Company lists · Data refreshed September 2026
Top 25 Ml training data companies worldwide
RevenueBase identified 126 company matches for ml training data companies worldwide as of September 2026 and tracks 23,263 professional contacts across them, including 878 with verified work emails. The United States is the largest market and San Francisco the largest hub.
This list covers company matches for ml training data companies worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 28, 2026. Country and city lists for ml training data companies follow the table.
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 ml training data companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 19,890 contacts → | ||||
Exact match “Appen has been a leader in AI training data for over 25 years, providing high-quality, diverse datasets that power the world's leading AI models.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 2 | 770 contacts → | ||||
Exact match “Thoth AI is a global AI data solutions company with R&D operations in Silicon Valley, working with AI teams to support the design, development, and deployment of production-grade…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 3 | 732 contacts → | ||||
Exact match “Toloka is the global leader in human-powered data solutions for AI development.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 4 | 455 contacts → | ||||
Exact match “LXT is an emerging leader in AI training data to power intelligent technology for global organizations.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 5 | 428 contacts → | ||||
Exact match “Wirestock powers AI labs with premium data from a global network of creators.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 6 | 72 contacts → | ||||
Exact match “Globose Technology Solutions is an AI based data collection and data annotation company specialising in providing high quality training data for machine learning and artificial…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 7 | 34 contacts → | ||||
Exact match “Are you struggling to find high-quality real-world unbiased training data for your machine-learning algorithms?” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 8 | 31 contacts → | ||||
Exact match “Skyfall AI specializes in gathering and curating large volumes of data to create High-Quality Datasets used to train Artificial Intelligence Models.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 9 | 30 contacts → | ||||
Exact match “Hub provides real-world training data to frontier AI labs and robotics companies.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 10 | 28 contacts → | ||||
Exact match “Unidata is a full-stack data provider for global AI/ML teams.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 11 | 26 contacts → | ||||
Exact match “Anote is an applied AI research company in New York City.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 12 | 25 contacts → | ||||
Exact match “Lightly is a data-centric AI company helping ML teams build better computer vision systems, from data curation and labeling to model pretraining and fine-tuning.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 13 | 21 contacts → | ||||
Exact match “Abundant is an applied research lab building the simulation engine for superintelligence.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 14 | 17 contacts → | ||||
Exact match “Reliabl is a Machine Learning training & evaluation platform that helps teams annotate nuanced content together, transforming user insights into high-quality, accurately labeled…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 15 | 15 contacts → | ||||
Exact match “AI Verse is a French deeptech company (launched in INRIA, a NATO DIANA company) that generates annotated synthetic imagery to train computer vision AI models.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 16 | 13 contacts → | ||||
Exact match “APTO is a Japan-based AI data company supporting the development of high-performance AI through high-quality data collection, creation, annotation, and evaluation.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 17 | 12 contacts → | ||||
Exact match “Innovatiana turns raw data into AI-ready fuel.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 18 | 10 contacts → | ||||
Exact match “DagsHub allows you to curate and annotate multimodal datasets, track experiments, and manage models on a single platform.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 19 | 8 contacts → | ||||
Exact match “Legally clean datasets for AI training.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 20 | 8 contacts → | ||||
Exact match “Generate, annotate, clean and enrich datasets for all your AI needs with Refuel's LLM-powered platform.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 21 | 4 contacts → | ||||
Exact match “Silera is a data engine for computer vision.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 22 | 3 contacts → | ||||
Exact match “At simmetry.ai, we provide high-quality, annotated training data for your machine learning applications.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 23 | 3 contacts → | ||||
Exact match “Rexys specializes in providing innovative solutions that enable the generation of synthetic datasets for training and validating artificial intelligence in the field of computer…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 24 | 2 contacts → | ||||
Exact match “We deliver teams building and using computer vision systems with the right datasets to train AI models, while minimizing effort.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
| 25 | 2 contacts → | ||||
Exact match “Edgecase is a data factory for A.I.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “ml training data companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 126 ml training data companies worldwide
See the full list, filter by size, metro and specialty, and access 878 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Ml training data companies worldwide at a glance
As of Sep 28, 2026Companies by employee count
Email recency is reported on each country list linked below.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- 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.
