Cisco IOS VS Junos OS
As of 30 October 2026, Junos OS is named by 109 companies and Cisco IOS by 175; Cisco IOS skews to companies under 200 people (42% vs 44%), Junos OS to companies over 1,000 (31% vs 37%).
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: Cisco IOS's script and mail records show on hundreds of thousands of small sites, Junos OS rarely leaves a trace outside its own apps. Compare on the job-posting numbers; use the footprint for reach.
- Cisco IOS: 2–200 employees
- 42%
- Junos OS: 2–200 employees
- 44%
- Cisco IOS: 1,000+ employees
- 37%
- Junos OS: 1,000+ employees
- 31%
- Postings per company, 90 days
- 2.6 · 3.9
- 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 | Cisco IOS | share | Junos OS | share | Leans |
|---|---|---|---|---|---|
| Self-employed | 1 | 1% | 1 | 1% | even |
| 2-10 employees | 13 | 7% | 8 | 7% | even |
| 11-50 employees | 20 | 11% | 14 | 13% | even |
| 51-200 employees | 40 | 23% | 26 | 24% | even |
| 201-500 employees | 23 | 13% | 20 | 18% | Junos OS |
| 501-1000 employees | 14 | 8% | 6 | 6% | Cisco IOS |
| 1001-5000 employees | 35 | 20% | 17 | 16% | Cisco IOS |
| 5001-10000 employees | 9 | 5% | 6 | 6% | even |
| 10,001+ employees | 20 | 11% | 11 | 10% | even |
| Segment | Cisco IOS | share | Junos OS | share | Leans |
|---|---|---|---|---|---|
| Technology & software | 77 | 44% | 64 | 59% | Junos OS |
| Manufacturing & industry | 25 | 14% | 12 | 11% | Cisco IOS |
| Business & finance services | 21 | 12% | 7 | 6% | Cisco IOS |
| Utilities & infrastructure | 14 | 8% | 15 | 14% | Junos OS |
| Consumer services & leisure | 10 | 6% | 3 | 3% | Cisco IOS |
| Public, community & associations | 9 | 5% | 3 | 3% | Cisco IOS |
| Health care | 5 | 3% | 2 | 2% | even |
| Property & construction | 5 | 3% | – | – | outside top 12 |
| Transport, logistics & rental | 4 | 2% | – | – | outside top 12 |
| Media & content | 3 | 2% | 2 | 2% | even |
| Commerce & trade | 2 | 1% | 1 | 1% | even |
| Segment | Cisco IOS | share | Junos OS | share | Leans |
|---|---|---|---|---|---|
| United States | 137 | 78% | 83 | 76% | Cisco IOS |
| Germany | 8 | 5% | 4 | 4% | even |
| United Kingdom | 7 | 4% | 7 | 6% | Junos OS |
| Switzerland | 3 | 2% | 1 | 1% | even |
| Canada | 2 | 1% | – | – | outside top 12 |
| India | 2 | 1% | 1 | 1% | even |
| Netherlands | 2 | 1% | 1 | 1% | even |
| Portugal | 2 | 1% | – | – | outside top 12 |
| Denmark | 1 | 1% | – | – | outside top 12 |
| France | 1 | 1% | 1 | 1% | even |
| GH | 1 | 1% | – | – | outside top 12 |
| Greece | 1 | 1% | – | – | outside top 12 |
| Australia | – | – | 4 | 4% | outside top 12 |
| Poland | – | – | 2 | 2% | outside top 12 |
| Czechia | – | – | 1 | 1% | outside top 12 |
| Mexico | – | – | 1 | 1% | outside top 12 |
| Singapore | – | – | 1 | 1% | outside top 12 |
| Segment | Cisco IOS | share | Junos OS | share | Leans |
|---|---|---|---|---|---|
| IT operations & business systems | 497 | 73% | 359 | 62% | Cisco IOS |
| Engineering (non-software) | 32 | 5% | 20 | 3% | even |
| Software engineering | 29 | 4% | 56 | 10% | Junos OS |
| Skilled trades and field service | 13 | 2% | 4 | 1% | even |
| Sales | 8 | 1% | 29 | 5% | Junos OS |
| Customer service & success | 7 | 1% | 15 | 3% | even |
| Administration & office | 1 | 0% | 1 | 0% | even |
| Data & AI | 1 | 0% | – | – | outside top 12 |
| Education & training | 1 | 0% | 1 | 0% | even |
| Facilities cleaning and security | 1 | 0% | – | – | outside top 12 |
| Finance & accounting | 1 | 0% | – | – | outside top 12 |
| General management & consulting | 1 | 0% | 2 | 0% | even |
| Product, program & project management | – | – | 2 | 0% | outside top 12 |
| Quality, safety & environment | – | – | 2 | 0% | outside top 12 |
| Agriculture and environment | – | – | 1 | 0% | outside top 12 |
The companies behind each column
Companies using Cisco IOS →
Companies using Junos OS →
routing switching wireless ranked →
Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.
Junos OS is named by 109 companies in job postings and Cisco IOS by 175; 64 name both. (Breaknorm, 30 October 2026, https://breaknorm.co/compare/cisco-ios-vs-juniper-junos)
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.
Cisco IOS vs Junos OS: questions
Which is more used, Cisco IOS or Junos OS?
By companies naming it in their own job postings, Cisco IOS (175) over Junos OS (109). By website-and-DNS footprint, Junos OS (0 vs 0), because its scripts and mail records sit on many small company sites.
Who chooses Cisco IOS?
42% of Cisco IOS companies have 2 to 200 employees, against 44% for Junos OS. 37% of Cisco IOS companies have over 1,000 employees, against 31% for Junos OS.
Do companies run both?
64 companies name both in their postings, usually Cisco IOS in marketing and Junos OS 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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