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Home Data Annotation Services United States California

Top Data Annotation Services in California

Ratings Updated: June 7, 2026
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1 Leaders 15 Contenders

16 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
    Premier 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 AI and ML data labeling, data tagging, and data classification. Reviewers noted their excellent project management skills and cost-effectiveness, with 100% highlighting their responsiveness and timely delivery. Approximately 50% mentioned their alignment with company values and flexibility. Improvements could include more frequent status updates.

    See all 37 projects

    Reviews mention Positive attitude

    Mindy Support has received commendations for their positive attitude, with clients noting that their staff is always ready to help, even with tedious requests. One client highlighted the professionalism and politeness of the sales representative, as well as the proactive approach to feedback. Overall, the sentiment reflects a high level of satisfaction, with clients appreciating the team's willingness to assist and their constructive response to feedback.
    • Customer Support for Interactive Gaming Platform
      5.0 May 10, 2021

      The staff have always been very positive and always ready to help. Even with our more tedious requests, which we have really appreciated.

      Read Full Review
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    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 has consistently been recognized for its competitive pricing and overall value. Clients have highlighted the company's ability to provide quality services at reasonable costs, with one stating, 'Good value for cost.' Another mentioned, 'Pricing fit our budget,' underscoring the affordability of their services. Overall, feedback reflects a positive sentiment regarding cost-effectiveness, with clients appreciating the balance between quality and affordability, making Mindy Support a reliable choice for outsourcing needs.
    Read All Reviews

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    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)
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  • Second Talent Logotype

    4.9 25 reviews
    Undisclosed
    Undisclosed
    50 - 249
    San Francisco, CA

    Services provided

    10% Data Annotation Services
    60% IT Staff Augmentation
    30% Employer of Record (EOR) Services

    Second Talent is a recruitment firm specializing in IT staffing and remote engineering support. The company is highly regarded for its structured hiring process and efficient project management, with 100% of reviewers highlighting their reliability and ability to meet deadlines. Clients appreciate their market knowledge and adaptability, though some suggest initial briefings could be more structured.

    See all 25 projects

    Reviews mention Reliable

    Clients consistently highlight Second Talent's reliability, noting their dependable project management and timely communication. One IT Manager praised their straightforward approach, stating, "Their project management was straightforward and dependable," while another emphasized the team's reliability by stating, "The team was reliable and met all expectations throughout the engagement." Overall, the sentiment reflects a strong trust in Second Talent's ability to deliver consistent results without overpromising, contributing to a smooth partnership.
    • IT Staff Augmentation for AI-Driven E-Commerce Platform
      5.0 Nov 28, 2025

      Their project management was straightforward and dependable. Requests were acknowledged quickly, updates were timely, and any adjustments we needed were handled without friction. They consistently delivered on expectations, kept communication clear, and ensured we always had visibility into next steps.

      Read Full Review
    • IT Staff Augmentation for AI-Driven E-Commerce Platform
      5.0 Nov 28, 2025

      What stood out most was how consistently reliable they were, no overpromising, no surprises, just steady delivery and a clear understanding of what teams actually need to stay productive. Their blend of practical execution, responsive support, and genuinely thoughtful communication made the partnership feel unusually smooth compared to similar providers.

      Read Full Review
    Read All Reviews
    6 of 6 reviews are 5 stars
    $10,000 – $49,000 avg. project cost

    Reviewed 6 times in the past 6 months

    In the past six months, client feedback for Second Talent has been overwhelmingly positive. Clients highlighted their effective end-to-end recruitment process, timely communication, and ability to deliver quality candidates quickly, leading to improved project execution and productivity. One client noted, 'Their blend of practical execution and responsive support made the partnership feel unusually smooth.' Areas for improvement mentioned include the desire for a more structured kickoff process and a broader range of senior profiles.
    Read 6 Recent Reviews

    Industry Experience

    Second Talent has effectively served the Information Technology and AI sectors, providing skilled remote engineers and IT staff augmentation. Clients praised their reliability, speedy onboarding processes, and seamless communication. Notable outcomes included a significant reduction in hiring time and improved team productivity. Their subscription model was particularly well-received in various industries, ensuring consistent access to top talent. Overall, the provider demonstrated strong expertise in tech-focused projects, making them an excellent fit for companies requiring agile and efficient engineering support.