- Coverage
- Every country. Country and city lists for ml training data companies are linked below.
- What qualifies
- Company records worldwide whose business descriptions match “ml training data companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- 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 displayed company carries at least one verified work email. RevenueBase tracks 878 professional contacts with verified work emails across the full matched dataset. 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 28, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Ml training data companies by location
1 lists · largest firstEvery Ml training data companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “ml training data companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many ml training data companies are there worldwide?
RevenueBase identified 126 company matches for ml training data companies worldwide as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
APPEN tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which country has the most ml training data companies?
The United States leads with 40 companies. Every ml training data companies list by country and city is linked on this page.
Which city has the most ml training data companies?
San Francisco leads with 11 company records, followed by Bhiwadi (3) and Los Angeles (3).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 878 professional contacts with verified work emails tracked across these 126 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.
Ready to reach these companies? Verified emails and direct dials for all 126 ml training data companies worldwide. Start with a free account, no credit card.
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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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Company intelligence · public preview
Top 25 ml training data companies worldwide
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 126 matching company records for ml training data companies worldwide, with 23,263 tracked contacts and 878 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 28, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 ml training data companies worldwide
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  APPENappen.comHQ: Kirkland, WA, United StatesReported employees: Not recorded | Kirkland, WA, United States | Not recorded | Exact match | 19,890 contacts → |
“Appen has been a leader in AI training data for over 25 years, providing high-quality, diverse datasets that power the world's leading AI models.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Thoth AIaithoth.comHQ: Singapore, CA, United StatesReported employees: 201-500 | Singapore, CA, United States | 201-500 | Exact match | 770 contacts → |
“Thoth AI is a global AI data solutions company with R&D operations in Silicon Valley, working with AI teams to support the design, development, and deployment of production-grade…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Tolokatoloka.ai HQ: Amsterdam, NetherlandsReported employees: Not recorded | Amsterdam, Netherlands | Not recorded | Exact match | 732 contacts → |
“Toloka is the global leader in human-powered data solutions for AI development.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  LXTlxt.aiHQ: Mississauga, ON, CanadaReported employees: 501-1,000 | Mississauga, ON, Canada | 501-1,000 | Exact match | 455 contacts → |
“LXT is an emerging leader in AI training data to power intelligent technology for global organizations.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Wirestockwirestock.ioHQ: San Francisco, CA, United StatesReported employees: Not recorded | San Francisco, CA, United States | Not recorded | Exact match | 428 contacts → |
“Wirestock powers AI labs with premium data from a global network of creators.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | HQ: Bhiwadi, DE, IndiaReported employees: 51-200 | Bhiwadi, DE, India | 51-200 | Exact match | 72 contacts → |
“Globose Technology Solutions is an AI based data collection and data annotation company specialising in providing high quality training data for machine learning and artificial…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Futurebeeaifuturebeeai.comHQ: Ahmedabad, IndiaReported employees: 11-50 | Ahmedabad, India | 11-50 | Exact match | 34 contacts → |
“Are you struggling to find high-quality real-world unbiased training data for your machine-learning algorithms?” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Skyfall AIskyfallaico.com HQ: Muscat, WY, OmanReported employees: 11-50 | Muscat, WY, Oman | 11-50 | Exact match | 31 contacts → |
“Skyfall AI specializes in gathering and curating large volumes of data to create High-Quality Datasets used to train Artificial Intelligence Models.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  HUBhub.xyzHQ: San Francisco, CA, United StatesReported employees: 11-50 | San Francisco, CA, United States | 11-50 | Exact match | 30 contacts → |
“Hub provides real-world training data to frontier AI labs and robotics companies.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Unidataunidata.pro HQ: Dubai, United Arab EmiratesReported employees: 51-200 | Dubai, United Arab Emirates | 51-200 | Exact match | 28 contacts → |
