Outsourced Inside Sales Services
Supercharge Your B2B Sales Pipeline to Drive Results
We provide outsourced inside sales teams, but it doesn’t stop there. With a mix of cutting-edge technology, data-driven strategies, and AI-powered insights, we ensure your pipeline stays full and your meetings stay qualified.
Trusted by global enterprise leaders
Overcome Sales Gaps That Slow Pipeline Growth
Scaling inside sales is difficult without the right systems, data, and people. Callbox solves common inside sales outsourcing challenges by providing structured outreach, lead qualification, and consistent follow-up that keeps deals moving.
Limited Sales Coverage
Low Lead Quality
Slow Sales Cycles
Disconnected Sales and Marketing
Why Choose Callbox for Outsourced Inside Sales
Proven B2B Inside Sales Expertise
With 20+ years of experience in B2B sales, we know how to drive qualified leads and sales-ready appointments that accelerate growth.
Talk to SalesDedicated Outsource Inside Sales Team
Our team integrates with your ICP, messaging, and goals to deliver personalized sales outreach that seamlessly supports your internal processes.
Talk to SalesMulti-Channel Sales Engagement
We use a multi-channel approach—email, phone, LinkedIn, and chat—to engage prospects and move them through the sales funnel effectively.
Talk to SalesReady to see how Callbox builds lead gen campaign from scratch?
Callbox Difference: Outsourced Inside Sales That Delivers Results
With our AI-driven insights and tailored lead qualification, clients experience a 35% faster sales cycle, closing deals more efficiently and driving revenue growth.
Our lead nurturing and personalized engagement lead to a 50% increase in lead-to-opportunity conversion rates, accelerating the sales process and improving close rates.
Our nurturing campaigns and automated reminders help clients achieve a 65% increase in appointment show rates, ensuring that decision-makers show up and sales calls are productive.
With strategic lead qualification and continuous engagement, clients see up to a 3x increase in opportunity-to-deal conversions, making their sales pipeline more reliable and effective.
Fueling B2B Growth with Outsourced Inside Sales Expertise
We partner with companies across software, SaaS, tech, healthcare, finance, and service-based industries to build strong, qualified sales pipelines. Our outsourced inside sales teams integrate seamlessly into your sales process, offering end-to-end support for complex B2B sales cycles, from lead generation to closing deals.
Your buyers are ready to buy. Just not in English.
In every region you sell into, decision-makers do business in their own language — even the ones who speak English well. Localized, in-language outreach reaches the prospects that English-only campaigns quietly lose.
Native in-market. Brand-safe in English.
The same SDR who reaches your prospects natively is fluent enough in English to represent your brand to your own team — one coordinated program, clear reporting, no vendor handoffs.
Languages we outreach in
Spanish
LATAM & Iberia
Portuguese
Brazil & Portugal
Vietnamese
Vietnam
Bahasa
Indonesia & Malaysia
One campaign, every region — not four vendors. Every in-language message is localized by native-fluent SDRs, not machine-translated.
3-Month Program Accelerates Sales for Cybersecurity Vendor
Read full case studyA U.S.-based cybersecurity company providing enterprise-grade data protection and threat detection solutions. Its platform enables organisations to safeguard sensitive data, monitor insider threats, and maintain compliance with evolving regulations. By offering advanced visibility and analytics, the Client helps security teams reduce risk and strengthen their data security posture.
- Target location
- US-wide
- Target industry
- Finance, Healthcare, Manufacturing, Technology, Government
- Target decision maker
- CISOs, IT Security Directors, Compliance Managers, CTOs, Heads of Risk and Data Protection
Successfully executed a 3-month program for a U.S.-based cybersecurity provider.