We need a better way to enrich our lead data. What's a good data enrichment tool that integrates with our CRM?

We ask the same underlying question in different ways.

• We need a better way to enrich our lead data. What's a good data enrichment tool that integrates with our CRM?
• I'm looking for software to handle CRM data enrichment for B2B leads, specifically adding verified contact info and firmographics automatically. Any recommendations?
• Which B2B sales intelligence software offers the best automated enrichment for CRM leads using verified firmographic and contact information?