“Unidata is a full-stack data provider for global AI/ML teams.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  ANOTEanote.aiHQ: New York City, NY, United StatesReported employees: 11-50 | New York City, NY, United States | 11-50 | Exact match | 26 contacts → |
“Anote is an applied AI research company in New York City.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Lightlylightly.aiHQ: Zurich, SwitzerlandReported employees: 11-50 | Zurich, Switzerland | 11-50 | Exact match | 25 contacts → |
“Lightly is a data-centric AI company helping ML teams build better computer vision systems, from data curation and labeling to model pretraining and fine-tuning.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Abundantabundant.aiHQ: San Francisco, CA, United StatesReported employees: 1-10 | San Francisco, CA, United States | 1-10 | Exact match | 21 contacts → |
“Abundant is an applied research lab building the simulation engine for superintelligence.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Reliablreliabl.aiHQ: Sacramento, CA, United StatesReported employees: 1-10 | Sacramento, CA, United States | 1-10 | Exact match | 17 contacts → |
“Reliabl is a Machine Learning training & evaluation platform that helps teams annotate nuanced content together, transforming user insights into high-quality, accurately labeled…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  AI Verseai-verse.comHQ: Biot, FranceReported employees: 11-50 | Biot, France | 11-50 | Exact match | 15 contacts → |
“AI Verse is a French deeptech company (launched in INRIA, a NATO DIANA company) that generates annotated synthetic imagery to train computer vision AI models.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Apto, INCapto.co.jpHQ: Tokyo, JapanReported employees: 11-50 | Tokyo, Japan | 11-50 | Exact match | 13 contacts → |
“APTO is a Japan-based AI data company supporting the development of high-performance AI through high-quality data collection, creation, annotation, and evaluation.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Innovatianainnovatiana.comHQ: Paris, FranceReported employees: 11-50 | Paris, France | 11-50 | Exact match | 12 contacts → |
“Innovatiana turns raw data into AI-ready fuel.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Dagshubdagshub.comHQ: San Francisco, United StatesReported employees: 11-50 | San Francisco, United States | 11-50 | Exact match | 10 contacts → |
“DagsHub allows you to curate and annotate multimodal datasets, track experiments, and manage models on a single platform.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Vaisual INCvaisual.com HQ: Wilmington, DE, United StatesReported employees: 1-10 | Wilmington, DE, United States | 1-10 | Exact match | 8 contacts → |
“Legally clean datasets for AI training.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Refuelrefuel.aiHQ: San Francisco, CA, United StatesReported employees: 1-10 | San Francisco, CA, United States | 1-10 | Exact match | 8 contacts → |
“Generate, annotate, clean and enrich datasets for all your AI needs with Refuel's LLM-powered platform.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Silerasilera.ai HQ: United StatesReported employees: 1-10 | United States | 1-10 | Exact match | 4 contacts → |
“Silera is a data engine for computer vision.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | simmetry.aisimmetry.ai HQ: Osnabrück, GermanyReported employees: 1-10 | Osnabrück, Germany | 1-10 | Exact match | 3 contacts → |
“At simmetry.ai, we provide high-quality, annotated training data for your machine learning applications.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Rexys INCrexys.ioHQ: Longueuil, QC, CanadaReported employees: 1-10 | Longueuil, QC, Canada | 1-10 | Exact match | 3 contacts → |
“Rexys specializes in providing innovative solutions that enable the generation of synthetic datasets for training and validating artificial intelligence in the field of computer…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Synthetic Imagessynthetic-images.com HQ: Munich, GermanyReported employees: 1-10 | Munich, Germany | 1-10 | Exact match | 2 contacts → |
“We deliver teams building and using computer vision systems with the right datasets to train AI models, while minimizing effort.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  edgecase.aiedgecase.aiHQ: Hingham, MA, United StatesReported employees: 51-200 | Hingham, MA, United States | 51-200 | Exact match | 2 contacts → |
“Edgecase is a data factory for A.I.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 126 company matches
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Ml training data companies: dataset insights
September 28, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
126 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole country list rather than for Worldwide, so it is reported there. Company counts and contact totals on this page are exact for Worldwide, over 126 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 28, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Ml training data companies by location
1 lists · largest firstEvery Ml training data companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
Questions about this company list
What does Exact match mean for ml training data companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many ml training data companies did RevenueBase find worldwide?
