Our industry experts ranked the leading BPO companies in California by their specialization, client reviews, average cost and more. Use the handy filter to find your service provider in a matter of clicks.

Organic rankings are determined by five factors: top services, reviews, portfolio, awards/press, and team expertise. Sponsored listings pay for a placement that appears above organic positions. Sponsorship does not affect star ratings or review content - read more on our methodology page.

United States × California × Corporate Services × $1,000 - $10,000 ×Clear Filters
  • Innovative Solutions That Power Your Business

    Zventus is a global services provider of management consulting, staffing solutions, and outsourcing services that empower organizations to innovate, improve and grow their business...

    Top Services:

    • BPO
    Location
    Los Angeles, California
    Number of Employees
    100 - 249
    Average Hourly Rate
    $20/hr
    Minimal Budget
    $1,000 - $10,000

    Zventus Services

    • BPO
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Healthcare Industry
    • Insurance Industry
    • Fintech Industry
    Data sourced from the agency's DesignRush profile

    Zventus Reviews & Testimonials

    • Kaho Sakemi
      Kaho Sakemi Review from Google
      5.0★

      Kaho Sakemi's Review Sourced from Google

      Working at Zventus as a contractor has been one of the most insightful opportunities of my career. The projects I worked on were diverse and impactful, giving me hands-on experience in data analysis, marketing, and cross-functional collaboration. The leadership team is approachable, highly knowledgeable, and genuinely invested in helping you grow. The work culture is collaborative and supportive, making it easy to learn from colleagues and contribute meaningfully to company goals. I’ve gained valuable skills, industry knowledge, and professional connections that I hope to maintain with these individuals for years to come.

    • Harley Chen
      Harley Chen Review from Google
      5.0★

      Harley Chen's Review Sourced from Google

      I have just completed my four-month internship as an Associate Consulting Intern at Zventus, and I highly recommend this company as a place to work and intern.As a college student eager to break into the business world, I found Zventus to be an incredible launchpad. It provided me with the opportunity to apply what I’ve learned in school to real-world, client-oriented projects, while also engaging directly with senior management. Most importantly, they truly listen to your ideas and feedback.During my internship, I contributed to a variety of projects including market research, data analysis, marketing resource creation, business strategy, financial forecasting, and even project management. This diverse experience has been invaluable in preparing me for my future career.I have now secured an internship with a Fortune 500 company. My experience at Zventus was instrumental in this achievement. Not only was it my first internship in the U.S.—which significantly enhanced my resume—but it also gave me the deep knowledge and practical experience that became the highlight of my interview discussions.Thank you for all the amazing people here, each one of them is absolutely amazing to work with!

    • Gabriela Saavedra
      Gabriela Saavedra Review from Google
      1.0★

      Gabriela Saavedra's Review Sourced from Google

      I absolutely do not recommend working for this company. They are inefficient. If there is a problem, don't expect them to contact them, as they never show up. It seems like a school project where they never know what happened or who did what, and in the end, it's a collage of incomplete projects. They still want to pay the minimum and expect you to divide your time into three or four different activities. PLEASE DO NOT APPLY. This company is not worth it. They are inept, irresponsible, arrogant, and underpaid.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Your Reliable Billing Help

    Liberty Liens is a reliable partner for doctors across the United States. We handle billing, lien filing, claim tracking, and day-to-day support to make the complex side of practice management easier, faster, and more dependable...

    Top Services:

    • BPO
    Location
    Irvine, California
    Number of Employees
    100 - 249
    Average Hourly Rate
    $100/hr
    Minimal Budget
    $1,000 - $10,000

    Liberty Liens Services

    • BPO
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • American Family Care
    • Rapid Physician Services
    • Reassurance Home Health Care
    • El Lyon LLC
    Data sourced from the agency's DesignRush profile
  • Complete Enterprise Data Support - Data Entry, eCommerce Product Listing, Web Research, Data Mining,

    DataEntryIndia.in is a leading data management and BPO service provider with over 25 years of experience and 850+ full-time data experts...

    Top Services:

    • Market Research
    • BPO
    • Big Data Analytics
    • AI Development
    • Show more
    Location
    Laguna Beach, California
    Number of Employees
    500 - 999
    Average Hourly Rate
    $10/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    1 Project Listed

    DataEntryIndia.in Services

    • Market Research
    • BPO
    • Big Data Analytics
    • AI Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • EMC2
    • Corzen
    • Dalmia Cement
    • Lumens
    Data sourced from the agency's DesignRush profile
  • Run Your Entire Practice With One EHR+ Platform

    A new era of healthcare, a new world of practice well-being. We're redefining practice success at the crossroads of compassion and connectivity...

    Top Services:

    • BPO
    • Software Development
    Location
    Newport Beach, California
    Number of Employees
    500 - 999
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $1,000 - $10,000

    Tebra Services

    • BPO
    • Software Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • MGMA
    • Deloitte
    • AAFP
    Data sourced from the agency's DesignRush profile

    Tebra Reviews & Testimonials

    • Celia Gomes McGillivray
      Celia Gomes McGillivray Review from Google
      5.0★

      Celia Gomes McGillivray's Review Sourced from Google

      The representative was awesome. However, I still have to wait 3-5 business days for my provider account to be added so that I can write prescriptions.

