# Companies using CircleCI

We found 19,701 companies that use CircleCI. 10,622 of them name it in their own job posts, and the rest through employees' public profiles. Hiring for it has slowed, though 8,471 job posts still named it from October 2025 to August 2026. Engineering teams are its most common home.

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

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

Sansan株式会社 has posted more jobs naming CircleCI than any other company: 864. Of the five companies in the table, EPAM Systems has the most employees who list it on their profiles: 90.

| Company | Job posts | People | Recent job post |
|---|---:|---:|---|
| [Sansan株式会社](https://sumble.com/orgs/sansan株式会社) | 864 | 0 | "利用ツール・サービス/Docker、 Terraform、 GitHub、 CircleCI、 Datadog、 Opsgenie、 Sentry" (Web application development engineer [digitization], Aug 16, 2026) |
| [EPAM Systems](https://sumble.com/orgs/epam-systems) | 657 | 90 | "Use build tools like Gradle, GitHub Actions and Circle CI and apply continuous integration patterns" (Android Engineer (Contractor), Oct 22, 2026) |
| [CVS Health](https://sumble.com/orgs/cvs-health) | 545 | 73 | "Drive adoption of CI/CD, DevOps, and automated testing practices using modern tooling (GitHub, Jenkins, CircleCI, Harness)" (Staff Software Engineer - Search / AI, Sep 26, 2026) |
| [Citi](https://sumble.com/orgs/citi) | 433 | 16 | "Familiarity with CI/CD pipeline tooling such as Tekton, Harness, CircleCI, or Jenkins, in either on-premise or public cloud environments." (Principal Engineer – Vice President, Nov 7, 2026) |
| [Chatwork](https://sumble.com/orgs/chatwork) | 424 | 0 | "CI/CD: CircleCI, GitHub Actions, Jenkins" (Engineer/Open position/Full remote/Experienced people welcome/No transfers, Jun 14, 2024) |

## Is hiring for CircleCI growing?

Hiring for CircleCI has slowed. 3.2 in every 10,000 job posts named it from June to August 2026, against 4.1 from March to May. From October to December 2025 it was 5.8.

| Month | Job posts naming it | All job posts | Per 10,000 job posts |
|---|---:|---:|---:|
| Oct 2025 | 828 | 1,413,673 | 5.9 |
| Nov 2025 | 1,045 | 1,822,119 | 5.7 |
| Dec 2025 | 713 | 1,236,103 | 5.8 |
| Jan 2026 | 972 | 1,828,002 | 5.3 |
| Feb 2026 | 903 | 1,856,647 | 4.9 |
| Mar 2026 | 798 | 1,850,711 | 4.3 |
| Apr 2026 | 766 | 1,728,886 | 4.4 |
| May 2026 | 668 | 1,821,509 | 3.7 |
| Jun 2026 | 661 | 1,909,496 | 3.5 |
| Jul 2026 | 561 | 1,815,180 | 3.1 |
| Aug 2026 | 556 | 1,835,698 | 3.0 |

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

Job posts named CircleCI for the first time at 186 companies from June to August 2026, against 222 from March to May. Of the 10,622 companies whose job posts name it, 1.8% first named it from June to August.

| Period | Companies naming it in a job post for the first time |
|---|---:|
| March to May 2026 | 222 |
| June to August 2026 | 186 |
| 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 CircleCI?

The evidence for CircleCI is close to even: 54% of these companies name it in job posts, and 46% come from employees' profiles. 2,336 show up in both job posts and employees' profiles.

| How we know | Companies | Share |
|---|---:|---:|
| Job posts name CircleCI | 10,622 | 54% |
| Employees' profiles list CircleCI | 9,079 | 46% |

## What size are the companies that use CircleCI?

Smaller companies stand out among CircleCI users: companies with fewer than 50 employees are 35% of them, against 22% on the typical tech page. 1,591 of its companies have more than 5,000 employees.

| Size | Share | Typical tech page |
|---|---:|---:|
| Under 50 employees | 35% | 22% |
| 50 to 999 | 45% | 38% |
| 1,000 to 5,000 | 11% | 17% |
| Over 5,000 | 8.1% | 23% |

## Where are CircleCI companies based?

CircleCI companies are spread across 138 countries and territories. The United States leads with 44%, then the United Kingdom with 8%. India is third, at 6.8%.

| Country | Companies | Share | Typical tech page |
|---|---:|---:|---:|
| United States | 7,959 | 44% | 43% |
| United Kingdom | 1,461 | 8% | 6.4% |
| India | 1,248 | 6.8% | 6.9% |
| Canada | 688 | 3.8% | 3.6% |
| France | 624 | 3.4% | 4.6% |
| Germany | 611 | 3.3% | 4.4% |