The saved snapshot records 126 matching company records, 23,263 tracked contacts and 878 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 28, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 25 ml training data companies worldwide. Snapshot: September 28, 2026. https://revenuebase.ai/companies/browse/ml-training-data-companies.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
Company intelligence · public preview
Top 25 ml training data companies worldwide
RevenueBase records 126 matching company records for ml training data companies worldwide, with 23,263 tracked contacts and 878 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 28, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 ml training data companies worldwide
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | APPENappen.com HQ: Kirkland, WA, United StatesReported employees: Not recorded | Kirkland, WA, United States | Not recorded | Exact match | 19,890 contacts → |
“Appen has been a leader in AI training data for over 25 years, providing high-quality, diverse datasets that power the world's leading AI models.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Thoth AIaithoth.com HQ: Singapore, CA, United StatesReported employees: 201-500 | Singapore, CA, United States | 201-500 | Exact match | 770 contacts → |
“Thoth AI is a global AI data solutions company with R&D operations in Silicon Valley, working with AI teams to support the design, development, and deployment of production-grade…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Tolokatoloka.ai HQ: Amsterdam, NetherlandsReported employees: Not recorded | Amsterdam, Netherlands | Not recorded | Exact match | 732 contacts → |
“Toloka is the global leader in human-powered data solutions for AI development.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | LXTlxt.ai HQ: Mississauga, ON, CanadaReported employees: 501-1,000 | Mississauga, ON, Canada | 501-1,000 | Exact match | 455 contacts → |
“LXT is an emerging leader in AI training data to power intelligent technology for global organizations.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Wirestockwirestock.io HQ: San Francisco, CA, United StatesReported employees: Not recorded | San Francisco, CA, United States | Not recorded | Exact match | 428 contacts → |
“Wirestock powers AI labs with premium data from a global network of creators.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | HQ: Bhiwadi, DE, IndiaReported employees: 51-200 | Bhiwadi, DE, India | 51-200 | Exact match | 72 contacts → |
“Globose Technology Solutions is an AI based data collection and data annotation company specialising in providing high quality training data for machine learning and artificial…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Futurebeeaifuturebeeai.com HQ: Ahmedabad, IndiaReported employees: 11-50 | Ahmedabad, India | 11-50 | Exact match | 34 contacts → |
“Are you struggling to find high-quality real-world unbiased training data for your machine-learning algorithms?” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Skyfall AIskyfallaico.com HQ: Muscat, WY, OmanReported employees: 11-50 | Muscat, WY, Oman | 11-50 | Exact match | 31 contacts → |
“Skyfall AI specializes in gathering and curating large volumes of data to create High-Quality Datasets used to train Artificial Intelligence Models.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | HUBhub.xyz HQ: San Francisco, CA, United StatesReported employees: 11-50 | San Francisco, CA, United States | 11-50 | Exact match | 30 contacts → |
“Hub provides real-world training data to frontier AI labs and robotics companies.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Unidataunidata.pro HQ: Dubai, United Arab EmiratesReported employees: 51-200 | Dubai, United Arab Emirates | 51-200 | Exact match | 28 contacts → |
“Unidata is a full-stack data provider for global AI/ML teams.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | ANOTEanote.ai HQ: New York City, NY, United StatesReported employees: 11-50 | New York City, NY, United States | 11-50 | Exact match | 26 contacts → |
“Anote is an applied AI research company in New York City.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Lightlylightly.ai HQ: Zurich, SwitzerlandReported employees: 11-50 | Zurich, Switzerland | 11-50 | Exact match | 25 contacts → |
“Lightly is a data-centric AI company helping ML teams build better computer vision systems, from data curation and labeling to model pretraining and fine-tuning.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Abundantabundant.ai HQ: San Francisco, CA, United StatesReported employees: 1-10 | San Francisco, CA, United States | 1-10 | Exact match | 21 contacts → |
“Abundant is an applied research lab building the simulation engine for superintelligence.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Reliablreliabl.ai HQ: Sacramento, CA, United StatesReported employees: 1-10 | Sacramento, CA, United States | 1-10 | Exact match | 17 contacts → |
