Best Call Center Services Agencies

#1

DMT Business Development

★5.0

Ottawa, Canada · Team 51-200 · 3 services · 45 reviews

DMT Business Development is a Canadian lead-generation and appointment-setting agency with a core focus on outbound. We Do More Than biz-dev covering all aspects of outbound and inbound sales, and go far beyond. Our services include: Appointment Setting Cold Calling Lead Generation Data Research Email Marketing LinkedIn Growth Multichannel Outreach Hyper-personalized Outreach Recruiting Sourcing Inbound Whether you need an effective dedicated team to drive new customers for your business or a well-performing appointment-setting funnel - we got you covered. Our services vary from building a sales team from scratch, providing cold calling services, and going to generating contact and data lists. Our dedicated SDR team handles all the pre-sales activities for you, so you can focus on closing deals. Our main priority is to ensure your project follows the latest tech trends and AI tools - all along with our in-house built software and AI tools. With the fastest onboarding & strategy implementation on the market, short ramp-up period, hand-curated approach to lead generation, and highly segmented multichannel & personalized outreach - we're able to bring appointments even for the most competitive industries. Over the past 7 years, we developed result-driven tactics for some of our core industries like: SaaS (Productive.io, Yodeck) Software/Web Development (Virtido, Digital Scientists) Recruitment (Cielo, LeFort Talent Group) Life Sciences (Biovision Diagnostics, InVivo Biosciences) IT services (CDS Global Cloud) Service Providers (Top Drawer Merch, Derm for Primary Care) Those are just a few to mention. We also work with e-learning, e-commerce, construction, healthcare, creative, physical products, and other companies. Making sure our strategy aligns with your niche, industry focus, and demand. Whether you run a startup that is trying to leverage growth or an established company expanding to new markets, we help you connect with your Ideal Customer Profile.  Read more

#2

Top Virtual Assistant

★5.0

Philadelphia, United States · Team 51-200 · 4 services · 35 reviews

At Top Virtual Assistants, we take the busy work off your plate—so you can stay focused on what really matters: leading, scaling, and growing your business. From calendar management and email handling to research, admin support, and more, our expert virtual assistants ensure your day runs smoothly and efficiently. For years, top entrepreneurs, startups, and executives have trusted TVA to deliver dependable, discreet, and detail-oriented support. We don’t just complete tasks—we become an extension of your team. Skilled professionals, fully vetted and trained Seamless integration into your workflow Flexible support that scales with you Proven results across multiple industries Reclaim Your Time. Reinvest in Growth. When your time is freed from admin chaos, you can think bigger, move faster, and lead with clarity. Partner with the best in the business. Let Top Virtual Assistants keep your operations on track while you drive your vision forward.Read more

#3

Leadium

★5.0

Las Vegas, United States · Team 51-200 · 4 services · 28 reviews

Leadium is an award-winning B2B lead generation agency that delivers what others only promise. Hit your revenue goals every quarter. There is no better way to go to market or grow your business. Leadium is revolutionizing the Sales Development industry with a new approach, focusing on using analytical outbound campaigns to deliver revenue pipeline at a lower cost than traditional Sales Development Teams. By understanding prospects' cognitive behavior and personality insights, Leadium can personalize outbound efforts for maximum results. We become a revenue partner. Our singular goal is to deliver a strategic and repeatable lead pipeline with a measurable return on investment (ROI). Since 2015, Leadium has proven that top-of-funnel sales can be scaled through an agency model. We've helped drive revenue at high-growth teams by creating over $1 billion in revenue pipeline across 1200 organizations, playing a part in 76 acquisitions and seeing clients receive $6.5+ billion in funding and 5 IPOs.  Our Services Include: 1) Outbound Appointment Setting 2) Inbound Lead Management 3) Channel-Optimized Lead Research 4) Omni-Channel Sales Strategy 5) Top-of-Funnel Consultation 6) Deliverability & Technology Implementation Leadium continues to be rated as one of the world’s top-performing sales development agencies by Clutch, GoodFirms, Inc. 5000. We look forward to becoming your revenue partner!Read more

#4

LevelUp Leads

★5.0

Laguna Beach, United States · Team 51-200 · 3 services · 33 reviews

Start filling your pipeline now! LevelUp Leads is a B2B Sales Development and Appointment Setting Agency.  We act as an extended part of your team and offer Fractional and Full Service SDRs backed by our team and tech stack to run outbound Email, LinkedIn, Cold Call, and SEO campaigns to schedule meetings for you. Our team leads your outbound strategy, sourcing relevant data, implementing our tech stack, copywriting, and managing your campaigns to create pipeline and revenue. This means your team is kept busy closing more deals.Read more

