# Companies using Promptfoo

606 companies in our data use Promptfoo, and 401 of them name it in job posts they wrote. From October 2025 to August 2026, 454 job posts named it. It comes up most in AI Engineer job posts.

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

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

10a Labs, EY and NCS Group are among the companies with the most job posts naming Promptfoo. Four of these five companies are in Professional Services.

| Company | Job posts | Recent job post |
|---|---:|---|
| [10a Labs](https://sumble.com/orgs/10a-labs) | 15 | "Experience with prompt-automation frameworks (e.g., Promptfoo, LangChain, Garak)." (AI Red Teamer, Apr 28, 2026) |
| [EY](https://sumble.com/orgs/ey) | 14 | "Knowledge of tools/framework like Deep eval, RAGAS and PromptFoo" (TTT-Automation testing-AI-Tax Senior, Oct 21, 2026) |
| [NCS Group](https://sumble.com/orgs/ncs-58f32852) | 13 | "Evaluation Frameworks: Utilize Promptfoo and RAGAs for evaluating LLM outputs." (Artificial Intelligence Engineer, Jun 2, 2026) |
| [EPAM Systems](https://sumble.com/orgs/epam-systems) | 12 | "Knowledge of LLM observability platforms such as Langfuse or Promptfoo for tracing, evaluating and monitoring LLM behavior" (Lead Python Developer, Jun 16, 2026) |
| [Uber](https://sumble.com/orgs/uber) | 12 | "Familiarity with AI security tools and frameworks (e.g., PyRIT, AgentDojo, Promptfoo, custom harnesses)." (Senior Security Engineer (AI & Agentic Systems), May 2, 2026) |

## Is hiring for Promptfoo growing?

From March to May 2026, 0.25 in every 10,000 job posts named Promptfoo; from June to August, 0.40 in every 10,000 job posts. These are small numbers of job posts, so a few companies can move them.

| Month | Job posts naming it | All job posts | Per 10,000 job posts |
|---|---:|---:|---:|
| Oct 2025 | 10 | 1,413,673 | 0.07 |
| Nov 2025 | 19 | 1,822,119 | 0.10 |
| Dec 2025 | 13 | 1,236,103 | 0.11 |
| Jan 2026 | 23 | 1,828,002 | 0.13 |
| Feb 2026 | 34 | 1,856,647 | 0.18 |
| Mar 2026 | 29 | 1,850,711 | 0.16 |
| Apr 2026 | 37 | 1,728,886 | 0.21 |
| May 2026 | 69 | 1,821,509 | 0.38 |
| Jun 2026 | 81 | 1,909,496 | 0.42 |
| Jul 2026 | 74 | 1,815,180 | 0.41 |
| Aug 2026 | 65 | 1,835,698 | 0.35 |

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

114 companies named Promptfoo in a job post for the first time from June to August 2026, against 59 from March to May. From October 2025 to August 2026, 227 companies named it in a job post for the first time.

| Period | Companies naming it in a job post for the first time |
|---|---:|
| March to May 2026 | 59 |
| June to August 2026 | 114 |
| October 2025 to August 2026 | 227 |

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 Promptfoo?

401 of the 606 companies name Promptfoo in their own job posts. 205 come from employees' profiles alone.

| How we know | Companies | Share |
|---|---:|---:|
| Job posts name Promptfoo | 401 | 66% |
| Employees' profiles list Promptfoo | 205 | 34% |

## What size are the companies that use Promptfoo?

No size of company stands out for Promptfoo. Companies with 50 to 999 employees make up the largest group, at 35%. 166 of its companies have more than 5,000 employees.

| Size | Share | Typical tech page |
|---|---:|---:|
| Under 50 employees | 20% | 22% |
| 50 to 999 | 35% | 38% |
| 1,000 to 5,000 | 17% | 17% |
| Over 5,000 | 27% | 23% |

## Where are Promptfoo companies based?

The United States and India have the most Promptfoo companies, at 49% and 8.7%. Its companies are based in 50 countries and territories.

| Country | Companies | Share | Typical tech page |
|---|---:|---:|---:|
| United States | 282 | 49% | 43% |
| India | 50 | 8.7% | 6.9% |
| United Kingdom | 34 | 5.9% | 6.4% |
| France | 25 | 4.3% | 4.6% |
| Germany | 24 | 4.2% | 4.4% |
| Canada | 18 | 3.1% | 3.6% |

## Which teams work with Promptfoo?

No team dominates Promptfoo job posts. AI comes first, at 8 companies.

| Team | Companies |
|---|---:|
| AI | 8 |
| Cybersecurity | 5 |
| Quality engineering | 4 |
| Technology | 4 |
| Engineering | 3 |
| Information security | 3 |

