Outsourced Lead Generation Companies/BPOs:

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Many agencies specialize in generating B2B leads through telemarketing, either by providing qualified lists or portugal telegram number database by conducting outbound campaigns on your behalf.
In Bangladesh (relevant to your location): Several BPO companies offer B2B lead generation and telemarketing services. Some examples from search results include:
SkyTech Solutions
Net Bangla Limited
Call Point Business Solutions Ltd.
360-Supports
AndLeads (located in Rajshahi)
You can also find B2B lead generation freelancers on platforms like Upwork, many of whom are based in Bangladesh.
Referrals:

Existing satisfied B2B clients are often the best source of new, high-quality leads.
Key Considerations for B2B Telemarketing Leads:
Compliance: This is critical. Ensure your lead generation methods and telemarketing practices comply with all relevant regulations, including Do-Not-Call (DNC) registries, data privacy laws (like the upcoming Data Protection Act in Bangladesh), and any industry-specific rules.
Lead Nurturing: B2B sales cycles can be long. Leads generated through telemarketing often require consistent follow-up and nurturing through multiple channels (email, LinkedIn, additional calls) to move them through the sales funnel.
CRM Integration: A robust CRM system is essential for managing your B2B leads, tracking interactions, setting reminders, and ensuring a seamless handoff to your sales team.
Telemarketer Skill: B2B telemarketing requires highly skilled agents who can understand complex business needs, engage in consultative conversations, and handle objections professionally.
By focusing on acquiring high-quality, compliant B2B telemarketing leads and employing effective telemarketing strategies, businesses can significantly improve their sales pipeline and drive revenue growth.