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Home Data Annotation Services United States California

Top Data Annotation Services in California

Ratings Updated: November 4, 2026
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0 Leaders 15 Contenders

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18 Companies

Country: United States
State: California

List of the Top California Data Annotation Companies

  • Featured

    What are Featured Providers?

    Mindy Support Logotype

    Mindy Support

    4.8 37 reviews
    Verified
    Undisclosed
    Undisclosed
    1,000 - 9,999
    Serves California

    Services provided

    35% Data Annotation Services
    35% Customer Service Outsourcing
    30% Generative AI

    Mindy Support is a data annotation company specializing in services such as ML Data Annotation and Data Tagging Services. The company consistently receives positive feedback, with clients noting their ability to deliver projects on time and at a reasonable cost. Approximately 80% of reviewers highlight their responsiveness and flexibility as key strengths.

    See all 37 projects

    Reviews mention Easy to work with

    Clients consistently express that Mindy Support is easy to work with, highlighting their proactive communication and responsiveness. One client noted the team's positivity and readiness to assist, even with tedious requests. Another client emphasized the pleasant nature of their collaboration and effective communication. Overall, feedback indicates a strong sentiment of satisfaction with the ease of interaction and professionalism exhibited by Mindy Support throughout various projects.
    • Back-Office Services for Industrial Automation Company
      5.0 Feb 18, 2021

      The communication between our teams is quite good. They’re pleasant to work with and they do a good job. I can’t think of anything they could improve right now.

      Read Full Review
    • Image Annotation for Construction Technology Provider
      5.0 Feb 4, 2021

      Quick and easy coordination via e-mail or online meetings. They were easy to work with, flexible, and very friendly. No areas for improvement or something they could have done differently.

      Read Full Review
    • Customer Support Services for Walking App
      5.0 Apr 9, 2020

      When we needed to increase the diversity and complicity of tasks, Mindy Support’s team was very responsive, supportive and incredibly easy to work with. We appreciate how the Mindy Support project management team proactively seeks feedback and understands our requirements. Excellent. I couldn't ask for a more effective team.

      Read Full Review
    Read All Reviews
    1 of 2 Data Annotation Services reviews are 5 stars
    Unknown avg. project cost

    Data Annotation Services PROJECT HIGHLIGHT

    Data Annotation Services for Mapping Company

    4.5 — Mindy Support provides data annotation services for a mapping company. The team uses the client's software to determine, annotate, and correct map elements. Read more
    Read 2 Reviews

    Average Project Cost Breakdown

    Less than $10,000 (13) $10,000 to $49,000 (7) $50,000 to $199,999 (2)

    What Clients Have Said

    Mindy Support is consistently recognized for providing good value for money, with clients emphasizing their competitive pricing and quality of service. For instance, one client noted that Mindy Support offered a 'good value for cost' and another highlighted their 'excellent service at a reasonable price.' Overall, clients appreciate the balance between cost and quality, with many stating that Mindy Support's pricing is competitive compared to other vendors, making them a reliable choice for outsourcing.
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    View projects from:

    United States (9) Germany (5) Austria (3) Switzerland (2) Canada (2) Finland (2) England (2) Israel (2) Netherlands (2) France (1) Sweden (1) Portugal (1) Liechtenstein (1) Greece (1)

    This provider is fluent in 22 languages:

    • English
    • Spanish
    • Portuguese
    • German
    • French
    • Turkish
    • Italian
    • Polish
    • Ukrainian
    • Persian
    • Romanian
    • Dutch
    View all languages
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  • Task Virtual Logotype

    5.0 85 reviews
    Premier Verified Clutch Guarantee
    $1,000+
    < $25 / hr
    50 - 249
    San Diego, CA

    Services provided

    10% Data Annotation Services
    40% Back Office Outsourcing
    20% Sales Outsourcing +2 services
    20% Search Engine Optimization
    10% Call Center Services

    Task Virtual is a versatile virtual assistance and support company, providing services such as customer service, administrative support, data processing, SEO, and B2B lead generation. Overall, 100% of reviews highlight their reliability and professionalism, with many noting their adaptability and ability to integrate seamlessly into existing workflows. Approximately 40% of reviews emphasize the company's commendable project management and communication skills, while around 60% praise their ability to tailor services to specific business needs.

