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.
Best California Call Center Service Providers Rankings
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 × Finance × $1,000 - $10,000 ×Clear Filters
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 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 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 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
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 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 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 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
CIENCE Technologies is a B2B Lead Generation and Sales Acceleration Company...
Top Services:
Email Marketing
Digital Marketing
Call Centers
Location
San Francisco, California
Number of Employees
1000 & Up
Average Hourly Rate
$25/hr
Minimal Budget
$1,000 - $10,000
CIENCE Technologies Services
Email Marketing
Digital Marketing
Call Centers
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Microsoft
SAP
FIVESTARS
Travel Tripper
Raise
Segmint
Second Genome
Classy
Data sourced from the agency's DesignRush profile
CIENCE Technologies Reviews & Testimonials
Josh Kaye Founder at Bake Me A Wish
1.0★
Lead Generation Review from Josh Kaye
Complete Scam.Hired them for lead generation.Delivered bogus made up leads.Beat us for 10,000$.Zero return.Avoid at all costs.
Josh Kaye Founder at Bake Me A Wish
1.0★
Email Marketing Review from Josh Kaye
I recently engaged Cience Lead Generation, paying $10,000 for 250 qualified leads, expecting a professional service and solid prospects. Unfortunately, what I received was far from that. The leads they presented were completely fabricatednone of the individuals or businesses had requested information about my company. In fact, we obtained sworn affidavits from many of these so-called "leads" affirming they had never heard of us or requested any information.This is a blatant scam, and we're now in the process of pursuing legal action against Cience to recover our full payment. If you are considering working with them for lead generation, I strongly urge you to reconsider. Their practices are fraudulent, and you risk losing a significant amount of money without getting anything of value in return. We were misled, and now we're facing the consequences of trusting this company. Dont make the same mistake.
Joel Mantecon seo at Hirebook
4.0★
Financial Review from Joel Mantecon
I have worked with with the CIENCE team for over two years already. They provided my company with a team of SDRs that helped us with our lead generation efforts. Overall, we feel satisfied with our investment, as we have seen an increase in sales and organization.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
WC Call Center excels in business-to-business (B2B) appointment setting and telemarketing, focusing on generating high-quality appointments with C-level executives. Its experienced professionals ensure each appointment meets rigorous qualification standards and drives new sales opportunities. The firm acts as...
Top Services:
Call Centers
BPO
Location
Modesto, California
Number of Employees
Under 49
Average Hourly Rate
$25/hr
Minimal Budget
$1,000 - $10,000
WC Call Center Services
Call Centers
BPO
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts