Company lists · Data refreshed September 2026
Top 25 AI data annotation companies worldwide
RevenueBase identified 650 company matches for AI data annotation companies worldwide as of September 2026 and tracks 23,175 professional contacts across them, including 1,866 with verified work emails. India is the largest market and Bengaluru the largest hub.
This list covers company matches for AI data annotation 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 19, 2026. Country and city lists for AI data annotation 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 AI data annotation companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 3,009 contacts → | ||||
Exact match “What Does Sama Do Sama gets your AI project to production-and helps you stay there.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 2 | 1,272 contacts → | ||||
Exact match “Objectways is an AI data solutions company trusted by Fortune 500 enterprises and high-growth AI teams worldwide.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 3 | 977 contacts → | ||||
Exact match “provides ML data operations support with Human-in-the-loop for LLMs and autonomous systems, focusing on AI/ML model training and annotation services.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 4 | 899 contacts → | ||||
Exact match “With 30+ years of experience in data annotation, we support AI innovators to build smarter AI.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 5 | 796 contacts → | ||||
Exact match “CapeStart is a global technology and services company that empowers organizations to compete and thrive in the digital economy.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 6 | 751 contacts → | ||||
Exact match “Cogito Tech is a global managed service provider specializing in scalable data development tailored for AI model development.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 7 | 732 contacts → | ||||
Exact match “Toloka is the global leader in human-powered data solutions for AI development.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 8 | 654 contacts → | ||||
Exact match “Productive Playhouse is the execution partner technical program managers trust when scale, compliance, and quality can’t slip.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 9 | 567 contacts → | ||||
Exact match “Mindy Support delivers end-to-end AI data infrastructure - from data collection and annotation to LLM training and BPO - trusted by Fortune 500 and GAFAM companies.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 10 | 524 contacts → | ||||
Exact match “With 27+ years of experience, Welo Data is the human-centered infrastructure for globally effective AI.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 11 | 493 contacts → | ||||
Exact match “Peroptyx is a provider of location-based machine learning (ML) training data and model evaluation solutions to global consumer technology brands.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 12 | 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 19, 2026 · View company records in RevenueBase | |||||
| 13 | 437 contacts → | ||||
Exact match “Dedicated to revolutionizing the way outsourcing industries operate, Qualitas Global Services has emerged as a trusted business partner & key player in the data services industry.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 14 | 370 contacts → | ||||
Exact match “We are a MULTILINGUAL BPO company (Business Process Outsourcing) highly specialized in :>> HIRE with Staff augmentation solution - We source, hire, host and supervise your staff…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 15 | 356 contacts → | ||||
Exact match “SuperAnnotate bridges the gap between cutting-edge AI innovation and the high-quality human data that powers it - helping advanced AI teams build more intelligent models.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 16 | 328 contacts → | ||||
Exact match “Shaip, by Ubiquity, provides end-to-end AI data services-data collection, licensing, validation, transcription, and annotation-across text, audio, image, and video.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 17 | 242 contacts → | ||||
Exact match “At Quantigo AI, we empower businesses with cutting-edge AI training data solutions.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 18 | 231 contacts → | ||||
Exact match “Abaka AI delivers human intelligence data for frontier AI, helping power advanced systems through a trustworthy data platform.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 19 | 208 contacts → | ||||
Exact match “Lifewood Data Technology is a global AI data services company headquartered in Hong Kong.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 20 | 203 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 21 | 181 contacts → | ||||
Exact match “Supahands provides fully managed data labelling services for machine learning.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 22 | 160 contacts → | ||||
Exact match “Welcome to TAGFact, your premier media intelligence and data annotation/labeling solution.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 23 | 148 contacts → | ||||
Exact match “Label Your Data is a data annotation & labeling company.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 24 | 128 contacts → | ||||
Exact match “Prosessor.AI is a high-grade AI/ML data provider company for a smarter world.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 25 | 127 contacts → | ||||
Exact match “APPEN BUTLER HILL, INC is an information technology and services company based out of 12131 113TH AVE NE, Kirkland, Washington, United States.” Recorded in the RevenueBase company graph · Sep 19, 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 “AI data annotation 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 650 AI data annotation companies worldwide
See the full list, filter by size, metro and specialty, and access 1,866 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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AI data annotation companies worldwide at a glance
As of Sep 19, 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 AI data annotation companies are linked below.
