Examples of leading B2B database companies:

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B2B Lead Generation Database Companies
B2B database companies specialize in providing contact information for professionals within organizations, along with firmographic (company size, industry, revenue), technographic (technology stack), and intent data (signs that a company is looking for a specific product/service).

How B2B Database Companies Acquire Data:

Public Records and Company Websites: Information readily available on company websites, press releases, and public filings.
Professional Social Networks: Data from platforms like LinkedIn, often obtained through scraping (which can be against terms of service) or through official API partnerships.
Contributing Networks: Some platforms rely on their users contributing contact information in exchange for access to the database.
AI and Machine Learning: Algorithms analyze vast amounts of online data to identify company and contact information.
Human Verification: Many top-tier B2B data providers employ human researchers to verify the accuracy and completeness of the data.
Event and Partnership Data: Data gathered from trade shows, webinars, and industry partnerships.
Intent Data Providers: Companies like Bombora specialize in identifying "buyer intent" signals by tracking content consumption across the web, indicating a company's active research in a particular solution.

ZoomInfo: One of the most comprehensive sales intelligence platforms, offering a vast database of B2B contacts and companies, along with firmographic, technographic, and intent data.
Apollo.io: A popular sales intelligence and engagement platform providing extensive B2B contact data, lead generation tools, and CRM integration. Known for its search filters.
Lusha: A data provider platform that helps sales and marketing teams find and connect jamaica whatsapp database with B2B prospects, offering contact information and seamless CRM integration.
UpLead: Known for its high data accuracy and a large database of B2B email addresses and mobile numbers. Offers filters like industry, company size, and job title.
Cognism: A sales intelligence platform with a strong focus on European B2B contact data, emphasizing GDPR and CCPA compliance and verified mobile numbers.
Seamless.AI: A real-time search engine for B2B contact information, providing direct dial phone numbers and email addresses.
Clearbit: Integrates with existing tech stacks to provide consistent, up-to-date B2B data for marketing, sales, and analytics. Offers data enrichment.
Hunter.io: Primarily known for its email finder, allowing users to find email addresses associated with specific company domains.
Leadfeeder: Identifies companies visiting your website, even if they remain anonymous, and provides company insights and contact information for decision-makers.
RocketReach: A widely used sales lead database for finding email addresses, phone numbers, and social media profiles.
Lead411: A B2B sales leads database powered by intent data.
SalesIntel: A B2B data provider emphasizing human-verified data and a robust database.
Snov.io: Offers a B2B contact database with a focus on email verification and automation.
Kaspr: A B2B contact database tool to streamline lead generation and data enrichment.