Cold calling is far from dead—in fact, it’s resurging in 2025 thanks to better data, AI-powered dialers, and professionally trained SDRs. For businesses looking to grow their pipeline, especially through direct outreach, lead generation companies are finding tremendous value in cold calling services that are smart, personalized, and seamlessly integrated into larger campaigns.
Modern cold calling blends personalization, smart timing, and omnichannel support (follow-ups via email or LinkedIn). It’s no longer just about making calls—it’s about making the right calls to the right people with the right message. This list highlights agencies that are successfully executing high-converting cold call programs in 2025.
Post Contents
1. Martal Group
- Founded: 2009
- Specialty: B2B lead generation, appointment setting, full-cycle sales outsourcing
Overview:
Martal Group leads the field in 2025 for companies seeking expert cold calling services that drive real results. Their North America, Europe, and LATAM-based sales experts—each with 3–5 years of B2B business development experience—deliver highly personalized, professional phone outreach that resonates with decision-makers.
Martal’s cold calling is never siloed—they combine it with LinkedIn and email in coordinated omnichannel campaigns. Whether you’re targeting a broad or niche market, Martal’s sales experts adapt tone, timing, and message to each ICP. For companies that want results—not just dials—Martal is the go-to cold calling partner for full-cycle sales success.
2. Callbox
- Founded: 2004
- Specialty: Multichannel lead generation, appointment setting, and pipeline development
Callbox is a long-standing name in the outbound marketing game. In 2025, they will continue to shine with high-volume calling capabilities tailored for industries like healthcare, IT, and consulting.
Their proprietary CRM and multi-touch automation platform allow for seamless coordination across email, LinkedIn, and voice, maximizing engagement rates. Callbox also offers intent data integration, helping businesses prioritize hot leads and get in front of prospects at the right time.
3. Intelemark
- Founded: 2000
- Specialty: B2B cold calling, appointment setting, market research
Intelemark remains a trusted name for businesses that want more than just a scripted pitch. This U.S.-based agency emphasizes real, human-to-human conversations that focus on building credibility and interest.
With a consultative approach, they tailor every outreach campaign to reflect the client’s tone, values, and audience profile.
4. EBQ
- Founded: 2006
- Specialty: Outsourced sales, marketing, and customer success teams
EBQ offers fully U.S.-based SDR teams that integrate directly into your sales process. What sets them apart is their commitment to alignment—with your CRM, your messaging, and your goals.
Rather than treating cold calling as a standalone service, EBQ builds it into a full sales development strategy. Their SDRs operate as true extensions of client teams, collaborating closely to ensure each lead meets specific qualification standards.
5. Upcall
- Founded: 2016
- Specialty: On-demand outbound calling, lead qualification, appointment setting
Upcall provides a flexible and scalable solution for businesses that want to test or expand cold calling without committing to in-house teams. Their platform connects clients with top U.S.-based SDRs who can launch campaigns quickly and deliver measurable results.
What makes Upcall attractive in 2025 is its real-time dashboard, where clients can track call performance, listen to recordings, and refine scripts on the fly. It’s an agile solution with enterprise-grade results.
6. Calling Agency
- Founded: 2015
- Specialty: Cold calling services for startups, SMEs, and marketing firms
Calling Agency is a reliable partner for businesses looking for affordability without compromising on quality. With professionally trained remote callers, they offer custom packages that suit various industries and budgets.
Their SDRs prioritize quality conversations over quantity, helping clients improve brand perception and uncover warm leads ready for nurturing. This makes them a great choice for early-stage businesses or marketing agencies seeking white-label solutions.
7. Blue Valley Telemarketing
- Founded: 1991
- Specialty: Outbound B2B calls, lead verification, database updates
Blue Valley Telemarketing has a solid reputation as a no-nonsense cold calling provider. Based in the U.S., they offer services geared toward the publishing, industrial, and event sectors. Their strength lies in compliance and data accuracy—making them a top choice for clients who need verified, clean leads.
With decades of experience, Blue Valley is ideal for campaigns where regulatory alignment and accurate targeting are critical.
Conclusion
Cold calling in 2025 isn’t about volume—it’s about value. The most successful lead generation companies understand that cold outreach needs to be thoughtful, strategic, and aligned with broader business development goals. From omnichannel support to CRM integration and real-time tracking, these cold calling services offer much more than just someone to make calls.
When evaluating the best agency for your business, consider your industry, regional focus, compliance needs, and whether you’re looking for full-cycle sales development or just top-of-funnel lead generation. The agencies featured above represent the best of the best in 2025—each bringing a unique approach to personalized, scalable, and effective cold calling.