- What qualifies
- Company records worldwide whose business descriptions match “AI data annotation 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 1,866 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 19, 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.
AI data annotation companies by location
2 lists · largest firstEvery AI data annotation 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 “AI data annotation companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many AI data annotation companies are there worldwide?
RevenueBase identified 650 company matches for AI data annotation 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?
SAMA tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which country has the most AI data annotation companies?
India leads with 191 companies, followed by the United States (107). Every AI data annotation companies list by country and city is linked on this page.
Which city has the most AI data annotation companies?
Bengaluru leads with 16 company records, followed by Kolkata (14) and San Francisco (14).
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 1,866 professional contacts with verified work emails tracked across these 650 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 19, 2026.
Ready to reach these companies? Verified emails and direct dials for all 650 AI data annotation 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.
More company lists
Company intelligence · public preview
Top 25 AI data annotation 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 650 matching company records for AI data annotation companies worldwide, with 23,175 tracked contacts and 1,866 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 19, 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 AI data annotation 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 |  SAMAsama.comHQ: San Francisco, CA, United StatesReported employees: 1,001-5,000 | San Francisco, CA, United States | 1,001-5,000 | Exact match | 3,009 contacts → |
“What Does Sama Do Sama gets your AI project to production-and helps you stay there.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Objectwaysobjectways.comHQ: Scottsdale, AZ, United StatesReported employees: 1,001-5,000 | Scottsdale, AZ, United States | 1,001-5,000 | Exact match | 1,272 contacts → |
“Objectways is an AI data solutions company trusted by Fortune 500 enterprises and high-growth AI teams worldwide.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Digital Divide Data DDDdigitaldividedata.comHQ: New York, NY, United StatesReported employees: 1,001-5,000 | New York, NY, United States | 1,001-5,000 | Exact match | 977 contacts → |
“provides ML data operations support with Human-in-the-loop for LLMs and autonomous systems, focusing on AI/ML model training and annotation services.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Sigma AIsigma.aiHQ: Miami, FL, United StatesReported employees: 501-1,000 | Miami, FL, United States | 501-1,000 | Exact match | 899 contacts → |
“With 30+ years of experience in data annotation, we support AI innovators to build smarter AI.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Capestartcapestart.comHQ: Cambridge, MA, United StatesReported employees: 501-1,000 | Cambridge, MA, United States | 501-1,000 | Exact match | 796 contacts → |
“CapeStart is a global technology and services company that empowers organizations to compete and thrive in the digital economy.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Cogito Techcogitotech.comHQ: New York, NY, United StatesReported employees: 1,001-5,000 | New York, NY, United States | 1,001-5,000 | Exact match | 751 contacts → |
“Cogito Tech is a global managed service provider specializing in scalable data development tailored for AI model development.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | 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 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Productive Playhouseproductiveplayhouse.comHQ: Los Angeles, CA, United StatesReported employees: 201-500 | Los Angeles, CA, United States | 201-500 | Exact match | 654 contacts → |
“Productive Playhouse is the execution partner technical program managers trust when scale, compliance, and quality can’t slip.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Mindy Supportmindy-support.comHQ: CyprusReported employees: 1,001-5,000 | Cyprus | 1,001-5,000 | Exact match | 567 contacts → |
“Mindy Support delivers end-to-end AI data infrastructure - from data collection and annotation to LLM training and BPO - trusted by Fortune 500 and GAFAM companies.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Welo Datat.mtrbio.comHQ: United StatesReported employees: 1,001-5,000 | United States | 1,001-5,000 | Exact match | 524 contacts → |
“With 27+ years of experience, Welo Data is the human-centered infrastructure for globally effective AI.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Peroptyxperoptyx.com HQ: Castlebar, IrelandReported employees: Not recorded | Castlebar, Ireland | Not recorded | Exact match | 493 contacts → |
