IS-IS VS Spanning Tree Protocol
As of 30 October 2026, Spanning Tree Protocol is named by 234 companies and IS-IS by 110; IS-IS skews to companies under 200 people (40% vs 35%), Spanning Tree Protocol to companies over 1,000 (44% vs 41%).
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: IS-IS's script and mail records show on hundreds of thousands of small sites, Spanning Tree Protocol rarely leaves a trace outside its own apps. Compare on the job-posting numbers; use the footprint for reach.
- IS-IS: 2–200 employees
- 40%
- Spanning Tree Protocol: 2–200 employees
- 35%
- IS-IS: 1,000+ employees
- 41%
- Spanning Tree Protocol: 1,000+ employees
- 44%
- Postings per company, 90 days
- 3.7 · 3.2
- 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 | IS-IS | share | Spanning Tree Protocol | share | Leans |
|---|---|---|---|---|---|
| 2-10 employees | 5 | 5% | 12 | 5% | even |
| 11-50 employees | 12 | 11% | 25 | 11% | even |
| 51-200 employees | 27 | 25% | 45 | 19% | IS-IS |
| 201-500 employees | 13 | 12% | 31 | 13% | even |
| 501-1000 employees | 8 | 7% | 16 | 7% | even |
| 1001-5000 employees | 19 | 17% | 41 | 18% | even |
| 5001-10000 employees | 7 | 6% | 23 | 10% | Spanning Tree Protocol |
| 10,001+ employees | 19 | 17% | 38 | 16% | even |
| Self-employed | – | – | 3 | 1% | outside top 12 |
| Segment | IS-IS | share | Spanning Tree Protocol | share | Leans |
|---|---|---|---|---|---|
| Technology & software | 56 | 51% | 103 | 44% | IS-IS |
| Utilities & infrastructure | 27 | 25% | 15 | 6% | IS-IS |
| Manufacturing & industry | 6 | 5% | 30 | 13% | Spanning Tree Protocol |
| Media & content | 6 | 5% | 10 | 4% | even |
| Business & finance services | 5 | 5% | 35 | 15% | Spanning Tree Protocol |
| Public, community & associations | 3 | 3% | 4 | 2% | even |
| Property & construction | 3 | 3% | 7 | 3% | even |
| Automotive | 1 | 1% | 5 | 2% | even |
| Consumer services & leisure | 1 | 1% | 9 | 4% | Spanning Tree Protocol |
| Health care | 1 | 1% | 5 | 2% | even |
| Transport, logistics & rental | 1 | 1% | 5 | 2% | even |
| Commerce & trade | – | – | 4 | 2% | outside top 12 |
| Segment | IS-IS | share | Spanning Tree Protocol | share | Leans |
|---|---|---|---|---|---|
| United States | 64 | 58% | 147 | 63% | Spanning Tree Protocol |
| United Kingdom | 10 | 9% | 8 | 3% | IS-IS |
| Germany | 7 | 6% | 15 | 6% | even |
| France | 7 | 6% | 13 | 6% | even |
| Italy | 3 | 3% | 7 | 3% | even |
| Belgium | 2 | 2% | – | – | outside top 12 |
| Brazil | 2 | 2% | 5 | 2% | even |
| Switzerland | 2 | 2% | 3 | 1% | even |
| Czechia | 2 | 2% | – | – | outside top 12 |
| Norway | 2 | 2% | – | – | outside top 12 |
| Australia | 1 | 1% | – | – | outside top 12 |
| China | 1 | 1% | – | – | outside top 12 |
| India | – | – | 9 | 4% | outside top 12 |
| Canada | – | – | 6 | 3% | outside top 12 |
| Japan | – | – | 3 | 1% | outside top 12 |
| Netherlands | – | – | 2 | 1% | outside top 12 |
| Sweden | – | – | 2 | 1% | outside top 12 |
| Segment | IS-IS | share | Spanning Tree Protocol | share | Leans |
|---|---|---|---|---|---|
| IT operations & business systems | 291 | 55% | 609 | 59% | Spanning Tree Protocol |
| Software engineering | 60 | 11% | 95 | 9% | IS-IS |
| Sales | 26 | 5% | 37 | 4% | even |
| Engineering (non-software) | 19 | 4% | 22 | 2% | even |
| Skilled trades and field service | 10 | 2% | – | – | outside top 12 |
| Customer service & success | 9 | 2% | 32 | 3% | even |
| Construction and civil | 5 | 1% | – | – | outside top 12 |
| Product, program & project management | 5 | 1% | 6 | 1% | even |
| Manufacturing and production | 4 | 1% | – | – | outside top 12 |
| Facilities cleaning and security | 2 | 0% | – | – | outside top 12 |
| Administration & office | 1 | 0% | – | – | outside top 12 |
| Healthcare support and caregiving | 1 | 0% | – | – | outside top 12 |
| General management & consulting | – | – | 6 | 1% | outside top 12 |
| Design & UX | – | – | 2 | 0% | outside top 12 |
| Human resources | – | – | 2 | 0% | outside top 12 |
| Quality, safety & environment | – | – | 2 | 0% | outside top 12 |
| Finance & accounting | – | – | 1 | 0% | outside top 12 |
| Legal, compliance & risk | – | – | 1 | 0% | outside top 12 |
The companies behind each column
Companies using IS-IS →
Companies using Spanning Tree Protocol →
network protocols ranked →
Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.
Spanning Tree Protocol is named by 234 companies in job postings and IS-IS by 110; 29 name both. (Breaknorm, 30 October 2026, https://breaknorm.co/compare/is-is-vs-spanning-tree-protocol)
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.
IS-IS vs Spanning Tree Protocol: questions
Which is more used, IS-IS or Spanning Tree Protocol?
By companies naming it in their own job postings, Spanning Tree Protocol (234) over IS-IS (110). By website-and-DNS footprint, Spanning Tree Protocol (0 vs 0), because its scripts and mail records sit on many small company sites.
Who chooses IS-IS?
40% of IS-IS companies have 2 to 200 employees, against 35% for Spanning Tree Protocol. 41% of IS-IS companies have over 1,000 employees, against 44% for Spanning Tree Protocol.
Do companies run both?
29 companies name both in their postings, usually IS-IS in marketing and Spanning Tree Protocol 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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with the person who owns it
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