“Reliabl is a Machine Learning training & evaluation platform that helps teams annotate nuanced content together, transforming user insights into high-quality, accurately labeled…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | AI Verseai-verse.com HQ: Biot, FranceReported employees: 11-50 | Biot, France | 11-50 | Exact match | 15 contacts → |
“AI Verse is a French deeptech company (launched in INRIA, a NATO DIANA company) that generates annotated synthetic imagery to train computer vision AI models.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Apto, INCapto.co.jp HQ: Tokyo, JapanReported employees: 11-50 | Tokyo, Japan | 11-50 | Exact match | 13 contacts → |
“APTO is a Japan-based AI data company supporting the development of high-performance AI through high-quality data collection, creation, annotation, and evaluation.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Innovatianainnovatiana.com HQ: Paris, FranceReported employees: 11-50 | Paris, France | 11-50 | Exact match | 12 contacts → |
“Innovatiana turns raw data into AI-ready fuel.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Dagshubdagshub.com HQ: San Francisco, United StatesReported employees: 11-50 | San Francisco, United States | 11-50 | Exact match | 10 contacts → |
“DagsHub allows you to curate and annotate multimodal datasets, track experiments, and manage models on a single platform.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Vaisual INCvaisual.com HQ: Wilmington, DE, United StatesReported employees: 1-10 | Wilmington, DE, United States | 1-10 | Exact match | 8 contacts → |
“Legally clean datasets for AI training.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Refuelrefuel.ai HQ: San Francisco, CA, United StatesReported employees: 1-10 | San Francisco, CA, United States | 1-10 | Exact match | 8 contacts → |
“Generate, annotate, clean and enrich datasets for all your AI needs with Refuel's LLM-powered platform.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Silerasilera.ai HQ: United StatesReported employees: 1-10 | United States | 1-10 | Exact match | 4 contacts → |
“Silera is a data engine for computer vision.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | simmetry.aisimmetry.ai HQ: Osnabrück, GermanyReported employees: 1-10 | Osnabrück, Germany | 1-10 | Exact match | 3 contacts → |
“At simmetry.ai, we provide high-quality, annotated training data for your machine learning applications.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Rexys INCrexys.io HQ: Longueuil, QC, CanadaReported employees: 1-10 | Longueuil, QC, Canada | 1-10 | Exact match | 3 contacts → |
“Rexys specializes in providing innovative solutions that enable the generation of synthetic datasets for training and validating artificial intelligence in the field of computer…” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Synthetic Imagessynthetic-images.com HQ: Munich, GermanyReported employees: 1-10 | Munich, Germany | 1-10 | Exact match | 2 contacts → |
“We deliver teams building and using computer vision systems with the right datasets to train AI models, while minimizing effort.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | edgecase.aiedgecase.ai HQ: Hingham, MA, United StatesReported employees: 51-200 | Hingham, MA, United States | 51-200 | Exact match | 2 contacts → |
“Edgecase is a data factory for A.I.” Recorded description excerpt · September 28, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 126 company matches
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Ml training data companies: dataset insights
September 28, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
126 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole country list rather than for Worldwide, so it is reported there. Company counts and contact totals on this page are exact for Worldwide, over 126 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 28, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Ml training data companies by location
1 lists · largest firstEvery Ml training data companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
Questions about this company list
What does Exact match mean for ml training data companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many ml training data companies did RevenueBase find worldwide?
The saved snapshot records 126 matching company records, 23,263 tracked contacts and 878 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 28, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
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Cite this list
RevenueBase Data Team. Top 25 ml training data companies worldwide. Snapshot: September 28, 2026. https://revenuebase.ai/companies/browse/ml-training-data-companies.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