One people database is not enough — start with the company, then widen the path

No vendor covers every market equally. One database may be strong in US SaaS titles and weak in local professional services. Teams that bind their whole motion to a single people API see coverage cliffs and bounce spikes when they expand geography or industry.

The industry answer is often labeled waterfall enrichment: try source A, then B, then C until a usable email appears. The principle matters more than the brand name — multiple paths beat one brittle feed — but only after you know the company is worth contacting.

Finding a random verified email is easy and useless if the account is a peer or wrong vertical. Fit the company with ICP scoring. Then hunt people: public search snippets, company-site contacts, and deeper people search when configured. Verify the address before your SMTP send. That is multi-source with a gate.

• Score or rank the company against what you sell
• Find people at that company — not a global title scrape
• Use more than one discovery path when the first is thin
• Verify mailbox signals before the first outbound touch

Lead Search finds companies, then people at selected accounts. Deep Search (when enabled) is an additional path for decision-makers at companies you already chose. Site and public-web signals complement the people table. Enrichment credits unlock details on keepers. Email verify checks deliverability-style signals. You send through SMTP you own.

B2BLead does not sell a 100-provider waterfall marketplace. It sells self-serve research software: company fit, multi-path people discovery, metered enrichment, and CRM — without a static contact list as the product.

If three paths return nothing usable, park the account or try phone via a BYOK voice provider. Endless provider hopping on a weak-fit company is still waste. Coverage goals belong on the shortlist, not on the whole TAM dump.