Company lists · Data refreshed September 2026

Top 25 Medical image annotation companies worldwide

RevenueBase identified 110 medical image annotation companies worldwide as of September 2026 and tracks 3,171 professional contacts across them, including 594 with verified work emails and 0 with mobile numbers. India is the largest market and Kolkata the largest hub.

This list covers medical image annotation companies worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 17, 2026. Country and city lists for medical image annotation companies follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 17, 2026 86% judged on-target in blind review
110Companies
3,171Contacts tracked
594Verified emails
0Mobile numbers
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest medical image annotation companies worldwide

Ranked by team size
Top 25 of 110 medical image annotation companies worldwide, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to medical image annotation companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceCambridge, MA, United StatesHQ checked Sep 17, 2026501-1,000796 contacts →

Indirect evidence

“CapeStart is a global technology and services company that empowers organizations to compete and thrive in the digital economy.”

Source: RevenueBase Database · checked Sep 17, 2026
2Partial evidenceBangalore, IndiaHQ checked Sep 17, 202651-200160 contacts →

Partial evidence

“Welcome to TAGFact, your premier media intelligence and data annotation/labeling solution.”

Source: RevenueBase Database · checked Sep 17, 2026
3Partial evidenceBoston, MA, United StatesHQ checked Sep 17, 202651-200149 contacts →

Partial evidence

“PaxeraHealth's mission is to democratize AI in medical imaging.”

Source: RevenueBase Database · checked Sep 17, 2026
4Partial evidenceWilmington, DE, United StatesHQ checked Sep 17, 2026201-500148 contacts →

Partial evidence

“Label Your Data is a data annotation & labeling company.”

Source: RevenueBase Database · checked Sep 17, 2026
5Partial evidenceWilmington, DE, United StatesHQ checked Sep 17, 202611-5095 contacts →

Partial evidence

“CVAT (Computer Vision Annotation Tool) is a leading platform for building high-quality visual datasets for vision AI.”

Source: RevenueBase Database · checked Sep 17, 2026
6Partial evidenceMenlo Park, CA, United StatesHQ checked Sep 17, 202651-20062 contacts →

Partial evidence

“Subtle Medical is a medical imaging software company.”

Source: RevenueBase Database · checked Sep 17, 2026
7Partial evidenceKolkata, IndiaHQ checked Sep 17, 202651-20060 contacts →

Partial evidence

“Frinksyn which is situated in West Bengal, India, where we provide workforce support for AI/Machine Learning Data Annotation and Content Moderation services, Having business…”

Source: RevenueBase Database · checked Sep 17, 2026
8Indirect evidenceBoston, MA, United StatesHQ checked Sep 17, 202651-20059 contacts →

Indirect evidence

“Centaur.ai data empowers you to build and deploy high-stakes AI.”

Source: RevenueBase Database · checked Sep 17, 2026
9Strong evidenceNew York, NY, United StatesHQ checked Sep 17, 2026501-1,00054 contacts →

Strong evidence

“At Keymakr, we provide exceptional image and video data annotation, data creation, data collection, and data validation services for AI/ML computer vision projects of all sizes.”

Source: RevenueBase Database · checked Sep 17, 2026
10Indirect evidenceHyderabad, IndiaHQ checked Sep 17, 202651-20047 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 17, 2026
11Indirect evidenceCherry Hill, NJ, United StatesHQ checked Sep 17, 202611-5039 contacts →

Indirect evidence

“Data Labeler specializes in providing reliable and high-quality training data sets for Machine Learning/Artificial Intelligence initiatives.”

Source: RevenueBase Database · checked Sep 17, 2026
12Indirect evidenceSan Diego, CA, United StatesHQ checked Sep 17, 202611-5037 contacts →

Indirect evidence

“CureMetrix is committed to the advancement of technology that improves disease detection and survival rates worldwide.”

Source: RevenueBase Database · checked Sep 17, 2026
13Indirect evidenceDublin, CA, United StatesHQ checked Sep 17, 202611-5036 contacts →

Indirect evidence

“More than just a PACS system, SARC MedIQ is a complete imaging workflow solution.”

Source: RevenueBase Database · checked Sep 17, 2026
14Indirect evidenceHyderabad, IndiaHQ checked Sep 17, 202611-5033 contacts →

Indirect evidence

“Marteck is a leading Healthcare & Technology company and has served worlds largest tech companies, Government and Hospitals.”

Source: RevenueBase Database · checked Sep 17, 2026
15Partial evidenceBoston, MA, United StatesHQ checked Sep 17, 202611-5031 contacts →

Partial evidence

“QMENTA is a Medical Imaging AI tech company that offers cloud native software solutions for imaging professionals and imaging clinical trials through one single platform.”

