Explore the top-rated call centers in California that offer a variety of telecommunication services for your business. Use our practical filter to select your ideal partner by budget, client reviews, team size and more.

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 × Software & IT Services × Sort by: Organic Rankings ×Clear Filters
  • Qualified Leads In Your Pipeline

    Pipeful runs B2B appointment setting and lead generation campaigns using AI-assisted targeting, cold email outreach, and SDR-led qualification across 180+ countries. The agency draws from a database of 300 million verified business emails spanning 75+ industries and serves clients globally...

    Top Services:

    • Email Marketing
    • Direct Marketing
    • Call Centers
    Location
    San Francisco, California
    Number of Employees
    100 - 249
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    6 Projects Listed

    Pipeful Services

    • Email Marketing
    • Direct Marketing
    • Call Centers
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Google
    • Societe Generale
    • Seismic
    • Tenstorrent
    • Yotpo
    • Microsoft
    Data sourced from the agency's DesignRush profile

    Pipeful Reviews & Testimonials

    • Lucas Delacroix
      Lucas Delacroix Financial Director at BNP Paribas
      5.0★

      Lead Generation Review from Lucas Delacroix

      Prior to teaming up with Pipeful, we faced challenges in reaching potential clients efficiently. With their expertise, Pipeful crafted customized email campaigns and pinpointed high-quality leads. Consequently, we successfully met our Key Performance Indicators (KPIs), scheduled numerous face-to-face meetings, and broadened our sales pipeline. Their assistance not only saved us time but also heightened our likelihood of closing deals.Pipeful went above and beyond our expectations, surpassing our KPIs by 150% in the initial month and securing an impressive 49 face-to-face appointments for our sales team within just two months. Their expertise in creating impactful email campaigns and identifying high-quality leads proved to be invaluable. Additionally, their team's culture is outstanding they are not only intelligent and highly skilled but also exceptionally responsive.High-quality agencies may sometimes come with a slightly higher price tag.I strongly recommend their services for efficient lead generation and appointment booking. Their expertise and performance are evident, and the team's responsiveness and intelligence significantly enhance the collaboration.

    • Guillaume Leclerc
      Guillaume Leclerc Financial Officer at Sanofi
      5.0★

      Lead Generation Review from Guillaume Leclerc

      We opted to explore a lead acquisition agency as we aimed to elevate our business to a higher tier. Recognizing our current lack of expertise in this area, we decided it was prudent to enlist the assistance of professionals. Pipeful assumed key responsibilities, such as pinpointing and drawing in potential clients, arranging meetings with decision-makers, and ensuring genuine interest from prospects in our services. The outcome has left us elated, with a total of 60 confirmed appointments featuring clients who meet our criteria. This level of success is unprecedented in our past experiences.We have successfully secured 120 confirmed appointments with promising leads.The sales pipeline has been expanded, opening up new opportunities for business expansion.We are content with the overall partnership and the caliber of leads that have been generated.Ensure a thorough examination of Pipeful's track record and personalized strategy before engaging their services for lead generation and sales development. To maximize the benefits of your collaboration, clearly define your objectives and goals, and prioritize open communication, honest feedback, and transparent reporting.

    • Léo Fontaine
      Léo Fontaine Commercial Director at Airbus
      5.0★

      Lead Generation Review from Léo Fontaine

      Finding clients has consistently been the biggest challenge for our team. However, thanks to Pipeful, our pipeline is growing rapidly. In just one year of working with Pipeful, we closed more deals than we could have imagined. The success has led us to hire two additional sales managers to effectively handle the leads generated by Pipeful and facilitate faster scaling. Pipeful exceeded my expectations. Unlike many lead generation agencies that often generate unqualified leads, Pipeful kept their promises, delivering high-quality leads. Additionally, the collaboration provided valuable insights into our target market and options for positioning our brand.Pipeful has played a crucial role in broadening our client base in the US. Before partnering with them, we had a substantial number of loyal customers in the EMEA region. However, we were eager to extend our market reach and establish long-term relationships with clients in North America. Over the past year of collaboration with Pipeful, the experience has been nothing short of amazing. Our pipeline has seen unprecedented growth during this period.Currently, there's nothing to note that we dislike. The team is highly responsive and consistently delivers exceptional performance.Prior to this, I had the opportunity to collaborate with other lead generation agencies. Despite their grand promises, they, unfortunately, fell short of delivering the desired results. However, working with Pipeful was a completely different experience. Their extensive sales experience and realistic assessment of the situation influenced the strategies they employed to attract potential clients. In the first month of our collaboration, numerous appointments were booked on our calendar. Now, we are contemplating continuing our partnership. Therefore, I wholeheartedly recommend working with them.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • No SDR Headaches, No Stress

    LevelUp Leads specializes in optimizing sales processes by overseeing every aspect of clients' outbound strategies, from acquiring relevant data to executing meticulously crafted campaigns. With a dedicated team managing outreach efforts, clients can confidently devote their time to closing deals and driving...

