Company lists · Data refreshed November 2026
Top 25 Data labeling and annotation services worldwide
RevenueBase identified 645 company matches for data labeling and annotation services worldwide as of November 2026 and tracks 20,834 professional contacts across them, including 1,971 with verified work emails. India is the largest market and Bangalore the largest hub.
This list covers company matches for data labeling and annotation services 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 November 6, 2026. Country and city lists for data labeling and annotation services 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 data labeling and annotation services worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,259 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 · Nov 6, 2026 · View company records in RevenueBase | |||||
| 2 | 954 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 · Nov 6, 2026 · View company records in RevenueBase | |||||
| 3 | 814 contacts → | ||||
Exact match “CapeStart is a US-focused global technology and services company helping organizations turn AI, data, and software ideas into production-ready systems.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 4 | 783 contacts → | ||||
Exact match “Toloka is the global leader in human-powered data solutions for AI development.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 5 | 748 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 · Nov 6, 2026 · View company records in RevenueBase | |||||
| 6 | 660 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 · Nov 6, 2026 · View company records in RevenueBase | |||||
| 7 | 575 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 · Nov 6, 2026 · View company records in RevenueBase | |||||
| 8 | 501 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 · Nov 6, 2026 · View company records in RevenueBase | |||||
| 9 | 498 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 · Nov 6, 2026 · View company records in RevenueBase | |||||
| 10 | 466 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 · Nov 6, 2026 · View company records in RevenueBase | |||||
| 11 | 392 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 · Nov 6, 2026 · View company records in RevenueBase | |||||
| 12 | 366 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 · Nov 6, 2026 · View company records in RevenueBase | |||||
| 13 | 337 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 · Nov 6, 2026 · View company records in RevenueBase | |||||
| 14 | 316 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 · Nov 6, 2026 · View company records in RevenueBase | |||||
| 15 | 299 contacts → | ||||
Exact match “Pareto.AI is a talent-first human data collection platform for AI research, empowering the top 0.01% of expert labelers to deliver the highest-quality training data.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 16 | 250 contacts → | ||||
Exact match “Infosearch BPO Services is one of the leading Annotation, BPO, Data Management and Call Center services firm based at Chennai, India.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 17 | 248 contacts → | ||||
Exact match “Experts in Digital world” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 18 | 242 contacts → | ||||
Exact match “At Quantigo AI, we empower businesses with cutting-edge AI training data solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 19 | 230 contacts → | ||||
Exact match “Lifewood Data Technology is a global AI data services company headquartered in Hong Kong.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 20 | 211 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 21 | 191 contacts → | ||||
Exact match “Supahands provides fully managed data labelling services for machine learning.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 22 | 171 contacts → | ||||
Exact match “Welcome to TAGFact, your premier media intelligence and data annotation/labeling solution.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 23 | 160 contacts → | ||||
Exact match “Label Your Data is a specialist AI training data provider for teams building AI systems in complex environments.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 24 | 144 contacts → | ||||
Exact match “Roboflow creates software-as-a-service products to make building with computer vision easy.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 25 | 142 contacts → | ||||
Exact match “Wow AI | Powered by AIxBlock - is an.” Recorded in the RevenueBase company graph · Nov 6, 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 “data labeling and annotation services”. 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 645 data labeling and annotation services worldwide
See the full list, filter by size, metro and specialty, and access 1,971 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Data labeling and annotation services worldwide at a glance
As of Nov 6, 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 data labeling and annotation services are linked below.
- What qualifies
- Company records worldwide whose business descriptions match “data labeling and annotation services” 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 1,971 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 November 6, 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.
Data labeling and annotation services by location
2 lists · largest firstEvery Data labeling and annotation services 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 “data labeling and annotation services”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many data labeling and annotation services are there worldwide?
RevenueBase identified 645 company matches for data labeling and annotation services worldwide as of November 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?
Objectways tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which country has the most data labeling and annotation services?
India leads with 194 companies, followed by the United States (98). Every data labeling and annotation services list by country and city is linked on this page.
Which city has the most data labeling and annotation services?
Bangalore leads with 22 company records, followed by Kolkata (13) and Nairobi (12).