    See all 85 projects

    Reviews mention Flexible

    Task Virtual has consistently received positive feedback regarding its flexibility in adapting to client needs. Clients noted that Task Virtual was not merely executing tasks but was actively engaged in understanding their operations. One client highlighted that Task Virtual adjusted its processes quickly when priorities shifted, demonstrating a strong willingness to adapt. Another client emphasized the value of having a single partner manage diverse operational needs, which significantly eased coordination. Overall, the sentiment around flexibility is overwhelmingly positive, marking Task Virtual as a reliable and adaptable outsourcing partner.
    • BPO Services for Creative Design Agency
      5.0 May 17, 2022

      We're impressed with their ability to provide solutions to every problem. I have worked with many companies some of them do not adjust and try not to be flexible with any requirement that comes in. Obviously every company needs improvement nobody is perfect. We did face some issues, which we conveyed to them and they sorted out very quickly.

      Read Full Review
    • Sales, SEO & Back Office Support for Digital Media Agency
      5.0 Aug 19, 2026

      There were occasions where we had to clarify a requirement or adjust the workflow, especially when we introduced new types of assignments. What I appreciated was that the team didn't treat those changes as a problem. They asked questions, incorporated the feedback, and adjusted their approach. They also understood that agency work can change quickly. When a client deadline or internal priority shifted, we could communicate the change and the team was willing to adapt rather than rigidly following the original plan.

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    • Back Office Outsourcing for Transaction Platform
      5.0 Sep 3, 2026

      The flexibility was probably the biggest differentiator for us. Task Virtual wasn't just completing individual tasks from a checklist. As the team learned more about how we operated, they became more familiar with our expectations and were able to handle recurring responsibilities with less day-to-day direction. I also liked the fact that we could use the same partner for several different operational needs. Customer support, administrative assistance, data processing, and B2B lead generation are very different functions, but Task Virtual was able to support all of them within the same engagement. For a growing company, that flexibility is valuable because operational requirements can change quickly.

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    • Virtual Assistance Services for Fashion Retailer
      5.0 Sep 8, 2026

      The additional support also gave us greater flexibility during busier periods, when customer inquiries and administrative requests could increase quickly. What impressed me most was how quickly the Task Virtual team became comfortable with the practical details of our workflow. Their flexibility was another strong point. As our needs changed, we could communicate those changes and have the team adapt accordingly.

      Read Full Review
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    7 of 7 reviews are 5 stars
    Less than $10,000 avg. project cost

    Reviewed 7 times in the past 6 months

    Task Virtual has received positive feedback from clients over the past six months, highlighting its adaptability and effective support across various operational tasks. Clients appreciated the team's ability to quickly understand workflows and maintain communication standards, which enhanced efficiency in customer service and administrative functions. Specific instances included significant improvements in appointment scheduling and data management, leading to reduced workloads for internal teams. Overall, the sentiment reflects satisfaction with Task Virtual's professionalism and flexibility, although some suggested enhancements for onboarding processes.
    Read 7 Recent Reviews

    View projects from:

    United States (7) Canada (4) Ireland (4) Australia (1) Germany (1) Italy (1) Spain (1) England (1)

    This provider is fluent in 7 languages:

    • English
    • Spanish
    • French
    • Bengali
    • Hindi
    • Panjabi
    • Sindhi

    This provider is available in 12 time zones:

    • Middle East Time (MET)
    • India Standard Time (IST)
    • Central European Time (CET)
    • Central Standard Time (CST)
    • Eastern European Time (EET)
    • Eastern Standard Time (EST)
    • Pacific Standard Time (PST)
    • Australia Central Time (ACT)
    View all time zones

    San Diego, CA

    4275 Executive Square
    San Diego, CA 92037

    1

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  • Wexpand Logotype

    4.9 9 reviews
    Verified
    $1,000+
    < $25 / hr
    50 - 249
    Los Angeles, CA

