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Companies using Haystack

We found 1,757 companies that use Haystack. 1,069 of them name it in their own job posts, and the rest through employees' public profiles. 1,339 job posts named it from October 2025 to August 2026. It comes up most in AI Engineer job posts.

Data as of November 9, 2026 · Markdown version

Which companies name Haystack in the most job posts?

Accenture in India, Capital One and Boeing are among the companies with the most job posts naming Haystack. Accenture in India is the newest of the five companies in the table, with its first job post naming it in November 2025.
Company Posts People Recent job post
Accenture in India Professional Services · first seen Nov 2025 78 1 "Exposure to open-source AI and orchestration frameworks such as LangChain, LangGraph, LlamaIndex, Haystack, Semantic Kernel, MLflow, FastAPI, Docker and Kubernetes."ai infrastructure architect, Oct 27, 2026
Capital One Finance and Insurance · first seen Apr 2024 70 2 "…commercial LLMs, and some experience in latest open source libraries such as LangChain, haystack and vector databases like open search, chroma and FAISS"Lead Software Engineer, Sep 4, 2026
Boeing Manufacturing · first seen Jul 2022 57 3 "Use of applications such as TCMax, GOLDEsp, WoW, MJDI, PUBLOG, Haystack, C17 Technical Orders and cargo tracking."C17 Supply Chain Specialist, Jun 9, 2026
CACI International Inc Professional Services · first seen Sep 2022 55 1 "…Guard/Commercial databases/systems as well as One Touch Supply LogiQuest or Haystack and FedMall"Logistics Specialist/Ship Maintenance Support, Mar 3, 2026
Q.E.D. Systems, Inc. Scientific and Technical Services · first seen Sep 2022 52 0 "Conduct technical research using One Touch Support (OTS), FEDMALL and HAYSTACK"Logistics Material Specialist, Aug 20, 2026
Showing 1 to 5 of 1,069 companies with job posts Sign up to see all companies using Haystack ›

What else do we know about Haystack?

Is hiring for Haystack growing?

Job posts mentioning Haystack went from 0.70 to 0.76 in every 10,000 job posts, comparing March to May with June to August 2026. One company accounts for most of that change.
Share of job posts naming Haystack by month, October 2025 to August 2026, in job posts in every 10,000 Moves from 0.60 in October 2025 to 0.96 in August 2026, in job posts in every 10,000. 1.1 0.83 0.55 0.28 0 0.96 Oct '25 Nov Dec Jan '26 Feb Mar Apr May Jun Jul Aug
Show the data
MonthJob posts naming HaystackAll job postsPer 10,000
Oct 2025851,413,6730.60
Nov 20251141,822,1190.63
Dec 2025861,236,1030.70
Jan 20261281,828,0020.70
Feb 20261261,856,6470.68
Mar 20261271,850,7110.69
Apr 20261121,728,8860.65
May 20261371,821,5090.75
Jun 20261241,909,4960.65
Jul 20261241,815,1800.68
Aug 20261761,835,6980.96

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

From June to August 2026, 84 companies posted their first job naming Haystack; 97 did from March to May. The 84 from June to August are 7.9% of all 1,069 companies whose job posts name it.
March to May 2026 97
June to August 2026 84
October 2025 to August 2026 354

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 Haystack?

1,069 companies name Haystack in job posts they wrote, and employees' profiles add 688 more. 86 show up in both job posts and employees' profiles.
How we know Companies Share
Job posts name Haystack
1,069 61%
Employees' profiles list Haystack
688 39%

1,757 companies. Each is counted once, under the strongest evidence we have for it.

What size are the companies that use Haystack?

No size of company stands out for Haystack. Companies with 50 to 999 employees make up the largest group, at 40%. 358 of its companies have more than 5,000 employees.

Share of its companies Typical tech page

ShareTypical
Under 50 employees
25% 22%
50 to 999
40% 38%
1,000 to 5,000
15% 17%
Over 5,000
20% 23%

Where are Haystack companies based?

Beyond the United States (49%), Haystack is unusually common in Germany, at 6.3% of its companies. India is second, at 8.3%.
ShareTypical
United States
49% 43%
India
8.3% 6.9%
Germany
6.3% 4.4%
United Kingdom
5.4% 6.4%
France
3.7% 4.6%
Canada
2.5% 3.6%

Companies in 68 countries and territories. Shares are of companies with a known headquarters country.

Show the data
CountryCompaniesShareTypical tech page
United States83349%43%
India1418.3%6.9%
Germany1066.3%4.4%
United Kingdom925.4%6.4%
France633.7%4.6%
Canada432.5%3.6%

Which teams work with Haystack?

No team dominates Haystack job posts. AI comes first, at 7 companies.
Team Companies
AI
7
Generative AI
6
Data & AI
5
Data & analytics
5
Data science
5
Engineering
5

What else do Haystack companies use?

Cohere and LlamaIndex are the tools most closely tied to Haystack. Weaviate is 38 times as common as usual, at 34%.

Share of the 688 Haystack companies counted here whose job posts also name the tool Typical for companies the same size

Tool Also name it Typical Times as common
Cohere 35 companies
5.1% 0.11% 44x
LlamaIndex 367 companies
53% 1.3% 40x
Weaviate 231 companies
34% 0.88% 38x
FAISS 179 companies
26% 0.69% 38x
Tool Also name it Typical Times as common
Milvus 110 companies
16% 0.45% 36x
Mistral 133 companies
19% 0.56% 35x
ChromaDB 124 companies
18% 0.52% 35x
Qdrant 93 companies
14% 0.43% 32x

Which companies started naming Haystack in job posts recently?

114 companies with 50 or more employees started naming Haystack in job posts between April and August 2026. 31 of them have more than 5,000 employees. Among the new commercial companies, R&K Enterprise Solutions, Inc. posted the most jobs naming it: 24.
AI native any size · 1 new
Company Posts
Fixit 1
Commercial 50 to 999 employees · 63 new
Company Posts
R&K Enterprise Solutions, Inc. 24
UsefulBI Corporation 5
EPS Corporation 5
techcarrot 3
5 Degrés 3
Mid-market 1,000 to 5,000 employees · 20 new
Company Posts
knowmad mood 4
Cloudera 3
Fast Shop S/A 3
Arcfield 3
conet 3
Enterprise over 5,000 employees · 31 new
Company Posts
aramco 6
Zendesk 5
BMW Group 3
Visa 3
Delivery Hero 3

Companies that named Haystack 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 Haystack most?

AI Engineer is the role behind 42% of the job posts that mention Haystack. Software Engineer is second, at 8.7%.
Role Share Posts
AI Engineer
42% 557
Software Engineer
8.7% 116
Data Scientist
5.1% 68
Supply Chain
4.8% 64
Skilled Trades
2.7% 36
Machine Learning
2.5% 34
Show the data
RoleShareOct 2025 to Aug 2026Mar to May 2026Jun to Aug 2026
AI Engineer42%557146159
Software Engineer8.7%1163416
Data Scientist5.1%681826
Supply Chain4.8%641329
Skilled Trades2.7%361011
Machine Learning2.5%3476

Which project themes come up in Haystack job posts?

Generative AI comes up most in job posts naming Haystack, in 1,445 of them. Broad digital transformation work shows up in 310 of its job posts; after that comes Cloud Cost Optimization, with 161.
Project theme Job posts
Generative AI 1,445
Digital Transformation 310
Cloud Cost Optimization 161
Microservices Migration 30
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.