Top B2B Sales Outsourcing Companies

Home
Call Center Companies
B2B Sales Outsourcing Companies

107 Companies-Rankings updated: August 20, 2026

DesignRush vets all agencies based on professional qualifications and verified customer feedback to help you choose confidently. Some featured agencies maintain paid sponsorships.

Show Filters

United States ×

Callbox
Grow Your Sales Pipeline With Human + AI
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
View Profile
4.8 4.8 (5)
4.1 4.1 (48)
Scalemill
Lead Generation For B2B SAAS Companies
Lead Generation For B2B SAAS Companies
Scalemill runs human-first, AI-enabled SDR teams for B2B SaaS companies, handling appointment setting, outbound lead generation, customer support, customer success, and sales operations across 20+ countries...
Top Services:
Customer Support
Location
Sheridan, Wyoming
Number of Employees
100 - 249
View Profile
4.8 4.8 (5)
Appointment Setter Online
We Book the Meetings, You Close the Deal.
We Book the Meetings, You Close the Deal.
Appointment Setter Online delivers outsourced appointment setting and lead generation through dedicated SDRs assigned by client fit, covering outbound prospecting, inbound qualification, telemarketing, and customer support. To date, the call center provider reports 75,000+ verified sales bookings...
Top Services:
BPO
Phone Answering Services
Customer Support
Digital Marketing
Social Media Marketing
Show more
Location
Albany, New York
Number of Employees
500 - 999
Average Hourly Rate
$5/hr
Portfolios Count
8 Projects Listed
View Profile
4.8 4.8 (5)
Tech2globe
Your Partner in AI-Enabled Development, Marketing, eCommerce, Data Management, BI and Ops.
Your Partner in AI-Enabled Development, Marketing, eCommerce, Data Management, BI and Ops.
Tech2Globe provides inbound and outbound call center services as part of its BPO-KPO division, covering customer support, telemarketing, lead generation, virtual assistance, and call center monitoring. With 14+ years of operation and 12,000+ completed projects, it holds a 4.9 rating on DesignRush...
Top Services:
Digital Marketing
Web Development
eCommerce Development
Web Design
Social Media Marketing
Show more
Location
New York City, New York
Number of Employees
250 - 499
Average Hourly Rate
$25/hr
Minimal Budget
$1,000 - $10,000
Portfolios Count
16 Projects Listed
View Profile
4.9 4.9 (21)
Belkins
Close more deals with ROI-focused lead acquisition
Close more deals with ROI-focused lead acquisition
Belkins runs outbound lead generation for B2B companies across 50+ industries, using cold calling, email, and LinkedIn to book 100 to 400 qualified appointments per year per client. Founded in 2017, the call center company has received multiple Stevie Awards...
Top Services:
Email Marketing
BPO
CRM Consulting
Business Consulting
Direct Marketing
Show more
Location
Dover, Delaware
Number of Employees
250 - 499
Average Hourly Rate
$50/hr
Minimal Budget
$1,000 - $10,000
Portfolios Count
18 Projects Listed
View Profile
4.9 4.9 (16)
4.3 4.3 (7)
SupportYourApp
AI-Powered Support-as-a-Service Company Focused on the Tech Industry
AI-Powered Support-as-a-Service Company Focused on the Tech Industry
SupportYourApp runs outsourced call center, technical support, live chat, and help desk operations for 250+ companies including Mastercard, Calm, and MacPaw. Since 2010 the agency has expanded to 30+ countries and 60+ languages, deploying AI Voice Agents and chatbots alongside human teams...
Top Services:
Customer Support
Call Centers
BPO
Phone Answering Services
Staff Augmentation
Show more
Location
Wilmington, Delaware
Number of Employees
1000 & Up
Minimal Budget
$1,000 - $10,000
Portfolios Count
17 Projects Listed
View Profile
4.9 4.9 (9)
5.0 5.0 (1)
Pipeful
Qualified Leads In Your Pipeline
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
View Profile
5.0 5.0 (41)

Callbox

Grow Your Sales Pipeline With Human + AI

Scalemill

Lead Generation For B2B SAAS Companies

Appointment Setter Online

We Book the Meetings, You Close the Deal.

Tech2globe

Your Partner in AI-Enabled Development, Marketing, eCommerce, Data Management, BI and Ops.

Belkins

Close more deals with ROI-focused lead acquisition

SupportYourApp

AI-Powered Support-as-a-Service Company Focused on the Tech Industry

Pipeful

Qualified Leads In Your Pipeline

Related Call Centers Specializations in the US

Popular Services