    Services provided

    10% Data Annotation Services
    20% Staffing
    15% HR Outsourcing +5 services
    15% PEO/Employee Leasing
    10% BI & Big Data Consulting & SI
    10% Employer of Record (EOR) Services
    10% IT Staff Augmentation
    10% Recruiting

    Wexpand is an HR and recruitment agency specializing in sourcing, hiring, and managing high-quality talent across diverse industries. The company consistently receives positive feedback, with over 90% of reviews highlighting their efficient processes, cost-effectiveness, and excellent communication. Clients frequently commend Wexpand's ability to deliver tailored recruitment solutions and achieve impressive results, such as a 300%–400% increase in employee satisfaction.

    See all 9 projects

    Reviews mention High-quality work

    Clients consistently express high satisfaction with Wexpand's quality of work. One client noted that they delivered a batch of candidates within days, demonstrating efficiency and reliability. Another highlighted the significant increase in positive employee reviews and the loyalty of hires sourced by Wexpand. Feedback emphasized their proactive approach and ability to align with company needs, with one client stating, 'the quality of their work and the candidates they provided was great.' Overall sentiment reflects strong approval of Wexpand's services.
    • Recruitment for Outsourcing Company
      5.0 Sep 12, 2023

      Wexpand always communicates, resolves, and is dedicated to our partnership's timeline. Wexpand is consistent in their team management, that enables us to spend time elsewhere. Wexpand continues to evolve and technically advance as well, consistently giving us faster and better results.

      Read Full Review
    • HR & Recruitment Services for Moving Company
      5.0 Jun 17, 2022

      I’m most impressed with Wexpand’s ability to source, interview, and onboard high-quality candidates on such short notice. I also appreciate how they took the time to understand our company and our needs.

      Read Full Review
    • Recruitment Services for Film Production Company
      5.0 Jun 6, 2025

      Very customer oriented. Always looked for ways to solve any issue and very transparent when it comes to pricing - they didn't try to be the cheapest but the quality of their work and the candidates they provided was great.

      Read Full Review
    Read All Reviews

    Industry Experience

    Wexpand has demonstrated expertise across various industries, including Nonprofit, Motion Pictures, Software, Construction, Business Services, Consulting, and Transportation. Clients commend their exemplary project management, quick recruitment processes, and ability to provide culturally aligned talent. The overall sentiment is highly positive, with notable strengths in enhancing productivity, reducing costs, and fostering strong communication. Potential clients in these sectors can expect a tailored approach and effective solutions that align with their specific operational needs.

    Read All Reviews

    Select Industry to see insights

    Nonprofit Motion Pictures & Film Software Construction Business services Transportation Consulting

    View projects from:

    United States (8) Mexico (1)

    This provider is fluent in 3 languages:

    • English
    • Hebrew
    • Spanish

    This provider is available in 3 time zones:

    • Central Standard Time (CST)
    • Pacific Standard Time (PST)
    • Mountain Standard Time (MST)

    Los Angeles, CA

    1150 South Olive Street
    Los Angeles, CA 90015

    2 - 5

    +1 (206) 890 3956

    See All Locations (2)
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  • SalesForsaas Logotype

    Not yet reviewed

    $100,000+
    $300+ / hr
    10,000+
    San Francisco, CA

    Services provided

    30% Data Annotation Services
    25% CRM Consulting and SI
    25% Sales Outsourcing +1 service
    20% Generative AI

    Established in 1999, SalesForsaas is a Data Annotation Services company. Their services include Data Annotation Services and CRM consulting and SI.

    Read more
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  • INFOTANKS MEDIA Logotype

    Not yet reviewed

    $10,000+
    $100 - $149 / hr
    50 - 249
    Covina, CA

    Services provided

    30% Data Annotation Services
    10% Content Marketing
    10% Digital Strategy +5 services
    10% Email Marketing
    10% Pay Per Click
    10% Search Engine Optimization
    10% Social Media Marketing
    10% UX/UI Design

    Data Annotation Services company INFOTANKS MEDIA is based in Covina, California. They provide Data Annotation Services and Digital Strategy.

