | 2% | even |
| Italy | 7 | 3% | 15 | 2% | even |
| Austria | 4 | 2% | 34 | 4% | Siemens SIMATIC S7 |
| Canada | 4 | 2% | 16 | 2% | even |
| Switzerland | 4 | 2% | 18 | 2% | even |
| Netherlands | 4 | 2% | 20 | 2% | even |
| Denmark | 3 | 1% | 8 | 1% | even |
| Australia | 2 | 1% | – | – | outside top 12 |
| Brazil | 2 | 1% | – | – | outside top 12 |
| India | – | – | 13 | 1% | outside top 12 |
| Belgium | – | – | 11 | 1% | outside top 12 |
| Segment | IEC 61131 | share | Siemens SIMATIC S7 | share | Leans |
|---|---|---|---|---|---|
| Engineering (non-software) | 356 | 62% | 1,131 | 39% | IEC 61131 |
| Software engineering | 87 | 15% | 67 | 2% | IEC 61131 |
| Skilled trades and field service | 22 | 4% | 1,178 | 41% | Siemens SIMATIC S7 |
| Sales | 13 | 2% | 4 | 0% | IEC 61131 |
| IT operations & business systems | 5 | 1% | 19 | 1% | even |
| Quality, safety & environment | 5 | 1% | – | – | outside top 12 |
| Product, program & project management | 4 | 1% | 10 | 0% | even |
| Customer service & success | 3 | 1% | 7 | 0% | even |
| Construction and civil | 2 | 0% | 28 | 1% | even |
| Unclassified | 2 | 0% | 4 | 0% | even |
| General management & consulting | 1 | 0% | – | – | outside top 12 |
| Manufacturing and production | – | – | 20 | 1% | outside top 12 |
| Education & training | – | – | 12 | 0% | outside top 12 |
| Logistics warehouse and transport | – | – | 3 | 0% | outside top 12 |
The companies behind each column
Companies using IEC 61131 →
Companies using Siemens SIMATIC S7 →
plc programming ranked →
Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.
Siemens SIMATIC S7 is named by 909 companies in job postings and IEC 61131 by 233; 35 name both. (Breaknorm, 30 October 2026, https://breaknorm.co/compare/iec-61131-vs-simatic-s7)
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.
IEC 61131 vs Siemens SIMATIC S7: questions
Which is more used, IEC 61131 or Siemens SIMATIC S7?
By companies naming it in their own job postings, Siemens SIMATIC S7 (909) over IEC 61131 (233). By website-and-DNS footprint, Siemens SIMATIC S7 (0 vs 0), because its scripts and mail records sit on many small company sites.
Who chooses IEC 61131?
36% of IEC 61131 companies have 2 to 200 employees, against 35% for Siemens SIMATIC S7. 42% of IEC 61131 companies have over 1,000 employees, against 42% for Siemens SIMATIC S7.
Do companies run both?
35 companies name both in their postings, usually IEC 61131 in marketing and Siemens SIMATIC S7 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.
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.
Every company on either tool,
with the person who owns it
Filter on IEC 61131 or Siemens SIMATIC S7. Start free, no card.