“Peroptyx is a provider of location-based machine learning (ML) training data and model evaluation solutions to global consumer technology brands.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  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 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Qualitas Globalqualitasglobal.comHQ: Pune, IndiaReported employees: 201-500 | Pune, India | 201-500 | Exact match | 437 contacts → |
“Dedicated to revolutionizing the way outsourcing industries operate, Qualitas Global Services has emerged as a trusted business partner & key player in the data services industry.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Oworkersoworkers.com HQ: Plovdiv, BulgariaReported employees: 201-500 | Plovdiv, Bulgaria | 201-500 | Exact match | 370 contacts → |
“We are a MULTILINGUAL BPO company (Business Process Outsourcing) highly specialized in :>> HIRE with Staff augmentation solution - We source, hire, host and supervise your staff…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Superannotatesuperannotate.comHQ: San Francisco, CA, United StatesReported employees: 51-200 | San Francisco, CA, United States | 51-200 | Exact match | 356 contacts → |
“SuperAnnotate bridges the gap between cutting-edge AI innovation and the high-quality human data that powers it - helping advanced AI teams build more intelligent models.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  SHAIPshaip.comHQ: New York, NY, United StatesReported employees: 201-500 | New York, NY, United States | 201-500 | Exact match | 328 contacts → |
“Shaip, by Ubiquity, provides end-to-end AI data services-data collection, licensing, validation, transcription, and annotation-across text, audio, image, and video.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Quantigo AIquantigo.aiHQ: Toronto, ON, CanadaReported employees: 51-200 | Toronto, ON, Canada | 51-200 | Exact match | 242 contacts → |
“At Quantigo AI, we empower businesses with cutting-edge AI training data solutions.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Abaka AIabaka.aiHQ: Palo Alto, United StatesReported employees: 51-200 | Palo Alto, United States | 51-200 | Exact match | 231 contacts → |
“Abaka AI delivers human intelligence data for frontier AI, helping power advanced systems through a trustworthy data platform.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Lifewood Data Technology LTDlifewood.comHQ: San Jose, United StatesReported employees: 1,001-5,000 | San Jose, United States | 1,001-5,000 | Exact match | 208 contacts → |
“Lifewood Data Technology is a global AI data services company headquartered in Hong Kong.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  OITorelit.comHQ: Nawinna, Sri LankaReported employees: 1,001-5,000 | Nawinna, Sri Lanka | 1,001-5,000 | Exact match | 203 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 21 | Supahandssupahands.ai HQ: Kuala Lumpur, MalaysiaReported employees: Not recorded | Kuala Lumpur, Malaysia | Not recorded | Exact match | 181 contacts → |
“Supahands provides fully managed data labelling services for machine learning.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Tagfacttagfact.comHQ: Bangalore, IndiaReported employees: 51-200 | Bangalore, India | 51-200 | Exact match | 160 contacts → |
“Welcome to TAGFact, your premier media intelligence and data annotation/labeling solution.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Label Your Datalabelyourdata.comHQ: Wilmington, DE, United StatesReported employees: 201-500 | Wilmington, DE, United States | 201-500 | Exact match | 148 contacts → |
“Label Your Data is a data annotation & labeling company.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Prosessor.ai Data & Language Servicesprosessor-ai.comHQ: Istanbul, TürkiyeReported employees: Not recorded | Istanbul, Türkiye | Not recorded | Exact match | 128 contacts → |
“Prosessor.AI is a high-grade AI/ML data provider company for a smarter world.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Appen Butler Hill, INCappen.comHQ: Kirkland, WA, United StatesReported employees: 51-200 | Kirkland, WA, United States | 51-200 | Exact match | 127 contacts → |
“APPEN BUTLER HILL, INC is an information technology and services company based out of 12131 113TH AVE NE, Kirkland, Washington, United States.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 650 company matches
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AI data annotation companies: dataset insights
September 19, 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
650 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 650 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 19, 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 ↗
AI data annotation companies by location
2 lists · largest firstEvery AI data annotation 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 AI data annotation 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 AI data annotation companies did RevenueBase find worldwide?