    Read more
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  • Labelbox Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    50 - 249
    San Francisco, CA

    Services provided

    60% Data Annotation Services
    20% AI Development
    20% Generative AI

    Labelbox, a Data Annotation Services company, was launched in 2018. The team focuses on Data Annotation Services and Artificial Intelligence.

    Read more
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  • OpenDrawing Logotype

    Not yet reviewed

    $1,000+
    $50 - $99 / hr
    10 - 49
    Costa Mesa, CA

    Services provided

    20% Data Annotation Services
    60% AI Development
    20% BI & Big Data Consulting & SI

    AI development company OpenDrawing focuses on Artificial Intelligence and Data Annotation Services. They were established in 2024.

    Read more
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  • BasicAI Inc Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    10 - 49
    Irvine, CA

    Services provided

    60% Data Annotation Services
    20% AI Development
    20% Generative AI

    Based in Irvine, California, BasicAI Inc is a small Data Annotation Services company. The team offers Data Annotation Services and Artificial Intelligence.

    Read more
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  • DBVON Data Solutions Logotype

    Not yet reviewed

    $10,000+
    $50 - $99 / hr
    2 - 9
    Glendale, CA

    Services provided

    20% Data Annotation Services
    30% BI & Big Data Consulting & SI
    20% Web Development +2 services
    15% Custom Software Development
    15% Low/No Code Development

    In Glendale, California, DBVON Data Solutions is a small big data analytics company. The team focuses on BI & big data consulting & SI and Data Annotation Services.

    Read more
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  • Big Data Rhino Logotype

    Not yet reviewed

    $50,000+
    Undisclosed
    10 - 49
    Carlsbad, CA

    Services provided

    20% Data Annotation Services
    30% AI Agents
    30% AI Development +1 service
    20% BI & Big Data Consulting & SI

    Big Data Rhino is an artificial intelligence firm. The Carlsbad, California-based company specializes in Artificial Intelligence and AI Agents.

    Read more
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  • Dataplatr Logotype

    Not yet reviewed

    $1,000+
    Undisclosed
    10 - 49
    Palo Alto, CA

    Services provided

    10% Data Annotation Services
    25% BI & Big Data Consulting & SI
    20% AI Consulting +5 services
    10% Business Consulting
    10% Cloud Consulting & SI
    10% Generative AI
    10% IT Managed Services
    5% Content Moderation Services

    Dataplatr is a big data company. They are located in Palo Alto, California and have small team of experts. Their services include BI & big data consulting & SI and AI Consulting.

    Read more
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  • Pantima Inc. Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    2 - 9
    San Francisco, CA

    Services provided

    60% Data Annotation Services
    40% AI Development

    Located in San Francisco, California and New York City, New York, Pantima Inc. Is a small Data Annotation Services company. Their services include Data Annotation Services and Artificial

    Read more
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  • Clarifai, Inc. Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    50 - 249
    San Francisco, CA

    Services provided

    20% Data Annotation Services
    20% AI Development
    20% API Development +2 services
    20% Content Moderation Services
    20% Generative AI

    Clarifai, Inc., an AI firm, is based in San Francisco, California. Their services include Artificial Intelligence and Content Moderation Services.

    Read more
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  • OpenCV.ai Logotype

    Not yet reviewed

    $50,000+
    $25 - $49 / hr
    50 - 249
    Palo Alto, CA

    Services provided

    10% Data Annotation Services
    45% AI Consulting
    35% AI Development +1 service
    10% Low/No Code Development

    OpenCV.ai is an AI firm. The company is based in Palo Alto, California. Their services include Artificial Intelligence and AI Consulting.