## Which teams work with CircleCI?

Job posts most often place CircleCI with engineering, DevOps and QA teams. Technology teams come fourth, at 115 companies.

| Team | Companies |
|---|---:|
| Engineering | 325 |
| DevOps | 263 |
| QA | 126 |
| Technology | 115 |
| Platform | 98 |
| Infrastructure | 93 |

## Which roles mention CircleCI most?

Software Engineer and DevOps Engineer roles account for 43% of the job posts that name CircleCI. The top four roles cover 56% of these job posts.

| Role | Share | Oct 2025 to Aug 2026 | Mar to May 2026 | Jun to Aug 2026 |
|---|---:|---:|---:|---:|
| Software Engineer | 26% | 2,183 | 542 | 395 |
| DevOps Engineer | 17% | 1,435 | 370 | 306 |
| Software Development Engineer in Test | 8.3% | 705 | 172 | 164 |
| Mobile Developer | 4.5% | 382 | 115 | 59 |
| Site Reliability Engineer | 4.1% | 351 | 96 | 73 |
| Platform Engineer | 3.1% | 265 | 68 | 63 |

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

199 companies with 50 or more employees picked up CircleCI in their job posts from April to August 2026. Another 14 were AI-native companies, which we list separately.

| Group | Company | Job posts, April to August 2026 |
|---|---|---:|
| AI native | [Xapien](https://sumble.com/orgs/digital-insight-technologies) | 4 |
| AI native | [Kubbly](https://sumble.com/orgs/kubbly) | 3 |
| AI native | [Abridge](https://sumble.com/orgs/abridgehq) | 2 |
| AI native | [Taiyo.AI](https://sumble.com/orgs/taiyo-ai) | 2 |
| AI native | [FieldAI](https://sumble.com/orgs/fieldai) | 1 |
| Commercial | [Midnite](https://sumble.com/orgs/midnite) | 4 |
| Commercial | [Zipline](https://sumble.com/orgs/retail-zipline) | 4 |
| Commercial | [Fellow](https://sumble.com/orgs/fellow) | 4 |
| Commercial | [Intralot](https://sumble.com/orgs/intralot) | 3 |
| Commercial | [Omega CRM, A Dentsu Company](https://sumble.com/orgs/omega-crm) | 3 |
| Mid-market | [HID](https://sumble.com/orgs/hid-global) | 5 |
| Mid-market | [Cambia Health Solutions](https://sumble.com/orgs/cambia-health-solutions) | 4 |
| Mid-market | [Rexall Pharmacy Group Ltd.](https://sumble.com/orgs/rexall) | 4 |
| Mid-market | [Brex](https://sumble.com/orgs/brex-5) | 4 |
| Mid-market | [WHOOP](https://sumble.com/orgs/whoop) | 4 |
| Enterprise | [Arup](https://sumble.com/orgs/arup) | 3 |
| Enterprise | [H&M](https://sumble.com/orgs/h&m) | 2 |
| Enterprise | [Bajaj Finserv](https://sumble.com/orgs/bajaj-finserv) | 1 |
| Enterprise | [Inspire](https://sumble.com/orgs/inspire-brands) | 1 |
| Enterprise | [WTW](https://sumble.com/orgs/wtw-3) | 1 |

Companies that named CircleCI 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 CircleCI companies use?

14% of CircleCI companies also use Travis CI, against 0.56% of similar companies. MobX is 13 times as common as usual, at 7.5%.

| Tool | Companies | Also name it | Typical | Times as common |
|---|---:|---:|---:|---:|
| Travis CI | 1,101 | 14% | 0.56% | 24 times |
| MobX | 605 | 7.5% | 0.56% | 13 times |
| Linkerd | 406 | 5% | 0.38% | 13 times |
| Locust | 409 | 5.1% | 0.4% | 13 times |
| GCP Cloud Monitoring | 414 | 5.1% | 0.41% | 12 times |
| WebdriverIO | 420 | 5.2% | 0.43% | 12 times |
| Sentry | 1,031 | 13% | 1.1% | 12 times |
| Mocha | 1,175 | 15% | 1.2% | 12 times |

Shares are out of the 8,054 companies whose job posts name CircleCI, not counting firms whose job posts name almost every technology.

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

Digital transformation is the broadest theme in CircleCI job posts (4,692); the most common specific one is Cloud Cost Optimization, at 1,886. Microservices Migration is next, in 1,246 job posts.

| Project theme | Job posts |
|---|---:|
| Digital Transformation | 4,692 |
| Cloud Cost Optimization | 1,886 |
| Microservices Migration | 1,246 |
| Data Infrastructure Migration | 792 |

## 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.