# Companies using OpenAI Codex

We found 12,212 companies that use OpenAI Codex. 5,667 of them name it in their own job posts, and the rest through employees' public profiles. Its share of job posts jumped in the three months to August 2026, with 9,056 job posts naming it from October 2025 to August 2026. Software Engineer is the role that names it most often.

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

## Which companies name OpenAI Codex in the most job posts?

The companies with the most job posts naming OpenAI Codex are Cisco (180), Salesforce (147) and OpenAI (138). Salesforce is the newest of the five companies in the table, with its first job post naming it in April 2026.

| Company | Job posts | People | Recent job post |
|---|---:|---:|---|
| [Cisco](https://sumble.com/orgs/cisco-systems) | 180 | 79 | "Leverage AI coding assistants (GitHub Copilot, OpenAI Codex) to accelerate code generation, automate repetitive scripts, and build reusable platform tools." (Senior Cloud Platform Engineer – Python, Kubernetes, Terraform, Nov 7, 2026) |
| [Salesforce](https://sumble.com/orgs/salesforce) | 147 | 13 | "Use AI development tools such as Claude Code, GitHub Copilot, Codex, or Cursor to improve development velocity, testing, debugging, and documentation." (Software Engineering LMTS, Nov 7, 2026) |
| [OpenAI](https://sumble.com/orgs/openai) | 138 | 48 | "You will design and deliver technical learning experiences covering OpenAI APIs, Codex, agents, evaluations, and related platform capabilities." (ai deployment manager - builder, Nov 7, 2026) |
| [Booz Allen Hamilton](https://sumble.com/orgs/booz-allen-hamilton) | 125 | 2 | "Experience safely and effectively leveraging AI tools such as Claude code or Codex to support security testing engagements" (Red Team Operator, Senior, Nov 6, 2026) |
| [Oracle](https://sumble.com/orgs/oracle) | 102 | 338 | "Apply Codex and AI-Assisted Development: Use Codex and related tools to accelerate automation development, prototyping, testing, and documentation." (Principal Technical Program Manager, Nov 3, 2026) |

## Is hiring for OpenAI Codex growing?

Hiring for OpenAI Codex is climbing fast. 9.5 in every 10,000 job posts named it from June to August 2026, up from 5.3 from March to May. August 2026 was its highest month since October 2025, at 10.

| Month | Job posts naming it | All job posts | Per 10,000 job posts |
|---|---:|---:|---:|
| Oct 2025 | 120 | 1,413,673 | 0.85 |
| Nov 2025 | 145 | 1,822,119 | 0.80 |
| Dec 2025 | 108 | 1,236,103 | 0.87 |
| Jan 2026 | 196 | 1,828,002 | 1.1 |
| Feb 2026 | 371 | 1,856,647 | 2.0 |
| Mar 2026 | 631 | 1,850,711 | 3.4 |
| Apr 2026 | 874 | 1,728,886 | 5.1 |
| May 2026 | 1,339 | 1,821,509 | 7.4 |
| Jun 2026 | 1,597 | 1,909,496 | 8.4 |
| Jul 2026 | 1,785 | 1,815,180 | 9.8 |
| Aug 2026 | 1,890 | 1,835,698 | 10 |

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

1,899 companies named OpenAI Codex in a job post for the first time from June to August 2026, against 1,290 from March to May. That brings the companies naming it for the first time since October 2025 to 3,649, through August 2026.

| Period | Companies naming it in a job post for the first time |
|---|---:|
| March to May 2026 | 1,290 |
| June to August 2026 | 1,899 |
| October 2025 to August 2026 | 3,649 |

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 OpenAI Codex?

5,667 of the 12,212 companies name OpenAI Codex in their own job posts. The other 6,545 show up because employees list it on their profiles. 890 show up in both job posts and employees' profiles.

| How we know | Companies | Share |
|---|---:|---:|
| Job posts name OpenAI Codex | 5,667 | 46% |
| Employees' profiles list OpenAI Codex | 6,545 | 54% |

## What size are the companies that use OpenAI Codex?

Companies with fewer than 50 employees are 1.5 times as common among OpenAI Codex users as on the typical tech page. 1,368 of its companies have more than 5,000 employees.

| Size | Share | Typical tech page |
|---|---:|---:|
| Under 50 employees | 32% | 22% |
| 50 to 999 | 44% | 38% |
| 1,000 to 5,000 | 14% | 17% |
| Over 5,000 | 11% | 23% |

## Where are OpenAI Codex companies based?

The United States alone has 42% of OpenAI Codex companies; the rest are spread across 130 other countries and territories.

| Country | Companies | Share | Typical tech page |
|---|---:|---:|---:|
| United States | 4,840 | 42% | 43% |
| United Kingdom | 674 | 5.8% | 6.4% |
| Germany | 605 | 5.2% | 4.4% |
| India | 585 | 5% | 6.9% |
| France | 421 | 3.6% | 4.6% |
| Brazil | 371 | 3.2% | 2.8% |