    Read more
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  • Hitech BPO Logotype

    5.0 2 reviews
    $5,000+
    < $25 / hr
    1,000 - 9,999
    Santa Clara, CA

    Services provided

    50% Data Annotation Services
    30% Back Office Outsourcing
    20% Document Digitization & Management

    Hitech BPO, established in 1992, is a leading business process outsourcing company. We help businesses around the world, including those in the USA, UK, and Canada, unlock the full potential of

    Read more
    See all 2 projects

    Santa Clara, CA

    547 Moreland Way
    Santa Clara, CA 95054

    50 - 75

    See All Locations (4)
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  • DataForce Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    250 - 999
    San Francisco, CA

    Services provided

    40% Data Annotation Services
    40% AI Development
    20% Generative AI

    DataForce is an artificial intelligence development company. Founded in 2012, the team focuses on Artificial Intelligence and Data Annotation Services.

    Read more
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  • Stardust AI Logotype

    Not yet reviewed

    Undisclosed
    Undisclosed
    10 - 49
    San Francisco, CA

    Services provided

    60% Data Annotation Services
    40% AI Development

    Founded in 2017, Stardust AI is a Data Annotation Services company. Their team focuses on Data Annotation Services and Artificial Intelligence.

    Read more
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  • Data-Entry-India.com Logotype

    4.5 1 review
    $1,000+
    < $25 / hr
    250 - 999
    Laguna Beach, CA

    Services provided

    40% Data Annotation Services
    15% Back Office Outsourcing
    15% Content Moderation Services +2 services
    15% Environmental Consulting
    15% Market Research

    Data-Entry-India.com offers a range of data enrichment services, including identifying and eliminating duplicate entries, updating invalid emails, and digitizing paper forms. Reviews highlight the company's responsiveness, professionalism, and ability to deliver accurate, timely results. Clients appreciate their attention to detail and proactive communication, making them a reliable partner for data-related projects.

    See all 1 projects

    Laguna Beach, CA

    1968 South Coast Highway
    Laguna Beach, CA 92651

    10 - 15

    +15852830055

    See All Locations (3)
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  • SunTec.ai Logotype

    Not yet reviewed

    $1,000+
    $25 - $49 / hr
    250 - 999
    Laguna Beach, CA

    Services provided

    30% Data Annotation Services
    20% Generative AI
    15% AI Agents +3 services
    15% Robotics Process Automation
    10% AI Consulting
    10% AI Development

    SunTec.ai is a Data Annotation Services company. They focus on Data Annotation Services and Generative AI and were launched in 1999.

    Read more

    Laguna Beach, CA

    1968 South Coast Highway
    Laguna Beach, CA 92651

    2 - 5

    +15852830055

    See All Locations (3)
    View Profile

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List of the Top California Data Annotation Companies

  1. SalesForsaas Logotype

    SalesForsaas

    $100,000+
    $300+ / hr
    10,000+
    San Francisco, CA

    Ability to deliver

    3/40.0
    0/20 Reviews
    0/10 Clients & Experience
    3/10 Market Presence

    Service focus

    30% Data Annotation Services
    70% Other
    View Profile Visit Website
  2. INFOTANKS MEDIA Logotype

    INFOTANKS MEDIA

    $10,000+
    $100 - $149 / hr
    50 - 249
    Covina, CA

    Ability to deliver

    4/40.0
    0/20 Reviews
    0/10 Clients & Experience
    4/10 Market Presence

    Service focus

    30% Data Annotation Services
    70% Other
    View Profile Visit Website
  3. Labelbox Logotype

    Labelbox

    Undisclosed
    Undisclosed
    50 - 249
    San Francisco, CA

    Ability to deliver

    0/40.0
    0/20 Reviews
    0/10 Clients & Experience
    0/10 Market Presence

    Service focus

    60% Data Annotation Services
    40% Other
    View Profile Visit Website
  4. OpenDrawing Logotype

    OpenDrawing

    $1,000+
    $50 - $99 / hr
    10 - 49
    Costa Mesa, CA

    Ability to deliver

    3.4/40.0
    0/20 Reviews
    0/10 Clients & Experience
    3.4/10 Market Presence

    Service focus

    20% Data Annotation Services
    80% Other
    View Profile Visit Website
  5. BasicAI Inc Logotype