## Which roles mention Promptfoo most?

Software Development Engineer in Test job posts naming Promptfoo grew the fastest among its top roles: 47 from June to August 2026, up from 15 from March to May. AI Engineer posts naming it numbered 43 from March to May 2026 and 72 from June to August.

| Role | Share | Oct 2025 to Aug 2026 | Mar to May 2026 | Jun to Aug 2026 |
|---|---:|---:|---:|---:|
| AI Engineer | 34% | 156 | 43 | 72 |
| Software Development Engineer in Test | 18% | 80 | 15 | 47 |
| Software Engineer | 7.5% | 34 | 10 | 18 |
| Security Engineer | 4.8% | 22 | 11 | 2 |
| Quality Engineer | 2.9% | 13 | 4 | 5 |
| Platform Engineer | 1.5% | 7 | 3 | 3 |

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

From April to August 2026, 142 companies with 50 or more employees posted their first job naming Promptfoo: 65 commercial, 30 mid-market and 47 enterprise. Another 5 were AI-native companies, which we list separately.

| Group | Company | Job posts, April to August 2026 |
|---|---|---:|
| AI native | [FirstIgnite](https://sumble.com/orgs/firstignite) | 7 |
| AI native | [AIO](https://sumble.com/orgs/aioappofficial) | 1 |
| AI native | [Aurora](https://sumble.com/orgs/joinaurora) | 1 |
| AI native | [Nexxa.ai](https://sumble.com/orgs/nexxa-ai) | 1 |
| AI native | [Book by Anyone](https://sumble.com/orgs/bookbyanyone) | 1 |
| Commercial | [Unico Connect](https://sumble.com/orgs/unico-connect) | 6 |
| Commercial | [Ciklum India](https://sumble.com/orgs/infogenlabsaciklumcompany) | 5 |
| Commercial | [AiDASH](https://sumble.com/orgs/aidash) | 4 |
| Commercial | [Cyclotron, Inc.](https://sumble.com/orgs/cyclotron-com) | 4 |
| Commercial | [Newpage Solutions](https://sumble.com/orgs/newpage-digital-healthcare-solutions) | 4 |
| Mid-market | [Backbase](https://sumble.com/orgs/backbase) | 4 |
| Mid-market | [Deacero USA, Inc](https://sumble.com/orgs/deacero-usa-inc.) | 3 |
| Mid-market | [Mobileum](https://sumble.com/orgs/mobileum) | 3 |
| Mid-market | [This page is no longer active. See Propio Language Services.](https://sumble.com/orgs/propio-language-services) | 2 |
| Mid-market | [Tekion Corp](https://sumble.com/orgs/tekion) | 2 |
| Enterprise | [Accenture](https://sumble.com/orgs/accenture) | 6 |
| Enterprise | [Infosys](https://sumble.com/orgs/infosys) | 6 |
| Enterprise | [NTT DATA Europe & Latam](https://sumble.com/orgs/ntt-data-europe-latam) | 5 |
| Enterprise | [PwC Acceleration Center India](https://sumble.com/orgs/pwc-acceleration-centers-in-india) | 5 |
| Enterprise | [Capgemini](https://sumble.com/orgs/capgemini) | 3 |

Companies that named Promptfoo 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 Promptfoo companies use?

Promptfoo companies are 260 times as likely as similar companies to use Giskard: 5.3% of them, against 0.02%. Next is LangSmith: 53% of these companies use it, against 0.55% of similar ones.

| Tool | Companies | Also name it | Typical | Times as common |
|---|---:|---:|---:|---:|
| Giskard | 13 | 5.3% | 0.02% | 260 times |
| LangSmith | 130 | 53% | 0.55% | 96 times |
| Langfuse | 84 | 34% | 0.5% | 69 times |
| Arize | 18 | 7.4% | 0.13% | 57 times |
| LiteLLM | 23 | 9.4% | 0.18% | 52 times |
| pgvector | 75 | 31% | 0.73% | 42 times |
| KServe | 13 | 5.3% | 0.14% | 39 times |
| Weaviate | 91 | 37% | 1.1% | 33 times |

Shares are out of the 244 companies whose job posts name Promptfoo, not counting firms whose job posts name almost every technology.

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

326 job posts naming Promptfoo describe Generative AI work. Data Infrastructure Migration also appears, in 10 job posts.

| Project theme | Job posts |
|---|---:|
| Generative AI | 326 |
| Digital Transformation | 71 |
| Cloud Cost Optimization | 23 |
| Data Infrastructure Migration | 10 |

## 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.