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    Select Industry to see insights

    Other industries Information technology

    Average Project Cost Breakdown

    $10,000 to $49,000 (1)

    What Clients Have Said

    Clients consistently highlighted Second Talent's competitive pricing and overall value for money. Feedback noted their 'good value for cost' and 'pricing fit our budget.' Additionally, the subscription model was praised for simplifying team expansion and providing predictable costs. Overall, the sentiment was positive, with clients expressing satisfaction with the return on investment through faster hiring processes and enhanced team productivity, indicating that the company delivers strong value relative to its pricing.
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  • SunTec.ai Logotype

    Not yet reviewed

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

    Services provided

    35% Data Annotation Services
    30% Generative AI
    20% AI Consulting +1 service
    15% AI Development

    Launched in 1999, SunTec.ai is a midsize Data Annotation Services company. Their team offers Data Annotation Services and Generative AI.

    Read more
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  • Data-Entry-India.com Logotype

    4.5 1 review
    Undisclosed
    Undisclosed
    250 - 999
    Laguna Beach, CA

    Services provided

    25% Data Annotation Services
    20% Generative AI
    15% AI Consulting +4 services
    15% BI & Big Data Consulting & SI
    15% Market Research
    5% Back Office Outsourcing
    5% Blockchain

    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.

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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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  • 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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  • 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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  • 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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  • 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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  • 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
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    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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1 Second Talent

List of the Top 1 California Data Annotation Companies

  1. Second Talent Logotype

    Second Talent

    Undisclosed
    Undisclosed
    50 - 249
    San Francisco, CA

    Ability to deliver

    23.7/40.0
    18/20 Reviews
    0/10 Clients & Experience
    5.7/10 Market Presence

    Service focus

    10% Data Annotation Services
    90% Other
    View Profile Visit Website
  2. SunTec.ai Logotype

    SunTec.ai

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

    Ability to deliver

    5.2/40.0
    0/20 Reviews
    0/10 Clients & Experience
    5.2/10 Market Presence

    Service focus

    35% Data Annotation Services
    65% Other
    View Profile Visit Website
  3. Data-Entry-India.com Logotype

    Data-Entry-India.com

    Undisclosed
    Undisclosed
    250 - 999
    Laguna Beach, CA

    Ability to deliver

    6.4/40.0
    0/20 Reviews
    0/10 Clients & Experience
    6.4/10 Market Presence

    Service focus

    25% Data Annotation Services
    75% Other
    View Profile Visit Website
  4. SalesForsaas Logotype

    SalesForsaas

    $100,000+
    $300+ / hr
    10,000+
    San Francisco, 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
  5. INFOTANKS MEDIA Logotype

    INFOTANKS MEDIA

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

    Ability to deliver

    5.3/40.0
    0/20 Reviews
    0/10 Clients & Experience
    5.3/10 Market Presence

    Service focus

    30% Data Annotation Services
    70% Other
    View Profile Visit Website
  6. OpenDrawing Logotype

    OpenDrawing

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

    Ability to deliver

    4.6/40.0
    0/20 Reviews
    0/10 Clients & Experience
    4.6/10 Market Presence

    Service focus

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

    Big Data Rhino

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

    Ability to deliver

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

    Service focus

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

    Dataplatr

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

    Ability to deliver

    4.9/40.0
    0/20 Reviews
    0/10 Clients & Experience
    4.9/10 Market Presence

    Service focus

    10% Data Annotation Services
    90% Other
    View Profile Visit Website
  10. 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
  11. 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
  12. 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
  13. OpenCV.ai Logotype

    OpenCV.ai

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

    Ability to deliver

    6.5/40.0
    0/20 Reviews
    0.1/10 Clients & Experience
    6.4/10 Market Presence

    Service focus

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

    Hitech BPO

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

    Ability to deliver

    7.1/40.0
    0/20 Reviews
    0/10 Clients & Experience
    7.1/10 Market Presence

    Service focus

    50% Data Annotation Services
    50% Other
    View Profile Visit Website
  15. 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
  16. 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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