    Top Services:

    • Email Marketing
    • Digital Strategy
    • Social Media Marketing
    • Direct Marketing
    • Call Centers
    • Show more
    Location
    Lafayette, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $49/hr
    Minimal Budget
    $1,000 - $10,000

    LevelUp Leads Services

    • Email Marketing
    • Digital Strategy
    • Social Media Marketing
    • Direct Marketing
    • Call Centers
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Okendo
    • ecotrak
    • Navigator
    Data sourced from the agency's DesignRush profile

    LevelUp Leads Reviews & Testimonials

    • Atif Gagguturu
      Atif Gagguturu Marketing & Customer Acquisition at BankStride/FileStride
      5.0★

      Email Marketing Review from Atif Gagguturu

      We are a document collection specializing in loan document gathering and invoice management software company. We hired LevelUp Leads to increase the amount of sales and demos we got.So we have been having trouble getting leads. As such we were searching for a marketing company to help us find more customers. We stumbled upon LevelUp Leads and found they came with a lot of good recommendations. It is benefiting us by giving us a better direction to get more leads. I like the weekly reviews where we can see what we are doing good. I also like being given reports of who is being responsive to our campaigns. I like how the LevelUp Leads explains what exactly the campaigns are doing and why they are doing the things they are doing and how it can get us out there. I especially like the recommendations given to our company for our other advertising projects.

    • Troy Deason
      Troy Deason Managing Director at HCA Healthcare
      5.0★

      Digital Strategy Review from Troy Deason

      Levelup Leads provides various digital marketing services for our healthcare testing services company. The team's tasks range from paid media and reporting to email campaign optimization and landing page creation. We are pleased with Levelup Leads' services. What's been most impressive about the team is their project management skills, they execute tasks efficiently and hold weekly meetings to ensure everyone's in synchronization. Their problem-solving capabilities are commendable as well.

    • Jesse W
      Jesse W Review from Google
      5.0★

      Jesse W's Review Sourced from Google

      John and his team at LevelUp Leads were highly proficient at setting quality appointments. Their personalized approach and expertise drives growth and produces meaningful results. I'm very pleased I went with them and would be more than happy to work with LevelUp Leads again in the future.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Trusted Advisors, VARs, Managed IT & Technology Broker Services.

    Internet Nerdz stands as a premier technology services and consulting firm, dedicated to crafting innovative solutions tailored to meet the intricate demands of your digital transformation journey. With a steadfast commitment to excellence, we specialize in developing cutting-edge strategies and solutions...

    Top Services:

    • IT Services
    • Managed Services
    • Cloud Consulting
    • Cybersecurity
    • IT Compliance Solution
    • Show more
    Location
    Santa Monica, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $200/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    1 Project Listed

    Internet Nerdz Services

    • IT Services
    • Managed Services
    • Cloud Consulting
    • Cybersecurity
    • IT Compliance Solution
    • Business Consulting
    • Call Centers
    • Phone Answering Services
    • IoT
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Clearspan Communications
    • Cynergy HiTech
    • Innisfree Hotels
    • Tandy Leather
    • Higgenbotham Insurance Agency
    • Northland Development
    • Prominence Hospitality
    • Fora Financial
    • Entouch Controls
    • Nexxiot Inc.
    Data sourced from the agency's DesignRush profile

    Internet Nerdz Reviews & Testimonials

    • Scott Berg
      Scott Berg VP of Operations at Sigma Funding Group
      5.0★

      IT Services Review from Scott Berg

      If you're looking for a company to handle your IT and telephony needs then Scott and his team at Internet Nerdz is who you should be working with. They have my highest recommendation!

    • Shaun Green
      Shaun Green Review from Google
      5.0★

      Shaun Green's Review Sourced from Google

      Internet Nerdz has been a game-changer for my business. Their team is responsive, knowledgeable, and genuinely committed to helping their clients succeed. They made everything simple and stress-free, from setup to ongoing support. Highly recommend for anyone looking for reliable and expert service!

