What's the best waterfall for finding work emails?

Best practice: Find first, validate once at the end

The typical mistake is validating during the waterfall, which wastes credits when emails are already valid.

Optimal approach:

1. Run email finding waterfall with stop-on-found (no validation in waterfall)
2. Validate ALL found emails in a single pass at the end

Recommended waterfalls by use case:

Use Case	Waterfall	Why
B2B SaaS (US)	Apollo → Findymail → Hunter	Best coverage for tech companies
Enterprise/Fortune 500	Findymail → Apollo → Clearbit	Better corporate domain coverage
EU/GDPR Markets	Dropcontact → Findymail	GDPR-compliant providers first
SMB/Local Business	Hunter → Apollo → Findymail	Hunter has good SMB coverage

Key configuration:

• stop_on_first_result: true - Stop the waterfall as soon as any provider returns an email
• validate_after_waterfall: true - Not during
• dedup_before_run: true - Avoid duplicate lookups