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.
Martal Group is an award-winning B2B lead generation and sales agency specializing in scaling tech businesses. Since 2009, our top-performing sales executives have been instrumental in generating qualified leads for over 2,000 B2B organizations, ranging from startups to Fortune 500 companies...
Top Services:
Marketing Review from Nidhi Jaiswal
From the very start, their team was very professional, communicated in a timely manner, and was very familiar with B2B lead generation. We were just surprised at their team culture and their desire to work hand-in-hand with our team. It felt like they were not an external vendor but a true partner in all respects.Throughout our working time together, Martal always produced excellent work while keeping us informed and engaged. They are solution-oriented, proactive, and willing to share ideas that enhance performance. It is not often that you find a team that is so concerned about your success.What we value most is their honesty and commitment to building something that will last. They don't seek quick wins but work to build outcomes that last and can potentially expand. With their experience combined with a well-structured plan, they are a reliable and outcome-driven collaborator.If you need to reach more customers and you would like to have a company that is concerned about your success, you can rely on Martal Group. We highly recommend that you use their services.
Digital Marketing Review from Anas Aftab
Working with Martal Group has been an absolute pleasure. Their team is collaborative and transparent and consistently delivers on their commitments with professionalism and expertise. From the start, it was clear they are passionate about building meaningful and lasting business relationships.What stands out most is their willingness to go above and beyond. Whether its sharing valuable insights, offering timely support, or simply being approachable and helpful, Martal Group has proven to be a reliable partner. Their depth of knowledge in the B2B space, paired with a genuine dedication to helping businesses grow, makes them a standout organization.If you're looking for a team that values collaboration, transparency, and long-term success, Martal Group is an excellent choice.
Call Centers Review from Doug McLean
Martal Group was able to facilitate Complete EDI’s first ever outbound lead generation efforts in the company’s history. Following the onboarding process, Martal was able to deliver 2 sales-qualified leads within the second week of campaigns and by the end of the 3 month pilot period had 14 sales-qualified leads.
Offering Call Center Services. In today’s fast-paced business environment, a missed call equals a missed customer. Enter TAS United. Our experienced, bilingual agents answer your calls when you can’t – keeping you connected to your patients or customers 24/7/365...
Top Services:
.png)
Phone Answering Services Review from Cerena Schane
Partnering with TAS United not only helped save us money by outsourcing our call traffic, but enhanced our first impression with our customers. Beyond the ongoing and future savings, TAS United has allowed us to capitalize on more opportunities for new business. We have been able to eliminate significant time spent on the phones.
Call Centers Review from Viktoriia Bielkova
My experience using TAS United is very positive. Since TAS United is highly professional, responsive and client oriented. They provide a great service! I highly recommend TAS United as your business partner.
Phone Answering Services Review from Dr. Shiree Flume
I have been a customer of TAS United since 1989 and have been very satisfied with the service. The operators have helped many of my patients who were in mental health crisis over the years and their kindness and professionalism are much appreciated.
We provide proven and specialized eCommerce professionals to support and grow your business...
Top Services:
Business process outsourcing (BPO) is a valuable strategy for companies seeking new ways to achieve high performance by controlling costs, reducing risk, and focusing on core compentencies. SoftFile offers our clients a unique blend of technology and highly trained labor to assist you with your day-to-day...
Top Services:
Anonymous Person's Review Sourced from Google
I was interviewed by the production manager, Chen Saeturn for Document Preparation Clerk position back in May and he was very unprofessional. He asked me questions that wasn’t work related or had anything to do with the interview. It was some gaslighting questions. So rude and unprofessional like it seems like he didn’t want me to work there! But it’s okay. I’m glad that I wasn’t moving forward or working here!
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:
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'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'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.
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:
Wing is a managed assistant service that places dedicated, AI-trained assistants inside growing companies and healthcare practices. Wing handles recruiting, training, and oversight, so clients get coverage they direct without managing performance, replacements, or continuity themselves. Assistants work inside...
Top Services:
With a legacy dating back to 2016, HiredSupport stands as a true trailblazer in the outsourced customer support realm...
Top Services:
Influx.com is the #1 on-demand service partner for growing brands. Since 2013, Influx has been trusted by 750+ brands & delivered fully managed, on-brand support, 24/7, on month-to-month plans. Our human + AI teams deliver better customer experience for e-commerce, SaaS, Tech brands worldwide...
Top Services:
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:
CodeFulcrum is an agile and progressive software company. Specializing in web, mobile and enterprise software development. Delivering products that are both visually stunning and technically ambitious with an unparalleled level of expertise...
Top Services:
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:
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'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'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.
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:
IQ BackOffice is the leading accounting automation provider, offering 99.97% quality and up to 68% savings to companies around the globe...
Top Services:
VargasAndrews is an international professional services firm specializing in business transformations and turnarounds. Our vision is to become an international market leader in business & digital transformations. We exist to transform businesses and business owner's quality of life. We are motivated and...
Top Services:
Conlon & Company is an accounting firm committed to providing close, personal attention to our clients. We believe in the value of relationships. We view every client relationship like a partnership, and truly believe that our success is a result of your success...
Top Services:
Ann Merley's Review Sourced from Google
Our first tax season as remote clients of Conlon @Co. but it went off with only a minor glitch or two. We got the same personal, prompt, and attentive service as ever. We are grateful for Conlon!Ann and Clint Merley
Debra Honan's Review Sourced from Google
We have done our taxes here for years and trust them to do them correctly and efficiently! We have also given their name to several friends and family who use them also. Could not ask for a better company to trust with our taxes!
