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 · Markdown version
Which companies name OpenAI Codex in the most job posts?
What else do we know about OpenAI Codex?
Is hiring for OpenAI Codex growing?
Show the data
| Month | Job posts naming OpenAI Codex | All job posts | Per 10,000 |
|---|---|---|---|
| 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?
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?
12,212 companies. Each is counted once, under the strongest evidence we have for it.
What size are the companies that use OpenAI Codex?
Share of its companies Typical tech page
Where are OpenAI Codex companies based?
Companies in 131 countries and territories. Shares are of companies with a known headquarters country.
Show the data
| 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?
What else do OpenAI Codex companies use?
Share of the 4,656 OpenAI Codex companies counted here whose job posts also name the tool Typical for companies the same size
Which companies started naming OpenAI Codex in job posts recently?
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.
Which roles mention OpenAI Codex most?
Show the data
| 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 project themes come up in OpenAI Codex job posts?
"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, 2026About 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.