#5

Paragon Sales Solutions

★4.9

Countesthorpe, United Kingdom · Team 11-50 · 6 services · 34 reviews

We are a UK based sales, telemarketing and marketing agency that works hard to generate results. Whether you are looking for more bookings, enquiries, leads or sales; we work hard to ensure you see a return on your investment with us! We have an array of services that are all designed to help you to see an increase in sales, which include: - Telemarketing - Lead Generation - Appointment Setting - Social Media Marketing - Paid Advertising - SEO - Web Design - Content Creation / Content Marketing - Sales TrainingAnd much more!Better still, we work with an array of clients ranging from a whole host of sectors and industries, and different sizes too. If you are wanting to see your sales pipeline fill up, and you want to see an increase in your business growth, then be sure to get in touch for a free consultation. Paragon Sales Solutions We exist to build the business of our clientsRead more

#6

Martal Group

★4.9

Oakville, Canada · Team 201-500 · 4 services · 31 reviews

Since 2009, Martal Group has helped B2B organizations grow their revenue through proven outbound strategies that accelerate sales cycles by 25%. From scaling startups to Fortune 500 companies, our system has driven results for over 2,000 B2B brands across 50+ industries worldwide.  Our Outbound System Martal’s outbound system is built to support complex B2B sales. Our approach combines experienced sales teams with our proprietary AI SDR platform, creating a system that adapts in real time to buyer behavior, intent signals, and performance data.  We design micro-segmented campaigns, personalize messaging at scale, and coordinate outreach across email, LinkedIn, and phone. Most campaigns begin producing qualified leads within 30 days. What Sets Us Apart Martal operates with experienced, onshore sales teams across North America, the EU, and LATAM. Rather than replacing internal teams, we work as a seamless extension of our clients’ sales organizations, supporting everything from early-stage pipeline development to enterprise-level account-based strategies. Services B2B Lead Generation Appointment Setting Sales Outsourcing Account-Based Marketing (ABM) Cold Email, Cold Calling, and LinkedIn Outreach An Agency B2B Companies Trust Martal has been recognized across multiple platforms for performance and client satisfaction. #1 Lead Generation Company on Clutch #8 on Clutch’s Top 1000 Providers List for 2025 Top Lead Generation Company on G2 One of Canada’s Top Growing Companies by The Globe and Mail Top 500 BPO on Outsource Accelerator for 2025 Read more

#7

SalesRoads

★4.9

Boca Raton, United States · Team 51-200 · 3 services · 10 reviews

SalesRoads is an award-winning B2B sales outsourcing firm providing appointment setting and lead generation services. We empower businesses of all sizes to reach their goals by providing targeted leads, a predictable pipeline, and stronger revenue. 👉 INDUSTRY FOCUS: 🔸SaaS & Tech 🔸Manufacturing Tech 🔸Industrial Tech 🔸Logistics 🔸Construction 🔸Transportation 🔸SLED Market 👉 OUR METHODOLOGY: We don't have a single outreach approach. We use front-line data to find an approach that drives sustainable results for your business. 🔷Discover A comprehensive understanding of your business, goals, marketplace, and challenges empowers us to find an approach that works for your business. 🔷Strategize We don't have a template for building your sales program. We have 15+ years of experience in forming the strategy for your campaign. 🔷Test We believe in results-measured testing. We send our initial strategy live and listen for important feedback from our SDRs and campaign metrics. 🔷Accelerate We accelerate your campaign strategy as we iterate with new approaches informed by our initial outreach and results. 👉 OUR RESULTS: 🔸17+ Years in Business 🔸500+ Happy Customers 🔸Over 100,000 Appointments Set 🔸The Best SDRs 🔸The Leader in the Industry 🔸Clutch Global Top 1000 Companies 2021 Say 'No' to zero-data campaigns, spammy practices, and anonymous SDRs. Scale your company faster and skip the prospecting process with SalesRoads. 🚀 👉 FIND US: Reviews➡️ https://salesroads.com/reviews/ Case Studies➡️ https://salesroads.com/client-success/#case-studies LinkedIn➡️ https://www.linkedin.com/company/salesroads/ YouTube➡️https://www.youtube.com/channel/UCqYUYuN7cS0C-vV9UJyfROg    Read more

#8

Insil

★5.0

North Sydney, Australia · Team 11-50 · 5 services · 3 reviews

We started Insil with a vision to drastically improve the Marketing and sales landscape. Throughout the early lifetime of the company we discovered that several of our clients were being served in 1 way or another, but not all together. The disconnect between different service providers left the customer receiving a less optimal result and this is the gap that we fill.  Our core focus has always been to serve our customers. Through our holistic customer-centric approach we analyse, and developing marketing & sales outputs that closely align with our customers objectives, taking into account all of their internal & external actives. Insil is recognised as a boutique Australian marketing agency. We offer the agility and dedication of an independent agency with the backing of considerable resources, technology and expertise, both in Australia and internationally, bringing our collective experience with some of the world’s biggest brands to every brief or challenge.Read more

#9

SalesAR

★4.8

London, United Kingdom · Team 51-200 · 4 services · 41 reviews

With 5+ years of experience, SalesAR goes beyond lead generation — we streamline your sales funnel, optimize processes, and enhance team efficiency. Built on trust, transparency, and fast, measurable results, we ensure your success. What you get: ✅ A customized strategy tailored to your niche and goals✅ Clear processes with predictable outcomes✅ 500+ successful projects across 97+ industries✅ Fast implementation and results within weeks✅ Exclusive access to a knowledge hub and expert community We specialize in small and mid-sized businesses, delivering speed and quality where it matters most. SalesAR isn’t just a service — it’s a strategic partner in your growth. 📩 Let’s talk — your solution starts with a conversation.Read more

