ARM Cortex-M VS ESP32
As of 4 November 2026, ESP32 is named by 220 companies and ARM Cortex-M by 254; ARM Cortex-M skews to companies under 200 people (51% vs 62%), ESP32 to companies over 1,000 (19% vs 29%).
As of 4 November 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: ARM Cortex-M's script and mail records show on hundreds of thousands of small sites, ESP32 rarely leaves a trace outside its own apps. Compare on the job-posting numbers; use the footprint for reach.
- ARM Cortex-M: 2–200 employees
- 51%
- ESP32: 2–200 employees
- 62%
- ARM Cortex-M: 1,000+ employees
- 29%
- ESP32: 1,000+ employees
- 19%
- Postings per company, 90 days
- 1.8 · 1.6
- 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 | ARM Cortex-M | share | ESP32 | share | Leans |
|---|---|---|---|---|---|
| Self-employed | 7 | 3% | 7 | 3% | even |
| 2-10 employees | 32 | 13% | 33 | 15% | ESP32 |
| 11-50 employees | 36 | 14% | 55 | 25% | ESP32 |
| 51-200 employees | 62 | 24% | 49 | 22% | ARM Cortex-M |
| 201-500 employees | 31 | 12% | 23 | 10% | even |
| 501-1000 employees | 13 | 5% | 11 | 5% | even |
| 1001-5000 employees | 38 | 15% | 25 | 11% | ARM Cortex-M |
| 5001-10000 employees | 11 | 4% | 7 | 3% | even |
| 10,001+ employees | 24 | 9% | 10 | 5% | ARM Cortex-M |
| Segment | ARM Cortex-M | share | ESP32 | share | Leans |
|---|---|---|---|---|---|
| Manufacturing & industry | 141 | 56% | 76 | 35% | ARM Cortex-M |
| Technology & software | 45 | 18% | 57 | 26% | ESP32 |
| Business & finance services | 27 | 11% | 26 | 12% | even |
| Commerce & trade | 10 | 4% | 15 | 7% | ESP32 |
| Utilities & infrastructure | 8 | 3% | 5 | 2% | even |
| Automotive | 7 | 3% | 8 | 4% | even |
| Public, community & associations | 6 | 2% | 7 | 3% | even |
| Consumer services & leisure | 5 | 2% | 15 | 7% | ESP32 |
| Property & construction | 2 | 1% | 4 | 2% | even |
| Transport, logistics & rental | 2 | 1% | – | – | outside top 12 |
| Health care | 1 | 0% | – | – | outside top 12 |
| Media & content | – | – | 4 | 2% | outside top 12 |
| Agriculture & forestry | – | – | 3 | 1% | outside top 12 |
| Segment | ARM Cortex-M | share | ESP32 | share | Leans |
|---|---|---|---|---|---|
| United States | 146 | 57% | 96 | 44% | ARM Cortex-M |
| Germany | 26 | 10% | 25 | 11% | even |
| United Kingdom | 12 | 5% | 6 | 3% | even |
| France | 11 | 4% | 5 | 2% | ARM Cortex-M |
| India | 7 | 3% | 22 | 10% | ESP32 |
| Australia | 5 | 2% | 3 | 1% | even |
| Sweden | 5 | 2% | – | – | outside top 12 |
| Spain | 4 | 2% | 6 | 3% | even |
| Canada | 3 | 1% | 4 | 2% | even |
| Netherlands | 3 | 1% | 3 | 1% | even |
| Poland | 3 | 1% | 6 | 3% | even |
| United Arab Emirates | 2 | 1% | – | – | outside top 12 |
| Switzerland | – | – | 4 | 2% | outside top 12 |
| Italy | – | – | 3 | 1% | outside top 12 |
| Segment | ARM Cortex-M | share | ESP32 | share | Leans |
|---|---|---|---|---|---|
| Software engineering | 442 | 73% | 209 | 36% | ARM Cortex-M |
| Engineering (non-software) | 89 | 15% | 128 | 22% | ESP32 |
| IT operations & business systems | 18 | 3% | 17 | 3% | even |
| Data & AI | 5 | 1% | 12 | 2% | even |
| Sales | 4 | 1% | 3 | 1% | even |
| Customer service & success | 2 | 0% | 2 | 0% | even |
| Product, program & project management | 2 | 0% | 6 | 1% | even |
| Design & UX | 1 | 0% | 5 | 1% | even |
| Quality, safety & environment | 1 | 0% | 2 | 0% | even |
| Marketing & communications | – | – | 23 | 4% | outside top 12 |
| Finance & accounting | – | – | 16 | 3% | outside top 12 |
| Administration & office | – | – | 14 | 2% | outside top 12 |
| Arts media and entertainment | – | – | 8 | 1% | outside top 12 |
| Skilled trades and field service | – | – | 8 | 1% | outside top 12 |
| Research and science | – | – | 6 | 1% | outside top 12 |
| Education & training | – | – | 2 | 0% | outside top 12 |
| Unclassified | – | – | 2 | 0% | outside top 12 |
| Logistics warehouse and transport | – | – | 1 | 0% | outside top 12 |
| Manufacturing and production | – | – | 1 | 0% | outside top 12 |
| Real estate and property | – | – | 1 | 0% | outside top 12 |
The companies behind each column
Companies using ARM Cortex-M →
Companies using ESP32 →
embedded boards ranked →
Quote the sentence with the date and the link. The numbers change daily; the link always shows the current ones.
ESP32 is named by 220 companies in job postings and ARM Cortex-M by 254; 27 name both. (Breaknorm, 4 November 2026, https://breaknorm.co/compare/arm-cortex-m-vs-esp32)
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.
ARM Cortex-M vs ESP32: questions
Which is more used, ARM Cortex-M or ESP32?
By companies naming it in their own job postings, ARM Cortex-M (254) over ESP32 (220). By website-and-DNS footprint, ESP32 (0 vs 0), because its scripts and mail records sit on many small company sites.
Who chooses ARM Cortex-M?
51% of ARM Cortex-M companies have 2 to 200 employees, against 62% for ESP32. 29% of ARM Cortex-M companies have over 1,000 employees, against 19% for ESP32.
Do companies run both?
27 companies name both in their postings, usually ARM Cortex-M in marketing and ESP32 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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