The saved snapshot records 650 matching company records, 23,175 tracked contacts and 1,866 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 19, 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 AI data annotation companies worldwide. Snapshot: September 19, 2026. https://revenuebase.ai/companies/browse/ai-data-annotation-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 AI data annotation companies worldwide
RevenueBase records 650 matching company records for AI data annotation companies worldwide, with 23,175 tracked contacts and 1,866 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 19, 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 AI data annotation 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 | SAMAsama.com HQ: San Francisco, CA, United StatesReported employees: 1,001-5,000 | San Francisco, CA, United States | 1,001-5,000 | Exact match | 3,009 contacts → |
“What Does Sama Do Sama gets your AI project to production-and helps you stay there.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Objectwaysobjectways.com HQ: Scottsdale, AZ, United StatesReported employees: 1,001-5,000 | Scottsdale, AZ, United States | 1,001-5,000 | Exact match | 1,272 contacts → |
“Objectways is an AI data solutions company trusted by Fortune 500 enterprises and high-growth AI teams worldwide.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Digital Divide Data DDDdigitaldividedata.com HQ: New York, NY, United StatesReported employees: 1,001-5,000 | New York, NY, United States | 1,001-5,000 | Exact match | 977 contacts → |
“provides ML data operations support with Human-in-the-loop for LLMs and autonomous systems, focusing on AI/ML model training and annotation services.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Sigma AIsigma.ai HQ: Miami, FL, United StatesReported employees: 501-1,000 | Miami, FL, United States | 501-1,000 | Exact match | 899 contacts → |
“With 30+ years of experience in data annotation, we support AI innovators to build smarter AI.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Capestartcapestart.com HQ: Cambridge, MA, United StatesReported employees: 501-1,000 | Cambridge, MA, United States | 501-1,000 | Exact match | 796 contacts → |
“CapeStart is a global technology and services company that empowers organizations to compete and thrive in the digital economy.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Cogito Techcogitotech.com HQ: New York, NY, United StatesReported employees: 1,001-5,000 | New York, NY, United States | 1,001-5,000 | Exact match | 751 contacts → |
“Cogito Tech is a global managed service provider specializing in scalable data development tailored for AI model development.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | 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 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Productive Playhouseproductiveplayhouse.com HQ: Los Angeles, CA, United StatesReported employees: 201-500 | Los Angeles, CA, United States | 201-500 | Exact match | 654 contacts → |
“Productive Playhouse is the execution partner technical program managers trust when scale, compliance, and quality can’t slip.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Mindy Supportmindy-support.com HQ: CyprusReported employees: 1,001-5,000 | Cyprus | 1,001-5,000 | Exact match | 567 contacts → |
“Mindy Support delivers end-to-end AI data infrastructure - from data collection and annotation to LLM training and BPO - trusted by Fortune 500 and GAFAM companies.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Welo Datat.mtrbio.com HQ: United StatesReported employees: 1,001-5,000 | United States | 1,001-5,000 | Exact match | 524 contacts → |
“With 27+ years of experience, Welo Data is the human-centered infrastructure for globally effective AI.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Peroptyxperoptyx.com HQ: Castlebar, IrelandReported employees: Not recorded | Castlebar, Ireland | Not recorded | Exact match | 493 contacts → |
“Peroptyx is a provider of location-based machine learning (ML) training data and model evaluation solutions to global consumer technology brands.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | 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 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Qualitas Globalqualitasglobal.com HQ: Pune, IndiaReported employees: 201-500 | Pune, India | 201-500 | Exact match | 437 contacts → |
“Dedicated to revolutionizing the way outsourcing industries operate, Qualitas Global Services has emerged as a trusted business partner & key player in the data services industry.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Oworkersoworkers.com HQ: Plovdiv, BulgariaReported employees: 201-500 | Plovdiv, Bulgaria | 201-500 | Exact match | 370 contacts → |
