Home Data Annotation Services United States California

Top Data Annotation Services in California

Ratings Updated: February 25, 2026

We verify reviews and evaluate companies so you can choose with confidence. We may earn a fee for some placements. Learn how Clutch ensures trust

All Companies Leaders Matrix

Get Matched

1 Leaders 14 Contenders

15 Companies

Country: United States

State: California

List of the Top California Data Annotation Companies

Sponsored

Featured

What are Featured Providers?
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 company specializing in data annotation services, including data labeling, data categorization, and AI annotation. Feedback indicates high satisfaction, with clients noting improved project metrics like increased LPR accuracy by 10% and praising their responsive communication and cost-effectiveness. Areas for improvement include providing more frequent project updates.

See all 37 projects
Reviews mention Efficient
The overall sentiment regarding efficiency in Mindy Support's services is highly positive. Clients noted the 'seamless onboarding process' and 'well-organized project management' as key strengths. One client highlighted their 'quick and clear communication,' while another praised the 'highly efficient operators' provided for cell tracking projects. Overall, Mindy Support's ability to deliver on time and adapt to client needs contributed significantly to their reputation for efficiency, making them a reliable partner for various projects.

Call Center Services for Software Company

5.0 Jun 21, 2024

They are efficient, responsive, and showcase impressive flexibility, seamlessly adapting to our individual processes and needs. Together with Mindy, we launched several customer support streams in parallel, all successfully set up from scratch to launch. Their commitment to excellence and their ability to offer different solutions have significantly improved our customer communication and satisfaction.
Read Full Review

Cell Tracking for Research Institute

4.5 Dec 15, 2021

Communication between teams is good despite working remotely. We have always received the results quickly. They provided highly efficient operators at a profitable price.
Read Full Review

Annotation Assistance for Video Game Developer

5.0 Dec 9, 2021

Very efficient. The communication between our two teams is clear and open. The quality of the work accomplished and the rapidity with which the project was completed.
Read Full Review

Customer Service Outsourcing for Car Rental Company

4.5 Feb 26, 2025

Always present and on time efficient. Mindy Support provides excellent customer support service for several of our products and services.
Read Full Review

Read All Reviews

Was this helpful?

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

Was this helpful?

Industry Experience

Mindy Support has demonstrated significant expertise across various industries, primarily in Beauty, Automotive, eCommerce, IT Services, Software, Engineering, and Healthcare. Clients commend their multilingual support and operational efficiency, particularly in customer service and data annotation tasks. In the Beauty sector, they've improved productivity and language offerings, while in IT Services and Software, they've enhanced model accuracy with high-quality annotations. Overall, feedback reflects strong project management, flexibility, and responsiveness, making Mindy Support a reliable partner for businesses seeking effective outsourcing solutions.
Read All Reviews

Select Industry to see insights

Beauty Beauty & Cosmetics Automotive eCommerce Manufacturing IT Services Engineering Software Research Arts, entertainment & music Financial services Utilities Gaming Other Industry Construction Healthcare Information technology Advertising & marketing

Was this helpful?

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
Clients consistently highlight Mindy Support's competitive pricing and excellent value for money. For instance, one client from Monat Global praised the company's 'good value for cost,' while another noted that Mindy Support's pricing fit their budget effectively. Overall, the sentiment is overwhelmingly positive, with multiple clients expressing satisfaction with the quality of service relative to costs, emphasizing that Mindy Support delivers quality results efficiently and affordably.
Read All Reviews

Was this helpful?
View Profile Visit Website
Second Talent

5.0 18 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 staffing and IT staff augmentation company specializing in sourcing, screening, and placing skilled remote engineers. Reviews reveal a consistently positive experience, with 100% of feedback highlighting their reliable project management, seamless communication, and swift onboarding processes. Clients appreciate their efficient subscription model and alignment with company values, though a few suggest expanding their range of senior profiles to enhance service offerings further.

See all 18 projects

5 of 5 reviews are 5 stars

Unknown avg. project cost

Reviewed 5 times in the past 6 months
Recent reviews of Second Talent highlight a strong overall sentiment of reliability and efficiency. Clients praised their ability to quickly onboard skilled engineers, significantly reducing hiring timelines and enhancing team productivity. Notably, one client emphasized the seamless integration of Second Talent as an extension of their HR team, while another commended their clear communication and proactive support. Areas for improvement include a request for a broader range of senior profiles, but overall, experiences were overwhelmingly positive.
Read 5 Recent Reviews

Was this helpful?

Industry Experience

Second Talent has demonstrated expertise in various industries, particularly in software development, AI solutions, and e-commerce. Clients across these sectors have praised their swift onboarding, effective project management, and alignment with company values. The overall sentiment reflects satisfaction with their ability to provide skilled engineers quickly while maintaining quality and compliance. Their subscription-based model has been highlighted as a significant strength, making them a suitable choice for organizations seeking efficient team expansion and IT staff augmentation.
Read All Reviews

Select Industry to see insights

Other industries Information technology

Was this helpful?

