# Companies using Langfuse

6,246 companies use Langfuse, based on their job posts and their employees' public profiles. Its share of job posts jumped in the three months to August 2026, with 3,188 job posts naming it from October 2025 to August 2026. AI Engineer is the role that names it most often.

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

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

The five companies with the most job posts naming Langfuse are Deloitte, EPAM Systems, acemate.ai, Booz Allen Hamilton and Caseware. Booz Allen Hamilton is the newest of the five companies in the table, with its first job post naming it in March 2026.

| Company | Job posts | Recent job post |
|---|---:|---|
| [Deloitte](https://sumble.com/orgs/deloitte) | 134 | "…SQL/NoSQL, PyTorch , TensorFlow, LangChain , LangGraph , LangSmith , LangFuse , Terraform , as well as unit, integration, and end-to-end testing…" (Applied AI Platforms Engineer III - SAP Datasphere/BDC, Nov 7, 2026) |
| [EPAM Systems](https://sumble.com/orgs/epam-systems) | 105 | "AI Observability & Evaluation: Familiarity with AI evaluation tooling or real-time APM platforms (e.g., LangSmith, Langfuse, Arize)" (Lead Python AI Engineer, Oct 24, 2026) |
| [acemate.ai](https://sumble.com/orgs/acemateai) | 64 | "Sentry, Langfuse, PostHog, Stripe, BetterStack" (React Native Developer, Nov 4, 2026) |
| [Booz Allen Hamilton](https://sumble.com/orgs/booz-allen-hamilton) | 59 | "…evaluations, and building observation layers for stakeholders, including Grafana, Langfuse, LangSmith, or Phoenix" (Agentic AI Engineer, Nov 6, 2026) |
| [Caseware](https://sumble.com/orgs/caseware-international) | 55 | "AI Evaluation & Observability: LangFuse, LangSmith, LangChain, LangGraph" (AI Senior Software Developer, Oct 3, 2026) |

## Is hiring for Langfuse growing?

Job posts mentioning Langfuse went from 1.8 to 2.4 in every 10,000 job posts, comparing March to May with June to August 2026. July 2026 was its highest month since October 2025, at 2.6.

| Month | Job posts naming it | All job posts | Per 10,000 job posts |
|---|---:|---:|---:|
| Oct 2025 | 125 | 1,413,673 | 0.88 |
| Nov 2025 | 182 | 1,822,119 | 1.00 |
| Dec 2025 | 121 | 1,236,103 | 0.98 |
| Jan 2026 | 185 | 1,828,002 | 1.0 |
| Feb 2026 | 258 | 1,856,647 | 1.4 |
| Mar 2026 | 287 | 1,850,711 | 1.6 |
| Apr 2026 | 309 | 1,728,886 | 1.8 |
| May 2026 | 387 | 1,821,509 | 2.1 |
| Jun 2026 | 413 | 1,909,496 | 2.2 |
| Jul 2026 | 466 | 1,815,180 | 2.6 |
| Aug 2026 | 455 | 1,835,698 | 2.5 |

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

From June to August 2026, 443 companies posted their first job naming Langfuse; 359 did from March to May. That brings the companies naming it for the first time since October 2025 to 1,147, through August 2026.

| Period | Companies naming it in a job post for the first time |
|---|---:|
| March to May 2026 | 359 |
| June to August 2026 | 443 |
| October 2025 to August 2026 | 1,147 |

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 Langfuse?

4,238 of the 6,246 companies show up because employees list Langfuse on their profiles; 2,008 name it in their own job posts. 380 show up in both job posts and employees' profiles.

| How we know | Companies | Share |
|---|---:|---:|
| Job posts name Langfuse | 2,008 | 32% |
| Employees' profiles list Langfuse | 4,238 | 68% |

## What size are the companies that use Langfuse?

By size, the biggest group of Langfuse users is companies with 50 to 999 employees, at 43%. 1,389 of its companies have fewer than 50 employees.

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

## Where are Langfuse companies based?

Beyond the United States (32%), Langfuse is unusually common in Brazil, at 5.2% of its companies. India is second, at 13%.

| Country | Companies | Share | Typical tech page |
|---|---:|---:|---:|
| United States | 1,914 | 32% | 43% |
| India | 755 | 13% | 6.9% |
| Brazil | 313 | 5.2% | 2.8% |
| France | 303 | 5.1% | 4.6% |
| Germany | 277 | 4.6% | 4.4% |
| United Kingdom | 276 | 4.6% | 6.4% |

## Which teams work with Langfuse?

Langfuse sits mostly with AI teams (44 companies). Next come AI engineering teams (22 companies) and engineering teams (21).