## Which teams work with OpenAI Codex?

Engineering teams are by far the most common home for OpenAI Codex, at 83 companies. IT teams are second, at 41 companies, and product teams third, at 31.

| Team | Companies |
|---|---:|
| Engineering | 83 |
| IT | 41 |
| Product | 31 |
| Technology | 26 |
| Data science | 24 |
| AI | 22 |

## Which roles mention OpenAI Codex most?

Product Manager job posts naming OpenAI Codex grew the fastest among its top roles: 149 from June to August 2026, up from 60 from March to May. The top four roles cover 45% of these job posts.

| Role | Share | Oct 2025 to Aug 2026 | Mar to May 2026 | Jun to Aug 2026 |
|---|---:|---:|---:|---:|
| Software Engineer | 25% | 2,284 | 683 | 1,264 |
| AI Engineer | 15% | 1,356 | 410 | 774 |
| Product Manager | 2.5% | 223 | 60 | 149 |
| Engineer | 2.4% | 218 | 77 | 118 |
| Software Development Engineer in Test | 2.1% | 194 | 64 | 103 |
| Forward Deployed Engineer | 2% | 178 | 54 | 120 |

## Which companies started naming OpenAI Codex in job posts recently?

1,853 companies with 50 or more employees started naming OpenAI Codex in job posts between April and August 2026. 339 of them have more than 5,000 employees. Another 141 were AI-native companies, which we list separately.

| Group | Company | Job posts, April to August 2026 |
|---|---|---:|
| AI native | [Relevance AI](https://sumble.com/orgs/onsearch-io) | 11 |
| AI native | [Xapien](https://sumble.com/orgs/digital-insight-technologies) | 7 |
| AI native | [xhawk](https://sumble.com/orgs/xhawk) | 6 |
| AI native | [Buildots](https://sumble.com/orgs/buildots) | 5 |
| AI native | [Seekr](https://sumble.com/orgs/ntent) | 5 |
| Commercial | [ELMO Software](https://sumble.com/orgs/elmo-software) | 23 |
| Commercial | [Newpage Solutions](https://sumble.com/orgs/newpage-digital-healthcare-solutions) | 15 |
| Commercial | [Embrace Software Inc](https://sumble.com/orgs/embrace-software-inc) | 13 |
| Commercial | [zollsoft GmbH](https://sumble.com/orgs/zollsoft) | 11 |
| Commercial | [CSL Plasma](https://sumble.com/orgs/csl-plasma) | 11 |
| Mid-market | [OKX](https://sumble.com/orgs/okx) | 15 |
| Mid-market | [Celonis](https://sumble.com/orgs/celonis) | 15 |
| Mid-market | [Circle](https://sumble.com/orgs/circle-internet-financial-3) | 15 |
| Mid-market | [Redcare Pharmacy](https://sumble.com/orgs/redcare-pharmacy) | 15 |
| Mid-market | [Everbridge](https://sumble.com/orgs/everbridge) | 13 |
| Enterprise | [Salesforce](https://sumble.com/orgs/salesforce) | 101 |
| Enterprise | [Persistent Systems](https://sumble.com/orgs/persistent-systems) | 30 |
| Enterprise | [Infinite Computer Solutions](https://sumble.com/orgs/infinite-computer-solution) | 29 |
| Enterprise | [GlobalLogic](https://sumble.com/orgs/globallogic) | 25 |
| Enterprise | [State Street](https://sumble.com/orgs/state-street) | 13 |

Companies that named OpenAI Codex 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 OpenAI Codex companies use?

Claude Code, Windsurf and Clay show up far more often at OpenAI Codex companies than at companies of the same size. Next is Linear: 5.4% of these companies use it, against 0.43% of similar ones.

| Tool | Companies | Also name it | Typical | Times as common |
|---|---:|---:|---:|---:|
| Claude Code | 3,501 | 75% | 2.6% | 28 times |
| Windsurf | 256 | 5.5% | 0.27% | 20 times |
| Clay | 411 | 8.8% | 0.68% | 13 times |
| Linear | 252 | 5.4% | 0.43% | 13 times |
| Vercel | 375 | 8.1% | 0.64% | 13 times |
| LangSmith | 244 | 5.2% | 0.44% | 12 times |
| pgvector | 315 | 6.8% | 0.6% | 11 times |
| Rippling | 251 | 5.4% | 0.48% | 11 times |

Shares are out of the 4,656 companies whose job posts name OpenAI Codex, not counting firms whose job posts name almost every technology.

## Which project themes come up in OpenAI Codex job posts?

Generative AI comes up most in job posts naming OpenAI Codex, in 2,117 of them. Apart from broad digital transformation work, Data Infrastructure Migration comes next, with 382.

| Project theme | Job posts |
|---|---:|
| Generative AI | 2,117 |
| Digital Transformation | 2,002 |
| Data Infrastructure Migration | 382 |
| Microservices Migration | 326 |

- "You use tools such as Claude Code and Codex in your day-to-day work to prototype, build, and ship" (UiPath, Senior Manager, Product Design, Nov 8, 2026)

## 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.