# Companies using FreeRTOS

We found 11,116 companies that use FreeRTOS. 4,174 of them name it in their own job posts, and the rest through employees' public profiles. Its share of job posts held steady in the three months to August 2026; 4,831 job posts named it from October 2025 to August 2026. Embedded Engineer roles mention it most.

Data as of November 9, 2026. Source: Sumble.

## Which companies name FreeRTOS in the most job posts?

Qualcomm, Altran and ADENTIS mention FreeRTOS in the most job posts. Of the five companies in the table, Qualcomm has the most employees who list it on their profiles: 317.

| Company | Job posts | People | Recent job post |
|---|---:|---:|---|
| [Qualcomm](https://sumble.com/orgs/qualcomm) | 344 | 317 | "Experience with Linux, Android, QNX, FreeRTOS, ThreadX, or Zephyr." (Performance Engineer, Staff, Nov 1, 2026) |
| [Altran](https://sumble.com/orgs/capgemini-engineering) | 188 | 83 | "Design, implement, and optimize firmware for RTOS-based applications (FreeRTOS or equivalent)." (Embedded C Firmware Developer, Nov 5, 2026) |
| [ADENTIS](https://sumble.com/orgs/adentis) | 170 | 2 | "Vous êtes familier d’OS temps réel (FreeRTOS) et des protocoles de communication (CAN, TCP/IP)." (embedded software engineer, Oct 27, 2026) |
| [Amazon](https://sumble.com/orgs/amazon) | 155 | 91 | "You will design, implement, and optimize software for real-time operating systems such as FreeRTOS, ThreadX, or Zephyr." (Senior Embedded Software Engineer , Fauna, Oct 24, 2026) |
| [NXP Semiconductors](https://sumble.com/orgs/nxp-semiconductors) | 141 | 91 | "Build and test secure key provisioning applications running on FreeRTOS and Zephyr RTOS." (Junior Embedded Software Engineer - Secure IoT Firmware (m/f/d), Oct 21, 2026) |

## Is hiring for FreeRTOS growing?

FreeRTOS's share of job posts is about the same as three months earlier: 2.7 in every 10,000 job posts from June to August 2026, against 2.6 from March to May. From October to December 2025 it was 2.3.

| Month | Job posts naming it | All job posts | Per 10,000 job posts |
|---|---:|---:|---:|
| Oct 2025 | 297 | 1,413,673 | 2.1 |
| Nov 2025 | 444 | 1,822,119 | 2.4 |
| Dec 2025 | 287 | 1,236,103 | 2.3 |
| Jan 2026 | 442 | 1,828,002 | 2.4 |
| Feb 2026 | 472 | 1,856,647 | 2.5 |
| Mar 2026 | 486 | 1,850,711 | 2.6 |
| Apr 2026 | 431 | 1,728,886 | 2.5 |
| May 2026 | 493 | 1,821,509 | 2.7 |
| Jun 2026 | 536 | 1,909,496 | 2.8 |
| Jul 2026 | 487 | 1,815,180 | 2.7 |
| Aug 2026 | 456 | 1,835,698 | 2.5 |

## How many companies named FreeRTOS in a job post for the first time in recent months?

Job posts named FreeRTOS for the first time at 266 companies from June to August 2026, against 242 from March to May. That brings the companies naming it for the first time since October 2025 to 899, through August 2026.

| Period | Companies naming it in a job post for the first time |
|---|---:|
| March to May 2026 | 242 |
| June to August 2026 | 266 |
| October 2025 to August 2026 | 899 |

Companies whose first job post naming it appeared in that period. Recruiters, staffing firms and job boards are left out.

## How do we know which companies use FreeRTOS?

We found 11,116 companies that use FreeRTOS, 6,942 of them through employees' profiles alone. 1,283 show up in both job posts and employees' profiles.

| How we know | Companies | Share |
|---|---:|---:|
| Job posts name FreeRTOS | 4,174 | 38% |
| Employees' profiles list FreeRTOS | 6,942 | 62% |

## What size are the companies that use FreeRTOS?

FreeRTOS skews toward smaller firms. 36% of its users are companies with fewer than 50 employees, against 22% on the typical tech page. 979 of its companies have more than 5,000 employees.

| Size | Share | Typical tech page |
|---|---:|---:|
| Under 50 employees | 36% | 22% |
| 50 to 999 | 43% | 38% |
| 1,000 to 5,000 | 12% | 17% |
| Over 5,000 | 8.8% | 23% |

## Where are FreeRTOS companies based?

Beyond the United States (29%), FreeRTOS is unusually common in Germany, at 7.2% of its companies. India is second, at 10%.

| Country | Companies | Share | Typical tech page |
|---|---:|---:|---:|
| United States | 3,106 | 29% | 43% |
| India | 1,070 | 10% | 6.9% |
| Germany | 767 | 7.2% | 4.4% |
| France | 697 | 6.6% | 4.6% |
| United Kingdom | 487 | 4.6% | 6.4% |
| Canada | 435 | 4.1% | 3.6% |

## Which teams work with FreeRTOS?

FreeRTOS job posts name R&D and engineering teams at 120 and 80 companies. Firmware teams follow, at 75 companies.

| Team | Companies |
|---|---:|
| R&D | 120 |
| Engineering | 80 |
| Firmware | 75 |
| Software | 55 |
| Embedded software | 51 |
| Product development | 29 |