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 1,971 professional contacts with verified work emails tracked across these 645 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 November 6, 2026.
Ready to reach these companies? Verified emails and direct dials for all 645 data labeling and annotation services 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 data labeling and annotation services worldwide
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 645 matching company records for data labeling and annotation services worldwide, with 20,834 tracked contacts and 1,971 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: November 6, 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 data labeling and annotation services 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 |  Objectwaysobjectways.comHQ: Scottsdale, United StatesReported employees: 1,001-5,000 | Scottsdale, United States | 1,001-5,000 | Exact match | 1,259 contacts → |
“Objectways is an AI data solutions company trusted by Fortune 500 enterprises and high-growth AI teams worldwide.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Sigma AIsigma.aiHQ: Miami, FL, United StatesReported employees: 501-1,000 | Miami, FL, United States | 501-1,000 | Exact match | 954 contacts → |
“With 30+ years of experience in data annotation, we support AI innovators to build smarter AI.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Capestartcapestart.comHQ: Cambridge, MA, United StatesReported employees: 501-1,000 | Cambridge, MA, United States | 501-1,000 | Exact match | 814 contacts → |
“CapeStart is a US-focused global technology and services company helping organizations turn AI, data, and software ideas into production-ready systems.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Tolokatoloka.aiHQ: Amsterdam, NetherlandsReported employees: Not recorded | Amsterdam, Netherlands | Not recorded | Exact match | 783 contacts → |
“Toloka is the global leader in human-powered data solutions for AI development.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Welo Datat.mtrbio.comHQ: United StatesReported employees: 1,001-5,000 | United States | 1,001-5,000 | Exact match | 748 contacts → |
“With 27+ years of experience, Welo Data is the human-centered infrastructure for globally effective AI.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Productive Playhouseproductiveplayhouse.comHQ: Los Angeles, CA, United StatesReported employees: 201-500 | Los Angeles, CA, United States | 201-500 | Exact match | 660 contacts → |
“Productive Playhouse is the execution partner technical program managers trust when scale, compliance, and quality can’t slip.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Mindy Supportmindy-support.comHQ: Krakow, CyprusReported employees: 1,001-5,000 | Krakow, Cyprus | 1,001-5,000 | Exact match | 575 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 · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Qualitas Globalqualitasglobal.comHQ: Pune, NY, IndiaReported employees: 201-500 | Pune, NY, India | 201-500 | Exact match | 501 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 · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Peroptyxperoptyx.comHQ: Castlebar, IrelandReported employees: Not recorded | Castlebar, Ireland | Not recorded | Exact match | 498 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 · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  LXTlxt.aiHQ: Mississauga, ON, CanadaReported employees: 501-1,000 | Mississauga, ON, Canada | 501-1,000 | Exact match | 466 contacts → |
“LXT is an emerging leader in AI training data to power intelligent technology for global organizations.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Oworkersoworkers.comHQ: Plovdiv, BulgariaReported employees: 201-500 | Plovdiv, Bulgaria | 201-500 | Exact match | 392 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 · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Superannotatesuperannotate.comHQ: San Francisco, CA, United StatesReported employees: 51-200 | San Francisco, CA, United States | 51-200 | Exact match | 366 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 · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  SHAIPshaip.comHQ: New York, NY, United StatesReported employees: 201-500 | New York, NY, United States | 201-500 | Exact match | 337 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 · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Abaka AIabaka.aiHQ: Palo Alto, United StatesReported employees: 51-200 | Palo Alto, United States | 51-200 | Exact match | 316 contacts → |
“Abaka AI delivers human intelligence data for frontier AI, helping power advanced systems through a trustworthy data platform.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | pareto.aipareto.ai HQ: Stanford, CA, United StatesReported employees: 51-200 | Stanford, CA, United States | 51-200 | Exact match | 299 contacts → |
“Pareto.AI is a talent-first human data collection platform for AI research, empowering the top 0.01% of expert labelers to deliver the highest-quality training data.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Infosearch BPO Services PVT LTDinfosearchbpo.comHQ: Chennai, IndiaReported employees: 201-500 | Chennai, India | 201-500 | Exact match | 250 contacts → |
“Infosearch BPO Services is one of the leading Annotation, BPO, Data Management and Call Center services firm based at Chennai, India.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | HQ: Mysuru, IndiaReported employees: 201-500 | Mysuru, India | 201-500 | Exact match | 248 contacts → |
