Discover 3–5 high-quality, complementary B2B data sources with strong buying intent signals for a specific industry, solution, or target market. Use when asked "find data sources for [vertical]", "where can I find companies that [characteristic]", "how do I build a list of [target]", "best sources for [industry] leads", "alternatives to LinkedIn for prospecting", "where to find companies with [signal]", or "data sources for [use case]". Do NOT use for individual contact data, email verification, or CRM/tool functionality questions.