    • Angelica Cervantes
      Angelica Cervantes Review from Google
      5.0★

      Angelica Cervantes's Review Sourced from Google

      In an increasingly digital world, partnering with Internet Nerdz Inc is a strategic move towards achieving your business goals. With their unparalleled expertise, dedication to excellence, and commitment to customer satisfaction, they are truly the gateway to digital success. Whether you're a startup, a small business, or a multinational corporation, Internet Nerdz Inc has the tools and the talent to propel your brand to new heights.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Able Customer Success Managers Ready to Work

    Trained specialists for delivering positive customer experience allowing you to remain on top of your customers' minds. Outsourced customer support, technical reporting, and back office virtual assistants trained solely to provide upper edge to your overall business...

    Top Services:

    • Call Centers
    • Digital Marketing
    • Customer Support
    Location
    Los Angeles, California
    Number of Employees
    500 - 999
    Average Hourly Rate
    $9/hr
    Minimal Budget
    $10,000 - $25,000

    Supportonic_CX Services

    • Call Centers
    • Digital Marketing
    • Customer Support
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Janitorial Leads Pro
    • All City Duct Cleaning
    • HVAC Leads Pro
    • MCA Leads Pro
    • Cleaning Leads Pro
    • Solar Leads Hub
    Data sourced from the agency's DesignRush profile
  • Global BPO Company

    Flatworld Solutions (FWS) is a global company offering IT, Data Science, Data Mining, business consulting, and outsourcing solutions since 2002...

    Top Services:

    • BPO
    • Call Centers
    • Transcription Services
    • Phone Answering Services
    • Show more
    Location
    Napa, California
    Number of Employees
    1000 & Up

    Flatworld Solutions Services

    • BPO
    • Call Centers
    • Transcription Services
    • Phone Answering Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Alcon
    • Rogers
    • Msn
    Data sourced from the agency's DesignRush profile
  • Reach your Marketing Milestones with Technology Contact Database

    We provide specialized Consultancy and Solutions for Businesses attempting to gain greater popularity in their niches...

    Top Services:

    • Market Research
    • Call Centers
    • Email Marketing
    • Digital Marketing
    • Show more
    Location
    Los Angeles, California
    Number of Employees
    500 - 999

    SPAN Services

    • Market Research
    • Call Centers
    • Email Marketing
    • Digital Marketing
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Fintech Industry
    • IT Industry
    • Healthcare Industry
    Data sourced from the agency's DesignRush profile
  • Sales Development, Sales Recruiting, and Sales Coaching Services

    Grow Your Sales Pipeline executes high-standard sales development, coaching, and recruiting programs to drive profitable revenue growth for our client partners...

    Top Services:

    • Direct Marketing
    • Business Consulting
    • Email Marketing
    • Call Centers
    • Advertising
    • Show more
    Location
    Roseville, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $150/hr

    Grow Your Sales Pipeline Services

    • Direct Marketing
    • Business Consulting
    • Email Marketing
    • Call Centers
    • Advertising
    • Customer Support
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • tap/QA, LLC
    • InterplX Expense Management
    • eDynamic Learning
    • mTab LLC
    • Lighthouse Software
    • Hoonuit, LLC
    • MakeMusic
    • Great Bay Software, Inc
    • Convey
    • OptiMine
    Data sourced from the agency's DesignRush profile
  • Scale Your Business With Quality Outsourced Teams In ‍Back Office Support.

    RPM stands out as a comprehensive solution provider, offering bilingual expertise in both English and Spanish, with the flexibility to provide full-time or part-time dedicated resources, fully managed to meet diverse operational needs. Our capabilities span a wide spectrum, encompassing intricate back-office...

    Top Services:

    • BPO
    • Customer Support
    • Call Centers
    • Staff Augmentation
    • Show more
    Location
    San Jose, California
    Number of Employees
    100 - 249
    Minimal Budget
    Under $1,000

    RPM Services

    • BPO
    • Customer Support
    • Call Centers
    • Staff Augmentation
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • CareerVault
    • Way
    • The Bright App
    Data sourced from the agency's DesignRush profile
  • Smart Billing Partner

    Nationwide medical billing & revenue cycle management for healthcare providers billing, coding, credentialing, and HIPAA-compliant claims support...