| Team | Companies |
|---|---:|
| AI | 44 |
| AI engineering | 22 |
| Engineering | 21 |
| AI platform | 12 |
| Data science | 11 |
| Data | 10 |

## Which roles mention Langfuse most?

Langfuse is showing up in more Software Development Engineer in Test job posts: 39 from June to August 2026, up from 16 from March to May. AI Engineer posts naming it numbered 381 from March to May 2026 and 519 from June to August.

| Role | Share | Oct 2025 to Aug 2026 | Mar to May 2026 | Jun to Aug 2026 |
|---|---:|---:|---:|---:|
| AI Engineer | 40% | 1,261 | 381 | 519 |
| Software Engineer | 15% | 478 | 157 | 165 |
| Machine Learning | 4.9% | 156 | 59 | 46 |
| Data Scientist | 3.3% | 105 | 26 | 42 |
| MLOps Engineer | 2.6% | 84 | 24 | 26 |
| Software Development Engineer in Test | 2.2% | 70 | 16 | 39 |

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

Between April and August 2026, 515 companies with 50 or more employees first named Langfuse in a job post, 102 of them with more than 5,000 employees. Luxoft and Toast lead the new enterprise companies, with 12 job posts each from April to August.

| Group | Company | Job posts, April to August 2026 |
|---|---|---:|
| AI native | [Apilex](https://sumble.com/orgs/apilex) | 6 |
| AI native | [Kulu](https://sumble.com/orgs/kulu-ai) | 4 |
| AI native | [FieldAI](https://sumble.com/orgs/fieldai) | 3 |
| AI native | [Steps AI](https://sumble.com/orgs/stepsai-aide) | 3 |
| AI native | [MAIA](https://sumble.com/orgs/prodlane-maia) | 3 |
| Commercial | [Leadtech Group](https://sumble.com/orgs/leadtech) | 9 |
| Commercial | [Ciklum India](https://sumble.com/orgs/infogenlabsaciklumcompany) | 9 |
| Commercial | [Unico Connect](https://sumble.com/orgs/unico-connect) | 9 |
| Commercial | [QuantumBlack, AI by McKinsey](https://sumble.com/orgs/mckinsey-com-business-functions-quantumblack-client-support-services) | 6 |
| Commercial | [BCG Platinion](https://sumble.com/orgs/bcg-platinion) | 5 |
| Mid-market | [Turing](https://sumble.com/orgs/turing-it) | 11 |
| Mid-market | [Ascensus](https://sumble.com/orgs/ascensus) | 5 |
| Mid-market | [Keyrus](https://sumble.com/orgs/keyrus-belgium) | 5 |
| Mid-market | [Crunchyroll](https://sumble.com/orgs/crunchyroll) | 5 |
| Mid-market | [team.blue](https://sumble.com/orgs/team-blue-netherlands) | 5 |
| Enterprise | [Luxoft](https://sumble.com/orgs/luxoft) | 12 |
| Enterprise | [Toast](https://sumble.com/orgs/toast,-inc) | 12 |
| Enterprise | [Tata Consultancy Services](https://sumble.com/orgs/tata-consultancy-services-tcs) | 8 |
| Enterprise | [Accenture in India](https://sumble.com/orgs/accentureindia) | 8 |
| Enterprise | [UOB](https://sumble.com/orgs/united-overseas-bank) | 7 |

Companies that named Langfuse 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 Langfuse companies use?

LangSmith, Arize and Promptfoo show up far more often at Langfuse companies than at companies of the same size. Among the tools listed here, LangGraph is the most widely used, at 59% of Langfuse companies.

| Tool | Companies | Also name it | Typical | Times as common |
|---|---:|---:|---:|---:|
| LangSmith | 566 | 39% | 0.48% | 82 times |
| Arize | 122 | 8.5% | 0.11% | 76 times |
| Promptfoo | 84 | 5.8% | 0.08% | 69 times |
| LiteLLM | 147 | 10% | 0.16% | 65 times |
| Pydantic AI | 90 | 6.2% | 0.14% | 43 times |
| pgvector | 327 | 23% | 0.64% | 35 times |
| Qdrant | 242 | 17% | 0.49% | 35 times |
| LangGraph | 845 | 59% | 2.1% | 27 times |

Shares are out of the 1,442 companies whose job posts name Langfuse, not counting firms whose job posts name almost every technology.

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

Teams hiring for Langfuse most often mention Generative AI, in 2,479 job posts. Apart from broad digital transformation work, Cloud Cost Optimization comes next, with 439.

| Project theme | Job posts |
|---|---:|
| Generative AI | 2,479 |
| Digital Transformation | 649 |
| Cloud Cost Optimization | 439 |
| Data Infrastructure Migration | 109 |

## 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.