Browse Lead Gen Agencies
Callbox

Callbox

Review
★9.4/10
🇺🇸 Encino, California·250 - 999 employees·Est. 2004·Reviewed Mar 2026

The largest provider of outsourced B2B marketing and sales support

Visit Website
Best For
Global B2B companies needing multi-channel, multilingual lead generation
Hourly Rate
$25-49/hr
50% below the $75/hr median for lead gen agencies in United States
Min. Project
$1,000+
Industries
Software, SaaS, Cybersecurity
Callbox

Clients

GoogleAWSSAPMicrosoftLinkedInIntelHPDHL

About Callbox

Global B2B lead generation company founded in 2004, delivering 1.3M+ qualified leads across 20,000+ campaigns. Combines AI-powered tools with human expertise for multi-channel outreach including phone, email, LinkedIn, chat, and events across 15+ languages.

Who Callbox Is Best For

Global B2B companies needing multi-channel, multilingual lead generation.

Why Choose Callbox

20+ years experience
1.3M+ leads delivered
15+ languages
Global coverage

Callbox Services

Lead GenerationAppointment SettingAccount-Based MarketingEvent MarketingWebinar MarketingDatabase Services

Selected Work

Callbox Generates Quality Leads for a Denver Security PaaS Firm

Security PaaS firm (Denver)

The Client is a Denver-based security Platform-as-a-Service provider offering cloud-native threat monitoring and compliance tools. It serves mid-market and enterprise organisations across North America.

View case study

ABM Lead Generation: Generate Quality SQLs for Colombian Telehealth Firm

Telehealth firm (Bogotá)

The Client is a telehealth startup headquartered in Bogotá, Colombia, operating a chat-first and video telemedicine platform. It connects patients with specialist doctors across Latin America via mobile, offering digital consultations, prescriptions, and corporate wellness integration.

View case study

Global Semiconductor Leader Secures Registrants for a Major Manufacturing Event

Semiconductor manufacturer

A global semiconductor and embedded processing solutions provider serving the automotive, industrial, and connected industries, operating in over 30 countries.

View case study

Reviews from Google

★4.1/5 (48)
★ 1/5· 6 months ago

Spam. Had a couple calls with them and then informed them our company would not be interested, but i receive constant emails from Vincent with a copy/paste email. This isn't professional and comes across as spam. Take a hint.

★ 3/5· 7 months ago

Had two Exploratory Meetings scheduled with a Callbox representative, but they were no-shows (Jan 21 and Feb 3). I waited in the Zoom meeting room, but nobody showed up to let me in. Their service might be fine, too bad I never had the opportunity to even speak with somebody!

Reviews sourced from Google

See all 48 reviews on Google

Photos

Callbox photo 1
Callbox photo 2
Callbox photo 3
Callbox photo 4

Alternatives to Callbox

Lead Gen Agencies with a similar market, price band, and focus.