    • Kendra Cole
      Kendra Cole Review from Google
      5.0★

      Kendra Cole's Review Sourced from Google

      Our company has been very pleased with Talisman billing services. Our representative Kishor is very responsive whenever we have questions about patient co-pays or balances. We are very satisfied with their billing services and I would highly recommend them to others!

    • J B
      J B Review from Google
      1.0★

      J B's Review Sourced from Google

      They are simply crooks. I told them multiple times to cancel my subscription and they continued to charge my credit card. Over $1000 in stolen charges. Hours on hold with a ridiculous inept customer service system that ran me in circles. I finally had to cancel my credit card. My emails were ignored. Stay away from this company.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Built Differently to Delight.

    QuisLex is an award-winning alternative legal services provider that specializes in managed document review, contract management, compliance services, legal spend management, and legal operations consulting...

    Top Services:

    • BPO
    • Business Consulting
    Location
    San Francisco, California
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $20/hr
    Minimal Budget
    $1,000 - $10,000

    Quislex Services

    • BPO
    • Business Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • London Interbank
    • Virtual Lunch
    • Priori
    Data sourced from the agency's DesignRush profile
  • AI-Enabled, Human-Validated Data Support, Engineered for Enterprises

    SunTec Data is a global leader in AI-enabled data, BPO, and KPO solutions, backed by over 25 years of experience and 1,500+ data professionals across 50+ countries. Combining advanced AI tools with human-in-the-loop oversight, we deliver ISO-certified, HIPAA-compliant data management...

    Top Services:

    • Market Research
    • BPO
    • Big Data Analytics
    • eCommerce
    • AI Development
    • Show more
    Location
    Laguna Beach, California
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    1 Project Listed

    SunTec Data Services

    • Market Research
    • BPO
    • Big Data Analytics
    • eCommerce
    • AI Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • PepsiCo
    • nielsen
    • Network18
    • Deloitte
    • Expedia
    • Pearson
    • DXL
    • DKSH
    Data sourced from the agency's DesignRush profile

    SunTec Data Reviews & Testimonials

    • Victor Cook
      Victor Cook Financial Analyst at Financial Services Company
      5.0★

      BPO Review from Victor Cook

      SunTec Data has been our outsourcing partner for the last three years. The team has considerably fueled our growth by providing financial data management and support.

    • Marc Hill
      Marc Hill Entrepreneur at Self-Employed
      5.0★

      BPO Review from Marc Hill

      We were delighted with the results offered by SunTec Data. The team aptly understood our requirements and delivered high-quality data management solutions. Highly recommend them!

    • Mike Robinson
      Mike Robinson Marketer at Undisclosed
      5.0★

      BPO Review from Mike Robinson

      Great job done by the team! They analyzed our requirements, maintained transparent communication, and delivered tailored contact lists. Would definitely work with them in the future!

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Our VAs Build Automation For You

    GoJarvis matches growing businesses with pre-trained virtual assistants who handle operations, sales support, and inbox management — while building custom automations that make your business run faster...

    Top Services:

    • BPO
    • HR Outsourcing
    • Customer Support
    • Phone Answering Services
    • Business Consulting
    • Show more
    Location
    Brea, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $10/hr
    Minimal Budget
    $1,000 - $10,000

    Jarvis Services

    • BPO
    • HR Outsourcing
    • Customer Support
    • Phone Answering Services
    • Business Consulting
    • Social Media Marketing
    • Email Marketing
    • Digital Marketing
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • eCommerce Industry
    • Retail Industry
    • Real Estate Industry
    Data sourced from the agency's DesignRush profile
  • Lead Generation At Startup Speed

    Startupr is an outbound lead generation agency built for B2B startups that need predictable pipeline without hiring an in-house SDR team...

    Top Services:

    • Digital Services
    • BPO
    Location
    Orange County, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $1,000 - $10,000

    Startupr Services

    • Digital Services
    • BPO
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • NexCom
    • Arounda
    • U1Core
    • Art & Science
    Data sourced from the agency's DesignRush profile

Why companies trust DesignRush

Every agency is independently vetted before it can be listed or ranked

1

Identity Check

We verify businesses and reviewer LinkedIn profiles for integrity.

Agencies vetted
125,882+
2

Portfolio Review

We review agency work, case studies, and results to confirm skill.

Applicants rejected
49%
3

Ongoing Audit

We monitor listings regularly; outdated agencies are removed.

Agencies verified
8

Some agencies pay for sponsored placement, clearly labeled and held to the same vetting standards.

See how rankings and monetization work.

ReceiveFreeProposals

For your project

1

Specify your budget, timeline and project requirements

2

Our experts curate a list of up to 5 most qualified candidate agencies

3

We connect you with them so you can choose the most suitable partner