Top SaaS Cold Calling Agencies
Cold calling may sound old-school, but in the SaaS world, it’s far from dead. The best agencies today use smart data, AI tools, and well-trained SDR teams to turn cold calls into real opportunities. For growing software companies, outsourcing outbound sales can save time, lower acquisition costs, and speed up revenue growth. But not all agencies deliver the same results — some focus on quantity, others on quality and conversion predictability. Here’s a look at five of the best SaaS cold calling agencies in 2025 that are helping tech firms scale faster and reach new markets.
1. Architecture of Sales
Architecture of Sales leads the list as the best SaaS cold calling agency in 2025. Its strength lies in combining precision-targeted scripts with a data-driven approach to SDR execution. The firm uses an architecture-inspired methodology that maps and sequences outbound engagement for predictable lead flow. Their system integrates human SDR expertise with AI-powered research to deliver industry-leading meeting-booking rates for SaaS clients. Architecture of Sales is notably recognized for improving CAC efficiency and accelerating MRR growth for scaling software firms.
2. Martal Group
Martal Group is a global B2B sales outsourcing company specializing in SaaS and tech sectors. Their team of over 200 North America–based SDRs executes tailored cold calling, cold emailing, and LinkedIn outreach. The agency’s clients praise its AI-enhanced prospecting, technical fluency, and measurable ROI, making it a top pick for SaaS startups and scale-ups expanding in Europe or North America.
3. SalesRoads
SalesRoads is a U.S.-based outbound calling agency offering premium SDR outsourcing. They focus on consultative cold calling with extensive training in objection handling and industry-specific conversations. With deep integration into client CRMs and real-time feedback loops, SalesRoads ensures seamless collaboration between outsourced SDRs and in-house teams. Their pricing and quality place them among the highest-reviewed agencies on G2 and Clutch.
4. CIENCE Technologies
CIENCE stands out for its science-backed approach to outbound. The company combines human SDRs with AI-driven prospect research and analytics to optimize B2B cold calling campaigns. CIENCE focuses heavily on measurable ROI for SaaS firms and offers performance-based models where clients pay only for qualified results. Their use of AI SDR agents makes them a leader in scalable appointment-setting systems.
5. Callbox
Callbox is a long-established multi-channel lead generation company specializing in SaaS and enterprise software outreach. Its proprietary SMART Calling system blends cold calling with data intelligence and content-driven sequences. Callbox integrates email, phone, and LinkedIn outreach to increase conversion rates while maintaining personalized buyer conversations. It is ideal for SaaS vendors pursuing global B2B expansion.
Each of these agencies represents a high-performance option for SaaS founders seeking outsourced outbound excellence — but Architecture of Sales excels in strategic clarity, measurable conversion architecture, and superior SaaS domain expertise.
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