Company lists · Data refreshed September 2026
Top 25 Machine learning data preparation companies based in the United States
RevenueBase identified 294 machine learning data preparation companies headquartered in the United States as of September 2026 and tracks 20,019 professional contacts across them, including 3,312 with verified work emails and 1,649 with mobile numbers. New York is the largest hub.
This list covers machine learning data preparation companies headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed September 5, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest machine learning data preparation companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 6,538 | ||||
“iMerit is a leader in expert data solutions for training, tuning and evaluating AI models and computer vision systems.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 4,941 | ||||
“Invisible Technologies makes AI work.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | ObjectwaysPartial evidence | 1,272 | |||
“Objectways is an AI data solutions company trusted by Fortune 500 enterprises and high-growth AI teams worldwide.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,244 | ||||
“Strengthen your entire data journey with Domo’s AI and data products.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | 977 | ||||
“provides ML data operations support with Human-in-the-loop for LLMs and autonomous systems, focusing on AI/ML model training and annotation services.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | 751 | ||||
“Cogito Tech is a global managed service provider specializing in scalable data development tailored for AI model development.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 287 | ||||
“Ganit is a full stack data company founded in 2017 with a mission to decipher the transformative power of artificial intelligence for businesses.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 231 | ||||
“Abaka AI delivers human intelligence data for frontier AI, helping power advanced systems through a trustworthy data platform.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | 205 | ||||
“Defined.ai is the leading provider of ethical AI data, offering the world’s biggest ethical AI data marketplace alongside subscriptions for flexible data access and custom…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 161 | ||||
“With three decades at the forefront of applied AI and machine learning, Elder Research, a MANTECH company, gives large organizations and government agencies a surefire way to…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | Label Your DataPartial evidence | 148 | |||
“Label Your Data is a data annotation & labeling company.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 144 | ||||
“Wow AI | Powered by AIxBlock - is an.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | Appen Butler Hill, INCIndirect evidence | 127 | |||
“APPEN BUTLER HILL, INC is an information technology and services company based out of 12131 113TH AVE NE, Kirkland, Washington, United States.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | Liberty Source PBCStrong evidence | 116 | |||
“Liberty Source PBC is a U.S-based provider of human-in-the-loop data services that help companies realize maximum value from their Artificial Intelligence, Machine Learning, and…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 112 | ||||
“Aretove Technologies is a data focused company, headquartered in NYC, providing Software Services in Data Engineering, Enterprise Application Integration and Agentic AI.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | Opentrain AIPartial evidence | 104 | |||
“The AI Data Labeling Marketplace: Find, hire, and securely pay vetted AI Trainers/data labelers across 110+ countries & any domain expertise.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 97 | ||||
“Rezilyens is guided by four principles: customer obsession rather than competitor focus, passion for innovation, commitment to excellence, and long-term thinking.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | 78 | ||||
“HumanSignal enables data science teams to build AI models with their company DNA.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 76 | ||||
“AI Workspace has bagged a unique position in deliberating Sourcing, Data Annotation, and Generative AI services thereby initializing supervised learning for Machine Learning…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | 74 | ||||
“Anolytics is a leading provider of AI data solutions, with offices in India and the USA.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | 73 | ||||
“Pacific Data Integrators (PDI) helps enterprises modernize data platforms, improve data quality, accelerate cloud migration, and operationalize AI across Informatica, Salesforce…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | 63 | ||||
“ElectrifAi’s pre-built Machine Learning, NLP, and Computer Vision software products solve high-value business problems with guaranteed 5x ROI in 6-8 weeks.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | 55 | ||||
“For more than 25 years, Daman has been helping clients maximize the value of their data with a full spectrum of data management solutions.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | 53 | ||||
“The Alesco Team is comprised of seasoned data professionals, most of whom have over a decade of industry experience.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | 47 | ||||
“SYSTEM2 helps investors and operators integrate data science into their approach through sourcing, engineering, and analysis of big data as a service.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 294 machine learning data preparation companies based in the United States
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Machine learning data preparation companies based in the United States at a glance
As of Sep 5, 2026Companies by employee count
Verified emails by last verification
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among machine learning data preparation companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “machine learning data preparation companies”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among machine learning data preparation companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and an evidence rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 3,312 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 5, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Frequently asked
How many machine learning data preparation companies are there based in the United States?
RevenueBase identified 294 machine learning data preparation companies headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Imerit Technology, headquartered in San Jose, tops this list with the largest team on record.
Which city has the most machine learning data preparation companies?
New York leads with 23 headquartered companies, followed by San Francisco (18) and Austin (11).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 3,312 verified decision-maker contacts tracked across these 294 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 5, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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