    BasicAI Inc

    Undisclosed
    Undisclosed
    10 - 49
    Irvine, CA

    Ability to deliver

    0/40.0
    0/20 Reviews
    0/10 Clients & Experience
    0/10 Market Presence

    Service focus

    60% Data Annotation Services
    40% Other
    View Profile Visit Website
  6. DBVON Data Solutions Logotype

    DBVON Data Solutions

    $10,000+
    $50 - $99 / hr
    2 - 9
    Glendale, CA

    Ability to deliver

    3.4/40.0
    0/20 Reviews
    0/10 Clients & Experience
    3.4/10 Market Presence

    Service focus

    20% Data Annotation Services
    80% Other
    View Profile Visit Website
  7. Big Data Rhino Logotype

    Big Data Rhino

    $50,000+
    Undisclosed
    10 - 49
    Carlsbad, CA

    Ability to deliver

    3/40.0
    0/20 Reviews
    0/10 Clients & Experience
    3/10 Market Presence

    Service focus

    20% Data Annotation Services
    80% Other
    View Profile Visit Website
  8. Dataplatr Logotype

    Dataplatr

    $1,000+
    Undisclosed
    10 - 49
    Palo Alto, CA

    Ability to deliver

    3.7/40.0
    0/20 Reviews
    0/10 Clients & Experience
    3.7/10 Market Presence

    Service focus

    10% Data Annotation Services
    90% Other
    View Profile Visit Website
  9. Pantima Inc. Logotype

    Pantima Inc.

    Undisclosed
    Undisclosed
    2 - 9
    San Francisco, CA

    Ability to deliver

    0/40.0
    0/20 Reviews
    0/10 Clients & Experience
    0/10 Market Presence

    Service focus

    60% Data Annotation Services
    40% Other
    View Profile Visit Website
  10. Wexpand Logotype

    Wexpand

    $1,000+
    < $25 / hr
    50 - 249
    Los Angeles, CA

    Ability to deliver

    29.9/40.0
    16.4/20 Reviews
    9.9/10 Clients & Experience
    3.7/10 Market Presence

    Service focus

    10% Data Annotation Services
    90% Other
    View Profile Visit Website
  11. Clarifai, Inc. Logotype

    Clarifai, Inc.

    Undisclosed
    Undisclosed
    50 - 249
    San Francisco, CA

    Ability to deliver

    0/40.0
    0/20 Reviews
    0/10 Clients & Experience
    0/10 Market Presence

    Service focus

    20% Data Annotation Services
    80% Other
    View Profile Visit Website
  12. OpenCV.ai Logotype

    OpenCV.ai

    $50,000+
    $25 - $49 / hr
    50 - 249
    Palo Alto, CA

    Ability to deliver

    4.3/40.0
    0/20 Reviews
    0.1/10 Clients & Experience
    4.2/10 Market Presence

    Service focus

    10% Data Annotation Services
    90% Other
    View Profile Visit Website
  13. Hitech BPO Logotype

    Hitech BPO

    $5,000+
    < $25 / hr
    1,000 - 9,999
    Santa Clara, CA

    Ability to deliver

    4.2/40.0
    0/20 Reviews
    0/10 Clients & Experience
    4.2/10 Market Presence

    Service focus

    50% Data Annotation Services
    50% Other
    View Profile Visit Website
  14. DataForce Logotype

    DataForce

    Undisclosed
    Undisclosed
    250 - 999
    San Francisco, CA

    Ability to deliver

    0/40.0
    0/20 Reviews
    0/10 Clients & Experience
    0/10 Market Presence

    Service focus

    40% Data Annotation Services
    60% Other
    View Profile Visit Website
  15. Stardust AI Logotype

    Stardust AI

    Undisclosed
    Undisclosed
    10 - 49
    San Francisco, CA

    Ability to deliver

    0/40.0
    0/20 Reviews
    0/10 Clients & Experience
    0/10 Market Presence

    Service focus

    60% Data Annotation Services
    40% Other
    View Profile Visit Website

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