“Experts in Digital world” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  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 · November 6, 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 | 230 contacts → |
“Lifewood Data Technology is a global AI data services company headquartered in Hong Kong.” Recorded description excerpt · November 6, 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 | 211 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 21 |  Supahandssupahands.aiHQ: Kuala Lumpur, MalaysiaReported employees: Not recorded | Kuala Lumpur, Malaysia | Not recorded | Exact match | 191 contacts → |
“Supahands provides fully managed data labelling services for machine learning.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Tagfacttagfact.comHQ: Bangalore, IndiaReported employees: 51-200 | Bangalore, India | 51-200 | Exact match | 171 contacts → |
“Welcome to TAGFact, your premier media intelligence and data annotation/labeling solution.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Label Your Datalabelyourdata.comHQ: Wilmington, United StatesReported employees: 201-500 | Wilmington, United States | 201-500 | Exact match | 160 contacts → |
“Label Your Data is a specialist AI training data provider for teams building AI systems in complex environments.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Roboflowroboflow.comHQ: Remote, United StatesReported employees: 51-200 | Remote, United States | 51-200 | Exact match | 144 contacts → |
“Roboflow creates software-as-a-service products to make building with computer vision easy.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  WOW AIaixblock.ioHQ: Newark, DE, United StatesReported employees: 201-500 | Newark, DE, United States | 201-500 | Exact match | 142 contacts → |
“Wow AI | Powered by AIxBlock - is an.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 645 company matches
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Data labeling and annotation services: dataset insights
November 6, 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
645 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 645 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: November 6, 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 ↗
Data labeling and annotation services by location
2 lists · largest firstEvery Data labeling and annotation services 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 data labeling and annotation services?
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 data labeling and annotation services did RevenueBase find worldwide?
The saved snapshot records 645 matching company records, 20,834 tracked contacts and 1,971 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: November 6, 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 data labeling and annotation services worldwide. Snapshot: November 6, 2026. https://revenuebase.ai/companies/browse/data-labeling-and-annotation-services.
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 data labeling and annotation services worldwide
RevenueBase records 645 matching company records for data labeling and annotation services worldwide, with 20,834 tracked contacts and 1,971 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: November 6, 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 data labeling and annotation services 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 | Objectwaysobjectways.com HQ: Scottsdale, United StatesReported employees: 1,001-5,000 | Scottsdale, United States | 1,001-5,000 | Exact match | 1,259 contacts → |
“Objectways is an AI data solutions company trusted by Fortune 500 enterprises and high-growth AI teams worldwide.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Sigma AIsigma.ai HQ: Miami, FL, United StatesReported employees: 501-1,000 | Miami, FL, United States | 501-1,000 | Exact match | 954 contacts → |
“With 30+ years of experience in data annotation, we support AI innovators to build smarter AI.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Capestartcapestart.com HQ: Cambridge, MA, United StatesReported employees: 501-1,000 | Cambridge, MA, United States | 501-1,000 | Exact match | 814 contacts → |
“CapeStart is a US-focused global technology and services company helping organizations turn AI, data, and software ideas into production-ready systems.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Tolokatoloka.ai HQ: Amsterdam, NetherlandsReported employees: Not recorded | Amsterdam, Netherlands | Not recorded | Exact match | 783 contacts → |
“Toloka is the global leader in human-powered data solutions for AI development.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Welo Datat.mtrbio.com HQ: United StatesReported employees: 1,001-5,000 | United States | 1,001-5,000 | Exact match | 748 contacts → |
“With 27+ years of experience, Welo Data is the human-centered infrastructure for globally effective AI.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Productive Playhouseproductiveplayhouse.com HQ: Los Angeles, CA, United StatesReported employees: 201-500 | Los Angeles, CA, United States | 201-500 | Exact match | 660 contacts → |
