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 × Transportation & Logistics ×Clear Filters
  • Grow Your Sales Pipeline With Human + AI

    Founded in 2004 and headquartered in Encino, California, Callbox Inc. is a global leader in outsourced B2B lead generation, appointment setting, and event marketing. With over 20 years of experience and a multilingual team servicing APAC, LATAM, and EMEA, the agency supports medium-sized businesses to...

    Top Services:

    • Managed Services
    • Cloud Consulting
    • Digital Marketing
    • ERP Consulting
    • CRM Consulting
    • Show more
    Location
    Los Angeles, California
    Number of Employees
    500 - 999
    Portfolios Count
    100 Projects Listed

    Callbox Services

    • Managed Services
    • Cloud Consulting
    • Digital Marketing
    • ERP Consulting
    • CRM Consulting
    • BPO
    • Event Marketing
    • SEO
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Amazon
    • Google
    • Microsoft
    • Workday
    • SAP
    • Telefonica
    • Zendesk
    • opentext
    • Yandex
    • NEC
    Data sourced from the agency's DesignRush profile

    Callbox Reviews & Testimonials

    • Joachim Fong
      Joachim Fong Regional Marketing Specialist at Malvern Panalytical
      5.0★

      Lead Generation Review from Joachim Fong

      For the past year, Callbox has provided us with satisfactory lead generating and lead nurturing services. They were instrumental in securing attendees for our events, scheduling client appointments and facilitating the sale of one of our benchtop systems. Their professionalism in conveying our product attributes and valued solutions to prospective customers has brought us results.

    • Jonathan Anderson
      Jonathan Anderson Owner at ABS
      5.0★

      Lead Generation Review from Jonathan Anderson

      I’ve used Callbox now for about four months for my internet marketing company. The first two months they did not pay off. However with some additional training on my part, they started to close a higher percentage of my target audience. They’re really smart, nice and are really working hard to keep my business. My dedicated team keeps me up-to-date through frequent communications. My R.O.I is getting stronger and my CPA is starting to drop.

    • Ted Calvin
      Ted Calvin Co-Founder & Vice President at Charted Energy
      5.0★

      Appointment Setting Review from Ted Calvin

      Charted Energy has enjoyed a productive relationship with Callbox. They have done a great job of helping us target prospects within the markets we serve as well as qualify leads and set up appointments with decision-makers. Callbox has generally exceeded the number of leads per week we expected and provides a good value by enabling our inside sales team.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Your On-Demand Sales Team

    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:

    • Email Marketing
    • Digital Marketing
    • Social Media Marketing
    • BPO
    • Digital Strategy
    • Show more
    Location
    San Francisco, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $45/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    5 Projects Listed

    Martal Group Services

    • Email Marketing
    • Digital Marketing
    • Social Media Marketing
    • BPO
    • Digital Strategy
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Clickworker.com
    • Incentives-Solutions.com
    • Semasio.com
    • Kipod.com
    • Favendo.com
    • Weezmo.com
    • Intech-Global.com
    • NemoNano.com
    • Indoorgo.com
    • Vidmind.com
    Data sourced from the agency's DesignRush profile

    Martal Group Reviews & Testimonials

    • Nidhi Jaiswal
      Nidhi Jaiswal Marketing Executive at Social Frontier
      5.0★

      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.

    • Anas Aftab
      Anas Aftab Outreach Manager at Get Pro Links
      5.0★

      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.

    • Doug McLean
      Doug McLean VP of Global Sales and Channels at Complete EDI
      5.0★

      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.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • 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
  • Best Option For Nearshore Call Center Services

    We provide fully turnkey solutions handling legal setup, HR, payroll, accounting, compliance, facilities, and day-to-day supervision so our clients can focus exclusively on sales, growth, and performance. Write everything around this idea , this is the core service we offer...

    Top Services:

    • BPO
    • Call Centers
    • HR Outsourcing
    • Phone Answering Services
    • Customer Support
    • Show more
    Location
    Chula Vista, California
    Number of Employees
    100 - 249
    Average Hourly Rate
    $15/hr

    PromoCall Services

    • BPO
    • Call Centers
    • HR Outsourcing
    • Phone Answering Services
    • Customer Support
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Contempo Counseling
    • Lenditup
    • Protect Environmental
    Data sourced from the agency's DesignRush profile
  • Consulting That Multiplies Your Success

    WGS2D is a boutique business and technology consulting firm built by experienced leaders from top-tier firms. We're known for moving fast, delivering real outcomes, and putting the client first always. What sets us apart is how we execute. We don't just advise; we own results. Our Say/Do ratio is 100%. if we...

    Top Services:

    • Managed Services
    • Cloud Consulting
    • IT Services
    • DevOps Consulting
    • Cybersecurity
    • Show more
    Location
    Oakland, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    1 Project Listed

    WGS2D Consulting Services

    • Managed Services
    • Cloud Consulting
    • IT Services
    • DevOps Consulting
    • Cybersecurity
    • Business Consulting
    • BPO
    • AI Development
    • Software Development
    • Mobile App Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Software & IT Services Industry
    • Professional Services Industry
    • Finance Industry
    Data sourced from the agency's DesignRush profile
  • Streamlining Your Operational Challenges

    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:

    • Phone Answering Services
    • BPO
    Location
    Pasadena, California
    Number of Employees
    Under 49

    GlobalityNet Services

    • Phone Answering Services
    • BPO
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Telecommunications Industry
    • Finance Industry
    • Corporate Services Industry
    Data sourced from the agency's DesignRush profile

    GlobalityNet Reviews & Testimonials

    • Joann Mak
      Joann Mak Review from Google
      5.0★

      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
      Loc H Review from Google
      5.0★

      Loc H's Review Sourced from Google

      GlobalityNet helped us achieve our targets. They are very hands-on and are easy to work with.

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

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