HAProxy VS Microsoft IIS
As of 30 October 2026, Microsoft IIS is named by 930 companies and HAProxy by 183; HAProxy skews to companies under 200 people (48% vs 42%), Microsoft IIS to companies over 1,000 (34% vs 25%).
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: HAProxy's script and mail records show on hundreds of thousands of small sites, Microsoft IIS rarely leaves a trace outside its own apps. Compare on the job-posting numbers; use the footprint for reach.
- HAProxy: 2–200 employees
- 48%
- Microsoft IIS: 2–200 employees
- 42%
- HAProxy: 1,000+ employees
- 25%
- Microsoft IIS: 1,000+ employees
- 34%
- Postings per company, 90 days
- 2.0 · 2.2
- 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 | HAProxy | share | Microsoft IIS | share | Leans |
|---|---|---|---|---|---|
| Self-employed | 3 | 2% | 8 | 1% | even |
| 2-10 employees | 11 | 6% | 47 | 5% | even |
| 11-50 employees | 43 | 23% | 154 | 17% | HAProxy |
| 51-200 employees | 34 | 19% | 185 | 20% | even |
| 201-500 employees | 32 | 17% | 135 | 15% | HAProxy |
| 501-1000 employees | 14 | 8% | 86 | 9% | even |
| 1001-5000 employees | 25 | 14% | 154 | 17% | Microsoft IIS |
| 5001-10000 employees | 8 | 4% | 49 | 5% | even |
| 10,001+ employees | 13 | 7% | 112 | 12% | Microsoft IIS |
| Segment | HAProxy | share | Microsoft IIS | share | Leans |
|---|---|---|---|---|---|
| Technology & software | 122 | 67% | 494 | 53% | HAProxy |
| Business & finance services | 27 | 15% | 185 | 20% | Microsoft IIS |
| Manufacturing & industry | 7 | 4% | 86 | 9% | Microsoft IIS |
| Consumer services & leisure | 5 | 3% | 19 | 2% | even |
| Media & content | 5 | 3% | 19 | 2% | even |
| Transport, logistics & rental | 5 | 3% | 15 | 2% | even |
| Utilities & infrastructure | 4 | 2% | 19 | 2% | even |
| Commerce & trade | 3 | 2% | 17 | 2% | even |
| Automotive | 2 | 1% | 7 | 1% | even |
| Public, community & associations | 2 | 1% | 32 | 3% | Microsoft IIS |
| Property & construction | 1 | 1% | 14 | 2% | even |
| Health care | – | – | 20 | 2% | outside top 12 |
| Segment | HAProxy | share | Microsoft IIS | share | Leans |
|---|---|---|---|---|---|
| United States | 94 | 51% | 566 | 61% | Microsoft IIS |
| France | 16 | 9% | 43 | 5% | HAProxy |
| United Kingdom | 15 | 8% | 44 | 5% | HAProxy |
| Germany | 11 | 6% | 39 | 4% | even |
| Switzerland | 5 | 3% | 11 | 1% | even |
| Italy | 4 | 2% | 20 | 2% | even |
| Czechia | 3 | 2% | – | – | outside top 12 |
| Estonia | 3 | 2% | – | – | outside top 12 |
| Poland | 3 | 2% | 14 | 2% | even |
| Austria | 2 | 1% | – | – | outside top 12 |
| Belgium | 2 | 1% | – | – | outside top 12 |
| Brazil | 2 | 1% | 11 | 1% | even |
| Canada | – | – | 28 | 3% | outside top 12 |
| India | – | – | 24 | 3% | outside top 12 |
| Australia | – | – | 13 | 1% | outside top 12 |
| Singapore | – | – | 12 | 1% | outside top 12 |
| Segment | HAProxy | share | Microsoft IIS | share | Leans |
|---|---|---|---|---|---|
| Software engineering | 258 | 46% | 1,178 | 34% | HAProxy |
| IT operations & business systems | 214 | 38% | 1,230 | 35% | HAProxy |
| Engineering (non-software) | 17 | 3% | 118 | 3% | even |
| Logistics warehouse and transport | 6 | 1% | – | – | outside top 12 |
| Customer service & success | 4 | 1% | 164 | 5% | Microsoft IIS |
| Data & AI | 3 | 1% | 97 | 3% | Microsoft IIS |
| Marketing & communications | 3 | 1% | 8 | 0% | even |
| Product, program & project management | 3 | 1% | 62 | 2% | even |
| Hospitality and food service | 2 | 0% | – | – | outside top 12 |
| Construction and civil | 1 | 0% | – | – | outside top 12 |
| Skilled trades and field service | 1 | 0% | – | – | outside top 12 |
| Unclassified | 1 | 0% | – | – | outside top 12 |
| Sales | – | – | 44 | 1% | outside top 12 |
| Research and science | – | – | 24 | 1% | outside top 12 |
| General management & consulting | – | – | 14 | 0% | outside top 12 |
| Legal, compliance & risk | – | – | 9 | 0% | outside top 12 |
| Healthcare support and caregiving | – | – | 7 | 0% | outside top 12 |
The companies behind each column
Companies using HAProxy →
Companies using Microsoft IIS →
web app servers ranked →
Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.
Microsoft IIS is named by 930 companies in job postings and HAProxy by 183; 21 name both. (Breaknorm, 30 October 2026, https://breaknorm.co/compare/haproxy-vs-microsoft-iis)
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.
HAProxy vs Microsoft IIS: questions
Which is more used, HAProxy or Microsoft IIS?
By companies naming it in their own job postings, Microsoft IIS (930) over HAProxy (183). By website-and-DNS footprint, Microsoft IIS (0 vs 0), because its scripts and mail records sit on many small company sites.
Who chooses HAProxy?
48% of HAProxy companies have 2 to 200 employees, against 42% for Microsoft IIS. 25% of HAProxy companies have over 1,000 employees, against 34% for Microsoft IIS.
Do companies run both?
21 companies name both in their postings, usually HAProxy in marketing and Microsoft IIS 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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