“Productive Playhouse is the execution partner technical program managers trust when scale, compliance, and quality can’t slip.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Mindy Supportmindy-support.com HQ: Krakow, CyprusReported employees: 1,001-5,000 | Krakow, Cyprus | 1,001-5,000 | Exact match | 575 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 · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Qualitas Globalqualitasglobal.com HQ: Pune, NY, IndiaReported employees: 201-500 | Pune, NY, India | 201-500 | Exact match | 501 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 · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Peroptyxperoptyx.com HQ: Castlebar, IrelandReported employees: Not recorded | Castlebar, Ireland | Not recorded | Exact match | 498 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 · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | LXTlxt.ai HQ: Mississauga, ON, CanadaReported employees: 501-1,000 | Mississauga, ON, Canada | 501-1,000 | Exact match | 466 contacts → |
“LXT is an emerging leader in AI training data to power intelligent technology for global organizations.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Oworkersoworkers.com HQ: Plovdiv, BulgariaReported employees: 201-500 | Plovdiv, Bulgaria | 201-500 | Exact match | 392 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 · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Superannotatesuperannotate.com HQ: San Francisco, CA, United StatesReported employees: 51-200 | San Francisco, CA, United States | 51-200 | Exact match | 366 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 · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | SHAIPshaip.com HQ: New York, NY, United StatesReported employees: 201-500 | New York, NY, United States | 201-500 | Exact match | 337 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 · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Abaka AIabaka.ai HQ: Palo Alto, United StatesReported employees: 51-200 | Palo Alto, United States | 51-200 | Exact match | 316 contacts → |
“Abaka AI delivers human intelligence data for frontier AI, helping power advanced systems through a trustworthy data platform.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | pareto.aipareto.ai HQ: Stanford, CA, United StatesReported employees: 51-200 | Stanford, CA, United States | 51-200 | Exact match | 299 contacts → |
“Pareto.AI is a talent-first human data collection platform for AI research, empowering the top 0.01% of expert labelers to deliver the highest-quality training data.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Infosearch BPO Services PVT LTDinfosearchbpo.com HQ: Chennai, IndiaReported employees: 201-500 | Chennai, India | 201-500 | Exact match | 250 contacts → |
“Infosearch BPO Services is one of the leading Annotation, BPO, Data Management and Call Center services firm based at Chennai, India.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | HQ: Mysuru, IndiaReported employees: 201-500 | Mysuru, India | 201-500 | Exact match | 248 contacts → |
“Experts in Digital world” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | 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 · November 6, 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 | 230 contacts → |
“Lifewood Data Technology is a global AI data services company headquartered in Hong Kong.” Recorded description excerpt · November 6, 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 | 211 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 | 191 contacts → |
“Supahands provides fully managed data labelling services for machine learning.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Tagfacttagfact.com HQ: Bangalore, IndiaReported employees: 51-200 | Bangalore, India | 51-200 | Exact match | 171 contacts → |
“Welcome to TAGFact, your premier media intelligence and data annotation/labeling solution.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Label Your Datalabelyourdata.com HQ: Wilmington, United StatesReported employees: 201-500 | Wilmington, United States | 201-500 | Exact match | 160 contacts → |
“Label Your Data is a specialist AI training data provider for teams building AI systems in complex environments.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Roboflowroboflow.com HQ: Remote, United StatesReported employees: 51-200 | Remote, United States | 51-200 | Exact match | 144 contacts → |
“Roboflow creates software-as-a-service products to make building with computer vision easy.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | WOW AIaixblock.io HQ: Newark, DE, United StatesReported employees: 201-500 | Newark, DE, United States | 201-500 | Exact match | 142 contacts → |
“Wow AI | Powered by AIxBlock - is an.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 645 company matches
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Data labeling and annotation services: dataset insights
November 6, 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
645 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 645 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: November 6, 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 ↗
Data labeling and annotation services by location
2 lists · largest firstEvery Data labeling and annotation services 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 data labeling and annotation services?
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 data labeling and annotation services did RevenueBase find worldwide?
The saved snapshot records 645 matching company records, 20,834 tracked contacts and 1,971 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: November 6, 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 data labeling and annotation services worldwide. Snapshot: November 6, 2026. https://revenuebase.ai/companies/browse/data-labeling-and-annotation-services.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