#10

Purple Sales

★4.8

Toronto, Canada · Team 11-50 · 6 services · 16 reviews

Purple Sales: B2B Outsourced Sales and Marketing Lead Gen Partner  As a Gold HubSpot Partner and a “One-Stop Shop" for your sales and marketing needs, we help B2B companies generate more sales qualified leads and sales opportunities with: B2B Outbound program services : SDR/BDR outsourcing, cold calling, personalized email outreach, mass email sequences, LinkedIn prospecting, event prospecting, brand awareness, displacement campaigns and more.  B2B Inbound program services: SEO and AIO (AEO, and GEO), blogs, social media content, website design, website development, newsletters, and social and google ads (PPC, display, LinkedIn, Instagram ect) and more.  B2B Brand Strategy services: website creation, re-branding, aquisition re-branding, landing pages, sales enablement materials, marketing materials, brand guidelines, logos, sales deck, pitch deck, event materials, business cards and more  Custom HubSpot Marketing Hub and Sales Hub implementation or migration - ongoing CRM & CMS optimization B2B Market Expansion and Go-to-Market Validation campaigns B2B Sales Outsourcing  From your first campaign to full revenue operations, we make sales and marketing work together in parallel drive measurable growth. Explore what smarter B2B growth looks like - complete the "Contact Us" form on our website to schedule with an appointment with a Purple Sales expert and learn more about how we can help.Read more

#11

EBQ

★4.8

Austin, United States · Team 201-500 · 5 services · 27 reviews

EBQ provides services to help your business scale through every stage of the sales cycle: CRM Consulting, Data, Marketing, Appointment Setting, Sales, and Customer Experience. We have teams that are dedicated to each phase of the buyer’s journey, which can be sourced to fill gaps or increase the velocity of your sales efforts. Each team is trained on best practices and fully managed on your behalf to provide pipeline creation and revenue growth.

#12

Cleverly

★4.7

Los Angeles, United States · Team 11-50 · 4 services · 30 reviews

Cleverly's expertise for B2B companies: LinkedIn Advertising LinkedIn Lead Generation Cold Email Outreach White-label Lead Generation LinkedIn Recruiting Google Ads Management Over 1,000+ five-star client reviews on Trustpilot & Clutch.

#13

Based in Kolkata, Task Virtual provides comprehensive digital marketing and web development services alongside sales outsourcing and call center operations. With a team of 51-200 professionals, they deliver SEO, content marketing, social media management, graphic design, and web solutions to clients worldwide.

#14

LEVIEV'S

★5.0

Tel Aviv-Yafo, Israel · Team 11-50 · 5 services · 6 reviews

Based in Tel Aviv-Yafo, Leviev's offers custom software development, web development, and AI solutions alongside PPC management and call center services. With a team of 11-50 professionals, the agency delivers tailored digital services backed by strong client feedback.

#15

Booth

★5.0

Makati, Philippines · Team 500+ · 6 services · 2 reviews

At The Booth, we specialize in strategic animation crafted not just to look great but to move audiences and drive real results. Whether you need to explain a complex idea, enhance brand storytelling, or engage your customers on a deeper level, we bring a thoughtful, creative approach to every project. We work with marketing teams, agencies, and global brands to transform concepts into dynamic, high-impact animations that go beyond just visuals. Our process is built on strategy, ensuring every frame serves a purpose, whether it’s simplifying a technical message, building brand awareness, or driving conversions. We don’t just make videos; we create experiences that resonate, clarify, and inspire action. Our Core Services Include: Explainer Videos – Distilling complex ideas into engaging, easy-to-understand animations. Corporate & B2B Animation – Helping brands communicate with clarity and authority. Product & SaaS Videos – Showcasing features and benefits in a compelling way. Motion Branding & UI Animation – Bringing digital products and brand identities to life. Marketing & Social Media Animation – Driving engagement with content designed for impact. Why Work With Us?Our team understands that animation isn’t just about aesthetics it’s a powerful tool for persuasion, education, and storytelling. We take a collaborative approach, working closely with our clients to align our animations with their goals, brand, and audience needs. From script development to final animation, we ensure every project is tailored for maximum clarity, engagement, and effectiveness. Because the best stories move. And when done right, they move people, conversations, and results. Let’s put your story in motion.  Read more

#16

Based in New Delhi, SunTec India provides comprehensive digital marketing and software development services to businesses globally. With a team of 500+ professionals, the agency specializes in custom solutions ranging from web and mobile development to AI, performance marketing, and sales outsourcing.

#17

OBI Services

Dipolog City, Philippines · Team 51-200 · 3 services

Based in Dipolog City, Philippines, OBI Services provides sales outsourcing, call center services, and content marketing to businesses seeking reliable support. With a team of 51-200 professionals, they maintain a consistent 5.0-star rating across 20 client reviews.