Source: RevenueBase Database · checked Sep 17, 2026
16Partial evidenceLos Angeles, CA, United StatesHQ checked Sep 17, 202611-5025 contacts →

Partial evidence

“VoxelCloud is a start-up company focused on medical artificial intelligence.”

Source: RevenueBase Database · checked Sep 17, 2026
17Partial evidenceSan Francisco, United StatesHQ checked Sep 17, 202651-20022 contacts →

Partial evidence

“StardustAI provides data annotation and data management services to global artificial intelligence companies.”

Source: RevenueBase Database · checked Sep 17, 2026
18Indirect evidenceStamford, CT, United StatesHQ checked Sep 17, 202611-5020 contacts →

Indirect evidence

“LifeVoXell.AI to provides a complete imaging and AI platform for Diagnostic Imaging Centers.”

Source: RevenueBase Database · checked Sep 17, 2026
19Indirect evidenceWilmington, United StatesHQ checked Sep 17, 202611-5019 contacts →

Indirect evidence

“Labellerr is a cutting-edge SaaS platform that accelerates AI development for organizations by offering AI-powered data labeling and automation.”

Source: RevenueBase Database · checked Sep 17, 2026
20Partial evidenceClaymonth, United StatesHQ checked Sep 17, 202611-5015 contacts →

Partial evidence

“Teams building medical imaging AI use RedBrick AI to build high quality training datasets.”

Source: RevenueBase Database · checked Sep 17, 2026
21Strong evidenceIndiaHQ checked Sep 17, 202651-20014 contacts →

Strong evidence

“Our image annotation experts, tools and our talented domain experts with years of experience ensure your image annotation projects are efficiently implemented.”

Source: RevenueBase Database · checked Sep 17, 2026
22Indirect evidenceMalda, IndiaHQ checked Sep 17, 202651-20014 contacts →

Indirect evidence

“Knuckle Head Corporation provides a whole gambit of Artificial Intelligence based services for various industries, such as : Healthcare, Finance, E-commerce, Retail, Telecom &…”

Source: RevenueBase Database · checked Sep 17, 2026
23Indirect evidenceNoida, IndiaHQ checked Sep 17, 20261-1013 contacts →

Indirect evidence

“Easiofy Solution is a AI in health company.”

Source: RevenueBase Database · checked Sep 17, 2026
24Indirect evidencePittsford, NY, United StatesHQ checked Sep 17, 202611-5010 contacts →

Indirect evidence

“See Beyond the Surface.”

Source: RevenueBase Database · checked Sep 17, 2026
25Indirect evidenceHouston, TX, United StatesHQ checked Sep 17, 20261-1010 contacts →

Indirect evidence

“LSR is a research services firm supporting clinical product research and development.”

Source: RevenueBase Database · checked Sep 17, 2026

Showing 25 of 110 medical image annotation companies worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 594 reachable decision-makers.

Free signup · no credit card

View the full list →

Medical image annotation companies worldwide at a glance

As of Sep 17, 2026
18.7%Verified-email coverage
28.8Average contacts per company
11-50Median size (employees)
8.2%Largest-city concentration · Kolkata
Sep 17, 2026Page data refreshed

Companies by employee count

1-10
32
11-50
46
51-200
24
201-500
4
501-1,000
4

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among medical image annotation companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage
2 countries, largest first: India, the United States. Country and city lists for medical image annotation companies are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “medical image annotation companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search
RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names medical image annotation companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude
Companies whose own description does not clearly place them among medical image annotation companies, and records with no verified work email.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every listed company carries at least one verified work email, 594 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 17, 2026. Lists refresh periodically as the graph is re-checked.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Medical image annotation companies by location

2 lists · largest first

Every Medical image 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 Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names medical image annotation companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many medical image annotation companies are there worldwide?

RevenueBase identified 110 medical image annotation companies worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Capestart, headquartered in Cambridge, tops this list with the largest team on record.

Which country has the most medical image annotation companies?

India leads with 64 companies, followed by the United States (46). Every medical image annotation companies list by country and city is linked on this page.

Which city has the most medical image annotation companies?

Kolkata leads with 9 headquartered companies, followed by Boston (6) and New York (5).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 594 verified decision-maker contacts tracked across these 110 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 17, 2026.

Ready to reach these companies? Verified emails and direct dials for all 110 medical image annotation companies worldwide. Start with a free account, no credit card.

Download this list →

Related lists

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 Smart Search, 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.