Bryan Farmer's Review Sourced from Google
Have used their tax services for years and highly recommended. There is usually a decent array of treats in the bowl at the reception desk.
We match the best global remote professionals specializing in sales, customer service, bookkeeping, and tech services for US-based brands...
Top Services:
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:
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.
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!
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!
We designed our advanced business and accounting services to better help your business establish a solid foundation for growth. You can customize your service package further by adding payroll, accounting, human resources, tax preparation or any of our other help you might require in addition to business...
Top Services:
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:
VSynergize is a Global Sales and Marketing services provider. The team is fully devoted to the success of its clients and partners, particularly when it comes to Customer Profiling, Content Creation & Syndication, Lead Generation & Nurturing, Demand Generation, Appointment Setting, BANT Leads, Delivering...
Top Services:
HIghPower call center is world renown near shore call center located in the heart of Tijuana minutes from the U.S border. Our team is bilingual, professional, and driven by performance goals. Our Call Center is second to none complete with a corporate structure and professional work environment...
Top Services:
Nheam Hossine's Review Sourced from Google
I grew my bussiness over 70% working with them, they offer the highest quality call service and have made running my bussiness a lot easier! Highly recommend!
Sami nomair's Review Sourced from Google
I have been outsourcing my call center for years and I have finally found a company that is amazing not only in customer service but also in sales . Really competitive in pricing and also always delivers the best results. They have helped me grow my business by 20 percent just this year alone .
In business since 1979, Tel-Us Call Center offers a variety of inbound call center services customized to suit the needs of its clients. Our well-trained staff of bilingual agents is available 24/7/365...
Top Services:
Anna Schmick's Review Sourced from Google
⭐️⭐️⭐️⭐️⭐️Outstanding Service and Results!My customers have had a fantastic experience working withTel-Us Call Center Inc. The team is consistently professional, responsive, and genuinely committed to delivering top-tier customer service. They manage call flow efficiently while ensuring every caller is treated with care and attention.Clients often mention how smooth the onboarding process was and how seamless communication has been with the Tel-Us staff. Since partnering with Tel-Us, many have seen a clear improvement in their own customer satisfaction.Highly recommended!
Mr Lue's Review Sourced from Google
We've been working with Tel-Us for years and they are some of the most professional and accomodating agents I have ever dealt with.
Erin Choi's Review Sourced from Google
We’ve had a great experience working with Tel-US over the past year. Their team is responsive, easy to communicate with, and consistently delivers excellent service to both us and our patients. We feel confident knowing our patients are well cared for after hours. Thank you Stacy, Cheryl, and team for all that you do!
FLINK Business Solutions is an outsourcing company specialized in back-office operations for insurance providers. We serve Insurance Carriers, MGAs, Brokers, & wholesale brokers. We’ve founded FLINK as an answer to the globally growing business demand for outsourcing and to provide business solutions to...
Top Services:
GlobalityNet helps small and midsize companies reduce costs and thrive through supply chain and operations consultancy or through our outsourcing services. While based in Pasadena, CA, we have teams in the U.S. and globally to help you with your projects...
Top Services:
Joann Mak's Review Sourced from Google
We are grateful for the opportunity to work with Globalitynet. Their methodical approach and the ability to analyze data elevated our company performance. Root Cause Analysis, KPIs and Supplier Score Cards all seem easy under their professional services and supervision.
Loc H's Review Sourced from Google
GlobalityNet helped us achieve our targets. They are very hands-on and are easy to work with.
Cube Accounting Solutions bookkeeping firm based in Newport Beach is one of the most preferred outsourced end-to-end bookkeeping service providers...
Top Services:
Startupr is an outbound lead generation agency built for B2B startups that need predictable pipeline without hiring an in-house SDR team...
Top Services:
Xassure by eDesk is a trusted customer support and back-office solutions provider helping businesses deliver exceptional customer experiences. We specialize in chat support, email support, voice support, and administrative services designed to reduce workload and improve operational efficiency...
Top Services:
Revix MD provides medical billing, revenue cycle management, medical coding, claims processing, denial management, AR recovery, and practice management services for healthcare providers across the United States...
Top Services:
George Gamouras, MD's Review Sourced from Google
This billing company is thorough and very accomodating to our needs. They also make sure to process claims in a timely manner.
Our firm offers a wide range of services to our individual and business clients. Because our firm is relatively small, our clients benefit by getting personalized, quality service that is beyond comparison...
Top Services:
Ken Besada's Review Sourced from Google
Cannot say enough amazing things about Team Fenton. These guys run an incredibly tight ship. Every interaction I have with his staff, makes me ever more grateful to have them in my corner. I have referred about a dozen new clients to their firm based on my experience and they all share the same sentiment and gratitude.
Christian MacCarron's Review Sourced from Google
These people are complete clowns and awful at client service. They opted to terminate a multi-year relationship over Thanksgiving with no heads up around frustrations or issues. I would not recommend this group as they are not a true professional services firm. 0 stars if I could offer that.
Sean McCarthy's Review Sourced from Google
Experts, fantastic service. They cover individual and small business. I've been with them a decade and couldn't be happier.
Every agency is independently vetted before it can be listed or ranked
Some agencies pay for sponsored placement, clearly labeled and held to the same vetting standards.
ProposalsFor your project
Specify your budget, timeline and project requirements
Our experts curate a list of up to 5 most qualified candidate agencies
We connect you with them so you can choose the most suitable partner
4.7
4.7-preview-webp.webp)