# Companies using LangSmith

We found 4,414 companies that use LangSmith. 2,230 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 3,718 job posts naming it from October 2025 to August 2026. AI Engineer roles mention it most.

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

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

Deloitte, EPAM Systems and LangChain are among the companies with the most job posts naming LangSmith. Deloitte has named it in job posts the longest of the five companies in the table, since March 2024.

| Company | Job posts | People | Recent job post |
|---|---:|---:|---|
| [Deloitte](https://sumble.com/orgs/deloitte) | 134 | 48 | "…Java, Rust, SQL/NoSQL, PyTorch , TensorFlow, LangChain , LangGraph , LangSmith , LangFuse , Terraform , as well as unit, integration, and…" (Applied AI Platforms Engineer III - SAP Datasphere/BDC, Nov 7, 2026) |
| [EPAM Systems](https://sumble.com/orgs/epam-systems) | 113 | 12 | "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) |
| [LangChain](https://sumble.com/orgs/langchain) | 84 | 19 | "Administer LangSmith, our product, and use APIs to automate admin work" (IT Systems Administrator, Oct 22, 2026) |
| [Booz Allen Hamilton](https://sumble.com/orgs/booz-allen-hamilton) | 62 | 3 | "…and building observation layers for stakeholders, including Grafana, Langfuse, LangSmith, or Phoenix" (Agentic AI Engineer, Nov 6, 2026) |
| [GEICO](https://sumble.com/orgs/geico) | 60 | 5 | "Observability, evaluation, and tracing for GenAI systems (e.g., LangSmith, Arize Phoenix, Weights & Biases, OpenTelemetry)" (Distinguished Engineer, AI Applications, Sep 7, 2026) |

## Is hiring for LangSmith growing?

Employers mentioned LangSmith 1.4 times as often from June to August 2026 as from March to May. 2.8 in every 10,000 job posts named it, against 2.0 before. June 2026 was its highest month since October 2025, at 3.0.

| Month | Job posts naming it | All job posts | Per 10,000 job posts |
|---|---:|---:|---:|
| Oct 2025 | 140 | 1,413,673 | 0.99 |
| Nov 2025 | 199 | 1,822,119 | 1.1 |
| Dec 2025 | 140 | 1,236,103 | 1.1 |
| Jan 2026 | 241 | 1,828,002 | 1.3 |
| Feb 2026 | 327 | 1,856,647 | 1.8 |
| Mar 2026 | 298 | 1,850,711 | 1.6 |
| Apr 2026 | 338 | 1,728,886 | 2.0 |
| May 2026 | 458 | 1,821,509 | 2.5 |
| Jun 2026 | 568 | 1,909,496 | 3.0 |
| Jul 2026 | 491 | 1,815,180 | 2.7 |
| Aug 2026 | 518 | 1,835,698 | 2.8 |

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

From June to August 2026, 460 companies posted their first job naming LangSmith; 378 did from March to May. From October 2025 to August 2026, 1,220 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 | 378 |
| June to August 2026 | 460 |
| October 2025 to August 2026 | 1,220 |

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 LangSmith?

2,230 of the 4,414 companies name LangSmith in their own job posts. The other 2,184 show up because employees list it on their profiles. 350 show up in both job posts and employees' profiles.

| How we know | Companies | Share |
|---|---:|---:|
| Job posts name LangSmith | 2,230 | 51% |
| Employees' profiles list LangSmith | 2,184 | 49% |

## What size are the companies that use LangSmith?

The largest group of LangSmith users is companies with 50 to 999 employees (40%), more than on the typical tech page. 1,210 of its companies have fewer than 50 employees.

| Size | Share | Typical tech page |
|---|---:|---:|
| Under 50 employees | 27% | 22% |
| 50 to 999 | 40% | 38% |
| 1,000 to 5,000 | 16% | 17% |
| Over 5,000 | 17% | 23% |

## Where are LangSmith companies based?

The United States has the most LangSmith companies (45%), but Brazil stands out: 4% of them, against 2.8% on the typical tech page. India is second, at 9.7%.

| Country | Companies | Share | Typical tech page |
|---|---:|---:|---:|
| United States | 1,914 | 45% | 43% |
| India | 409 | 9.7% | 6.9% |
| United Kingdom | 235 | 5.6% | 6.4% |
| Brazil | 169 | 4% | 2.8% |
| Germany | 148 | 3.5% | 4.4% |
| Canada | 137 | 3.2% | 3.6% |

## Which teams work with LangSmith?

LangSmith work is spread across teams. AI leads, at 42 companies. AI engineering teams are second, at 27 companies, and engineering teams third, at 19.