## Which roles mention FreeRTOS most?

Embedded Engineer is the most common role, in 34% of job posts naming FreeRTOS. Embedded Engineer posts naming it numbered 438 from March to May 2026 and 506 from June to August.

| Role | Share | Oct 2025 to Aug 2026 | Mar to May 2026 | Jun to Aug 2026 |
|---|---:|---:|---:|---:|
| Embedded Engineer | 34% | 1,655 | 438 | 506 |
| Firmware Engineer | 28% | 1,346 | 405 | 409 |
| Software Engineer | 13% | 616 | 168 | 169 |
| Hardware Engineer | 1.4% | 66 | 17 | 14 |
| Software Development Engineer in Test | 1.3% | 61 | 21 | 21 |
| Product Security | 1.1% | 54 | 9 | 18 |

## Which companies started naming FreeRTOS in job posts recently?

222 companies with 50 or more employees started naming FreeRTOS in job posts between April and August 2026. 33 of them have more than 5,000 employees. Another 4 were AI-native companies, which we list separately.

| Group | Company | Job posts, April to August 2026 |
|---|---|---:|
| AI native | [Google DeepMind](https://sumble.com/orgs/deepmind) | 1 |
| AI native | [Deepgram](https://sumble.com/orgs/deepgram) | 1 |
| AI native | [Moray](https://sumble.com/orgs/moray-ai) | 1 |
| AI native | [Lodestar](https://sumble.com/orgs/lodestarspace) | 1 |
| Commercial | [Canaan Inc.](https://sumble.com/orgs/canaan-creative-global) | 7 |
| Commercial | [slashwhy](https://sumble.com/orgs/slashwhy-gmbh-&-co-kg) | 6 |
| Commercial | [ADASI](https://sumble.com/orgs/adasi) | 5 |
| Commercial | [ZURU Tech](https://sumble.com/orgs/zuru-tech) | 5 |
| Commercial | [Command Post Technologies, Inc](https://sumble.com/orgs/command-post-technologies) | 5 |
| Mid-market | [WNC Corporation](https://sumble.com/orgs/w-neweb) | 8 |
| Mid-market | [Franklin Electric](https://sumble.com/orgs/franklin-electric) | 6 |
| Mid-market | [Bosch Romania](https://sumble.com/orgs/boschromania) | 4 |
| Mid-market | [Wissen Technology](https://sumble.com/orgs/wissen-technology-private-limited) | 3 |
| Mid-market | [Cubic Transportation Systems](https://sumble.com/orgs/cubictransportationsystems) | 3 |
| Enterprise | [Uber](https://sumble.com/orgs/uber) | 5 |
| Enterprise | [PwC India](https://sumble.com/orgs/pwc-india) | 5 |
| Enterprise | [Marmon Holdings, Inc.](https://sumble.com/orgs/marmon-group) | 5 |
| Enterprise | [Ericsson](https://sumble.com/orgs/ericsson) | 4 |
| Enterprise | [Alliant Insurance Services](https://sumble.com/orgs/alliant-insurance-services) | 4 |

Companies that named FreeRTOS in a job post for the first time between April and August 2026, ranked by their job posts in those months. AI-native companies get a group of their own, whatever their size. Recruiters and job boards are left out.

## What else do FreeRTOS companies use?

9.7% of FreeRTOS companies also use ThreadX, against 0.08% of similar companies. Next is VxWorks: 13% of these companies use it, against 0.18% of similar ones.

| Tool | Companies | Also name it | Typical | Times as common |
|---|---:|---:|---:|---:|
| ThreadX | 311 | 9.7% | 0.08% | 127 times |
| VxWorks | 433 | 13% | 0.18% | 75 times |
| ARM Cortex | 233 | 7.2% | 0.11% | 68 times |
| Buildroot | 419 | 13% | 0.2% | 66 times |
| STM32 | 1,049 | 33% | 0.5% | 66 times |
| ESP32 | 586 | 18% | 0.29% | 63 times |
| UART | 1,984 | 62% | 1.2% | 53 times |
| LVDS | 220 | 6.8% | 0.13% | 53 times |

Shares are out of the 3,215 companies whose job posts name FreeRTOS, not counting firms whose job posts name almost every technology.

## Which project themes come up in FreeRTOS job posts?

Apart from broad digital transformation work, Microservices Migration comes up most in job posts naming FreeRTOS, in 11 of them. Generative AI is next, in 8 job posts.

| Project theme | Job posts |
|---|---:|
| Digital Transformation | 350 |
| Microservices Migration | 11 |
| Generative AI | 8 |
| Cloud Cost Optimization | 5 |

## About this data

Sumble built this page. Sumble gives sales, marketing and other GTM teams technographics and hiring signals for the companies they sell to: the technologies each company uses, which teams are hiring and for what, and who reports to whom. That helps a team know who to contact, why now, and what to say.

Sumble covers more than 3.6 million companies, 93 million job posts collected since 2022 and 194 million employee profiles, and tracks more than 37,000 technologies. It finds which technologies a company uses by reading its job posts and its employees' public profiles.

Sumble has a free plan, and the same data is available through its API and MCP server.

A company counts when its own job posts or its employees' public profiles name the technology. Hiring is that technology's share of all job posts collected each month. Quotes are copied word for word from the companies' job posts.

Every figure on this page comes from Sumble's own analysis, and you won't find it outside Sumble.