    Top Services:

    • Digital Services
    • AEO
    • SEO
    • PPC
    • Accounting
    • Show more
    Location
    Madera, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $25/hr
    Minimal Budget
    Under $1,000

    DOCS MEDICAL Billing Services

    • Digital Services
    • AEO
    • SEO
    • PPC
    • Accounting
    • Phone Answering Services
    • HR Outsourcing
    • Call Centers
    • CRM Consulting
    • Customer Support
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Your Precious Dream
    • Kimberly Riggi
    • Robertson Counselling
    Data sourced from the agency's DesignRush profile

    DOCS MEDICAL Billing Reviews & Testimonials

    • Kara Brock
      Kara Brock Review from Google
      5.0★

      Kara Brock's Review Sourced from Google

      Sam has been excellent for my podiatry practice. He responds quickly and follows through on any concerns. My reimbursement has gone up significantly since transitioning to Docs medical. They also provide credentialing services and have been very helpful

    • Hema Majeno
      Hema Majeno Review from Google
      5.0★

      Hema Majeno's Review Sourced from Google

      Docs Medical Billing has been helping my practice since I started last year. They get things done on time. They help my front and back staff to check eligibility, they help me set up.portals for insurances, and do their diligence on claims. They also help me find a web designer.I highly recommend them 👌

    • Catherine Abbaa
      Catherine Abbaa Review from Google
      5.0★

      Catherine Abbaa's Review Sourced from Google

      My experience with Peter and his team and the entire Docs Medical Billing LLC in handling my complex billing was very professional, reliable and smooth. The quality of their services far exceeded my expectations. The services was outstanding. I will continue to work with them and recommend them to anyone

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Influx

    VerifiedVerified by the DesignRush team for authenticity and credibility.

    Influx.com are the experts in on-brand 24/7 customer support, since 2013..

    Influx staffs dedicated call center teams for inbound, outbound, and after-hours coverage across the Americas, Europe, and APAC. Since 2013, the call center provider has served 750+ brands on month-to-month plans with no lock-in and a 7-day launch window...

    Top Services:

    • Customer Support
    • Call Centers
    • BPO
    • HR Outsourcing
    • AI Development
    • Show more
    Location
    West Hollywood, California
    Number of Employees
    1000 & Up
    Portfolios Count
    2 Projects Listed

    Influx Services

    • Customer Support
    • Call Centers
    • BPO
    • HR Outsourcing
    • AI Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Linktree
    • Meshki
    • Casely
    • BearPaw
    • Asana Rebel
    • Classpass
    • QSIC
    • Autopilot
    • Melinda Maria
    • Yazio
    Data sourced from the agency's DesignRush profile
  • Hugo

    VerifiedVerified by the DesignRush team for authenticity and credibility.

    World-Class Outsourced Teams Operating 24/7 Globally, in 60+ Languages

    Hugo deploys dedicated inbound and outbound call center teams across 60+ languages, with 24/7 coverage and 99.9% uptime. Its university-educated agents deliver 88% first call resolution. The call center provider is ISO 27001, HIPAA, and SOC 2 certified...

    Top Services:

    • Customer Support
    • Call Centers
    • BPO
    • Phone Answering Services
    • Transcription Services
    • Show more
    Location
    San Francisco, California
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $10/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    8 Projects Listed

    Hugo Services

    • Customer Support
    • Call Centers
    • BPO
    • Phone Answering Services
    • Transcription Services
    • Translation Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Google
    • Meta
    • Outschool
    • Topicals
    • Attentive
    • Faire
    • Sakara
    • Aurora
    Data sourced from the agency's DesignRush profile

    Hugo Reviews & Testimonials

    • Greg Digneo
      Greg Digneo founder at content guppy
      5.0★

      B2B Review from Greg Digneo

      Best decision we made last year was partnering with this CX team for our customer support, billing, and sales assistance. We were drowning in client emails and chasing invoices late at night instead of focusing on SEO strategy. Results have been incredible: client response times dropped from hours to under an hour, payment collection improved 60%, landing page conversions up 28%, and client retention increased 35%. They integrated seamlessly with our systems and scaled with us as we grew. Now we have more time to focus on delivering SEO results instead of being stuck in support tickets all day. If you're an agency juggling client support with campaign management, this team is a game-changer.

    • Nimmit Shah
      Nimmit Shah Owner at Pi Asset Management Ltd
      5.0★

      BPO Review from Nimmit Shah

      Collaborating with Hugo elevated our property management firm's performance. Their support solutions slashed response times by 40% and boosted tenant satisfaction by 30%. Hugo's seamless integration proved instrumental in propelling our business forward, setting new benchmarks in operational excellence.

    • Jambu Subramanian
      Jambu Subramanian Senior Manager of Operations at Kasha Global
      5.0★

      Customer Support Review from Jambu Subramanian

      Their team quickly integrated into our workflow, demonstrating a deep understanding of our business needs. We were impressed by their professionalism and the ease with which they handled complex customer inquiries. Hugo's technical support team showed exceptional problem-solving skills, significantly reducing resolution times for order issues.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews

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