| Team | Companies |
|---|---:|
| AI | 42 |
| AI engineering | 27 |
| Engineering | 19 |
| AI platform | 18 |
| Data science | 16 |
| Platform | 8 |

## Which roles mention LangSmith most?

AI Engineer is the most common role, in 44% of job posts naming LangSmith. AI Engineer posts naming it numbered 453 from March to May 2026 and 689 from June to August.

| Role | Share | Oct 2025 to Aug 2026 | Mar to May 2026 | Jun to Aug 2026 |
|---|---:|---:|---:|---:|
| AI Engineer | 44% | 1,637 | 453 | 689 |
| Software Engineer | 11% | 400 | 123 | 172 |
| Machine Learning | 5.1% | 189 | 62 | 54 |
| Software Development Engineer in Test | 3.3% | 122 | 34 | 53 |
| Data Scientist | 2.6% | 98 | 26 | 27 |
| Forward Deployed Engineer | 1.7% | 62 | 11 | 38 |

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

Between April and August 2026, LangSmith appeared for the first time in job posts at 540 companies: 296 commercial, 120 mid-market and 124 enterprise. Kyndryl leads the new enterprise companies, with 15 job posts from April to August.

| Group | Company | Job posts, April to August 2026 |
|---|---|---:|
| AI native | [FirstIgnite](https://sumble.com/orgs/firstignite) | 4 |
| AI native | [Hippocratic AI](https://sumble.com/orgs/hippocratic-ai-health) | 2 |
| AI native | [REAL](https://sumble.com/orgs/real-dev-li) | 2 |
| AI native | [Helsing](https://sumble.com/orgs/helsing) | 1 |
| AI native | [AIONOS](https://sumble.com/orgs/aionos-ai) | 1 |
| Commercial | [BIMM](https://sumble.com/orgs/bimm) | 12 |
| Commercial | [Ciklum India](https://sumble.com/orgs/infogenlabsaciklumcompany) | 9 |
| Commercial | [Unico Connect](https://sumble.com/orgs/unico-connect) | 7 |
| Commercial | [QuantumBlack, AI by McKinsey](https://sumble.com/orgs/mckinsey-com-business-functions-quantumblack-client-support-services) | 6 |
| Commercial | [Integrant, Inc.](https://sumble.com/orgs/integrant) | 6 |
| Mid-market | [Turing](https://sumble.com/orgs/turing-it) | 11 |
| Mid-market | [Accenture UK & Ireland](https://sumble.com/orgs/accenture-uk-ireland) | 8 |
| Mid-market | [Intellias](https://sumble.com/orgs/intellias) | 6 |
| Mid-market | [Saksoft](https://sumble.com/orgs/saksoft) | 6 |
| Mid-market | [Crunchyroll](https://sumble.com/orgs/crunchyroll) | 5 |
| Enterprise | [Kyndryl](https://sumble.com/orgs/kyndryl) | 15 |
| Enterprise | [Accenture in India](https://sumble.com/orgs/accentureindia) | 13 |
| Enterprise | [Thomson Reuters](https://sumble.com/orgs/thomson-reuters) | 8 |
| Enterprise | [Salesforce](https://sumble.com/orgs/salesforce) | 7 |
| Enterprise | [JLL](https://sumble.com/orgs/jll) | 7 |

Companies that named LangSmith 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 LangSmith companies use?

Arize, Promptfoo and Langfuse show up far more often at LangSmith companies than at companies of the same size. Pgvector is 40 times as common as usual, at 26%.

| Tool | Companies | Also name it | Typical | Times as common |
|---|---:|---:|---:|---:|
| Arize | 177 | 11% | 0.11% | 100 times |
| Promptfoo | 130 | 8.2% | 0.09% | 96 times |
| Langfuse | 566 | 36% | 0.44% | 82 times |
| pgvector | 409 | 26% | 0.65% | 40 times |
| Weights & Biases | 268 | 17% | 0.44% | 39 times |
| Qdrant | 296 | 19% | 0.49% | 38 times |
| Weaviate | 529 | 34% | 1% | 34 times |
| LangGraph | 1,082 | 69% | 2.1% | 32 times |

Shares are out of the 1,577 companies whose job posts name LangSmith, not counting firms whose job posts name almost every technology.

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

Teams hiring for LangSmith most often mention Generative AI, in 3,433 job posts. Apart from broad digital transformation work, Cloud Cost Optimization comes next, with 467.

| Project theme | Job posts |
|---|---:|
| Generative AI | 3,433 |
| Digital Transformation | 738 |
| Cloud Cost Optimization | 467 |
| Microservices Migration | 87 |

## 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.