“We are a MULTILINGUAL BPO company (Business Process Outsourcing) highly specialized in :>> HIRE with Staff augmentation solution - We source, hire, host and supervise your staff…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Superannotatesuperannotate.com HQ: San Francisco, CA, United StatesReported employees: 51-200 | San Francisco, CA, United States | 51-200 | Exact match | 356 contacts → |
“SuperAnnotate bridges the gap between cutting-edge AI innovation and the high-quality human data that powers it - helping advanced AI teams build more intelligent models.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | SHAIPshaip.com HQ: New York, NY, United StatesReported employees: 201-500 | New York, NY, United States | 201-500 | Exact match | 328 contacts → |
“Shaip, by Ubiquity, provides end-to-end AI data services-data collection, licensing, validation, transcription, and annotation-across text, audio, image, and video.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Quantigo AIquantigo.ai HQ: Toronto, ON, CanadaReported employees: 51-200 | Toronto, ON, Canada | 51-200 | Exact match | 242 contacts → |
“At Quantigo AI, we empower businesses with cutting-edge AI training data solutions.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Abaka AIabaka.ai HQ: Palo Alto, United StatesReported employees: 51-200 | Palo Alto, United States | 51-200 | Exact match | 231 contacts → |
“Abaka AI delivers human intelligence data for frontier AI, helping power advanced systems through a trustworthy data platform.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Lifewood Data Technology LTDlifewood.com HQ: San Jose, United StatesReported employees: 1,001-5,000 | San Jose, United States | 1,001-5,000 | Exact match | 208 contacts → |
“Lifewood Data Technology is a global AI data services company headquartered in Hong Kong.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | OITorelit.com HQ: Nawinna, Sri LankaReported employees: 1,001-5,000 | Nawinna, Sri Lanka | 1,001-5,000 | Exact match | 203 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 21 | Supahandssupahands.ai HQ: Kuala Lumpur, MalaysiaReported employees: Not recorded | Kuala Lumpur, Malaysia | Not recorded | Exact match | 181 contacts → |
“Supahands provides fully managed data labelling services for machine learning.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Tagfacttagfact.com HQ: Bangalore, IndiaReported employees: 51-200 | Bangalore, India | 51-200 | Exact match | 160 contacts → |
“Welcome to TAGFact, your premier media intelligence and data annotation/labeling solution.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Label Your Datalabelyourdata.com HQ: Wilmington, DE, United StatesReported employees: 201-500 | Wilmington, DE, United States | 201-500 | Exact match | 148 contacts → |
“Label Your Data is a data annotation & labeling company.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Prosessor.ai Data & Language Servicesprosessor-ai.com HQ: Istanbul, TürkiyeReported employees: Not recorded | Istanbul, Türkiye | Not recorded | Exact match | 128 contacts → |
“Prosessor.AI is a high-grade AI/ML data provider company for a smarter world.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Appen Butler Hill, INCappen.com HQ: Kirkland, WA, United StatesReported employees: 51-200 | Kirkland, WA, United States | 51-200 | Exact match | 127 contacts → |
“APPEN BUTLER HILL, INC is an information technology and services company based out of 12131 113TH AVE NE, Kirkland, Washington, United States.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
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AI data annotation companies: dataset insights
September 19, 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
650 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 650 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 19, 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 ↗
AI data annotation companies by location
2 lists · largest firstEvery AI data annotation 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 AI data annotation 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 AI data annotation companies did RevenueBase find worldwide?
The saved snapshot records 650 matching company records, 23,175 tracked contacts and 1,866 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 19, 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 AI data annotation companies worldwide. Snapshot: September 19, 2026. https://revenuebase.ai/companies/browse/ai-data-annotation-companies.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