Average Project Cost Breakdown

What Clients Have Said
Clients consistently highlight Second Talent's strong value for money, noting their competitive pricing and effective subscription model. For instance, one client mentioned that the pricing fit their budget while another praised the good value for cost, leading to significant improvements in hiring efficiency and team productivity. Overall, the sentiment is positive, with clients appreciating the seamless process and the high-quality talent provided without the usual complexities of traditional hiring.
Read All Reviews

Was this helpful?

View projects from:

United States (4) Georgia (1)

Was this helpful?

View Profile
SunTec.ai

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

View Profile
Data-Entry-India.com

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.

See all 1 projects

View Profile

Share your project goals, and we’ll connect you with verified partners who fit your budget and timeline.

Get My Matches

SalesForsaas

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

View Profile
INFOTANKS MEDIA

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

View Profile
Labelbox

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

View Profile
Big Data Rhino

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

View Profile
Dataplatr

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

View Profile
BasicAI Inc

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

View Profile
Pantima Inc.

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

View Profile
Clarifai, Inc.

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

View Profile
OpenCV.ai

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

View Profile
Hitech BPO

5.0 2 reviews

$5,000+

< $25 / hr

1,000 - 9,999

New York, NY

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

New York, NY

50 Riverside Drive
New York, NY 10023
50 - 75

See All Locations (4)

Was this helpful?

View Profile
DataForce

Not yet reviewed

Undisclosed

Undisclosed

250 - 999

New York, NY

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

New York, NY

Three Park Avenue, 39th Floor
New York, NY 10016
2 - 5

+1.212.689.5555

See All Locations (3)

Was this helpful?

View Profile
Stardust AI

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

View Profile

Tell us what you need — we’ll match you with top agencies in minutes.

Get My Matches

Why Trust Clutch

At Clutch, we believe trust is the foundation of every business relationship. Our mission is to help buyers make confident, data-backed decisions informed by real client experiences.

Every review on Clutch undergoes a rigorous, human-led verification process to make sure it’s valid. Our team of specialists confirms the identity of each reviewer, ensures the project is legitimate, and only publishes reviews that meet our strict criteria.

Verification doesn’t stop at the point of publication. Our Trust & Safety team routinely audits older reviews against our guidelines. When reviews fall short of our standards, we remove them.

We evaluate service providers using a structured methodology that combines:

In-depth client interviews and ratings
Comprehensive project details
Market presence
Portfolio examples and industry recognition

This data powers tools like the Leaders Matrix, which helps you compare agencies directly. Our research team curates rankings by weighing verified reviews most heavily, so the most trusted and experienced providers rise to the top.

Using this unique combination of verified client feedback and provider-supplied insights, Clutch distills the most important details into clear, digestible summaries so you have everything you need to make confident, informed decisions quickly.

We take fraud seriously. Providers who violate our guidelines may face lower rankings, restricted visibility, or removal from the platform altogether.

Clutch’s commitment to transparency is ongoing. We’re constantly refining our systems to protect the integrity of reviews and support you in finding the right agency.

Ability to deliver

Focus

Proven

Market Leaders

Emerging

Niche

Clutch Leaders Matrix

Rollover to see company insights or click a company below for more details.

1 Second Talent

A Clutch Leaders Matrix provides a broad view of the top-performing companies in a particular service or location. Each company featured in a Leaders Matrix is evaluated based on Focus and Ability to Deliver. The size of each circle indicates that company’s size.

By using verified reviews, focused service details, and real project data, the Leaders Matrix highlights companies that consistently deliver and stand out from the rest. Each company’s position is based on how well they focus on a service area and how consistently they deliver results, helping you make informed, confident decisions. Learn More

Focus (x-axis)

Focus accounts for a company’s specialization within a certain service.

Ability to Deliver (y-axis)

Ability to Deliver considers three criteria:

Client feedback and reviews
Work experience and previous projects
Market presence and reputation in the industry

List of the Top 1 California Data Annotation Companies

Second Talent

Undisclosed

Undisclosed

50 - 249

San Francisco, CA

Ability to deliver

23/40.0

17.4/20 Reviews

0/10 Clients & Experience

5.6/10 Market Presence

Service focus

10% Data Annotation Services

90% Other

View Profile Visit Website
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
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
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
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
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
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
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
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
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
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
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
Hitech BPO

$5,000+

< $25 / hr

1,000 - 9,999

Ahmedabad, India

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
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
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

Get personalized agency matches based on your project goals.

Top Data Annotation Services in California

List of the Top California Data Annotation Companies

Reviews mention Efficient

Call Center Services for Software Company

Cell Tracking for Research Institute

Annotation Assistance for Video Game Developer

Customer Service Outsourcing for Car Rental Company

Data Annotation Services for Mapping Company

Industry Experience

Select Industry to see insights

Average Project Cost Breakdown

What Clients Have Said

Reviewed 5 times in the past 6 months