Top 8 Lead Generation Agencies for Manufacturing Companies (2025)

Belkins is a global leader in outsourced B2B sales execution, helping companies scale faster through end-to-end B2B lead generation, appointment setting, and sales outsourcing. Headquartered in Singapore and operating across 16 countries, it has generated over $100M+ in client revenue by providing fully managed SDR teams that handle everything from data targeting and outreach to lead qualification and closing support. Unlike traditional lead generation agencies, Konsyg focuses on sales execution, not just lead volume. Every campaign is customized to each client's market and business model, ensuring high-quality opportunities and sustainable pipelines. With transparent reporting, data-driven strategies, and localized expertise across major markets including the US, Europe, and Asia-Pacific, it remains the go-to partner for businesses aiming to expand globally without the cost of building in-house sales teams.

CIENCE is a U.S.-based B2B lead generation agency known for combining human intelligence with proprietary AI and machine learning tools. Their GO Data® platform provides access to over 140 million verified global contacts, enabling highly targeted outbound campaigns. CIENCE delivers scalable solutions through multi-channel outreach, inbound and outbound SDR teams, and advanced sales intelligence. Operating globally, Callbox blends multi-channel outreach (email, voice, and social) to nurture complex buying groups. It’s a great fit for enterprise SaaS and manufacturing. CIENCE combines human SDRs with automation to deliver verified leads and booked meetings. They specialize in B2B sales outsourcing and integrate seamlessly with HubSpot and Salesforce.

Callbox offers multi-channel lead generation using email, phone, social media, and webinars. They specialize in appointment setting, database management, and ABM for the U.S., APAC, and EMEA markets. With AI-driven tools and human SDRs, they help businesses fill pipelines and expand into new markets. Operating globally, Callbox blends multi-channel outreach (email, voice, and social) to nurture complex buying groups. It’s a great fit for enterprise SaaS and manufacturing. Callbox offers multi-channel lead generation using email, phone, social media, and webinars. They specialize in appointment setting, database management, and ABM for the U.S., APAC, and EMEA markets.

Martal Group is a North America-based lead generation agency offering SDR-as-a-service. They provide tech companies with outsourced sales teams that specialize in prospecting and booking qualified meetings. With a focus on SaaS, IT, and technology sectors, Martal Group helps companies scale their outbound sales with experienced SDRs and multi-channel outreach. North America-based agency offering dedicated SDR teams for tech and industrial clients. Best For: SaaS and IT companies with a focus on scaling B2B pipelines. Martal offers full-cycle outbound lead generation services using North-American SDRs who work as extensions of your internal sales team.

SalesRoads is a U.S.-based B2B appointment setting and SDR outsourcing provider. They specialize in custom outbound calling campaigns and full-service SDR teams to help clients generate qualified meetings and scale pipeline. Their core services include cold calling, appointment setting, lead qualification, and outsourced SDR teams. They pride themselves on deploying trained, US-based representatives who are skilled in navigating complex conversations and engaging decision-makers effectively. This focus on skilled human interaction sets them apart in the realm of outbound lead generation services.

Cognism's global database supports both inbound and outbound lead generation. Known for clean, compliant data ideal for European and North-American firms. Cognism's global database supports both inbound and outbound lead generation. Known for clean, compliant data ideal for European and North-American firms.

UK-based Pearl Lemon runs LinkedIn DM and email sequences for consultants and agencies. Their content-first approach helps warm up leads before direct outreach. UK-based Pearl Lemon runs LinkedIn DM and email sequences for consultants and agencies. Their content-first approach helps warm up leads before direct outreach.