How to find verified work emails programmatically — waterfall enrichment tries 6 providers (Dropleads, Hunter, LeadMagic, Deepline Native, Crustdata.
Deepline’s email waterfall tries up to 6 providers in cost order — Dropleads (0.3 credits), Hunter (0.3 credits), LeadMagic, Deepline Native, Crustdata, and PeopleDataLabs — and stops at the first valid hit. Typical cost: 0.3-0.4 credits per lookup. Just describe what you need in natural language — Deepline picks the right waterfall variant automatically.
Single-provider enrichment commonly leaves coverage gaps. Waterfall enrichment improves match rates by querying multiple providers in sequence. Specific lift varies by ICP and region. B2B data decays at roughly 22.5% per year (HubSpot via Cognism), so a single-provider lookup goes stale fast. The 6-provider waterfall cross-references multiple sources in real time to compensate.
The waterfall reads your input columns, picks a provider chain, and tries each provider cheapest-first until it finds a verified email. You only pay for providers that ran. Most lookups resolve on the first or second provider (0.3-0.4 credits).
1
Analyze your input columns
Deepline inspects your CSV headers or payload fields to determine which
waterfall variant to use.
2
Route to the right waterfall
Based on available data, Deepline selects the optimal provider chain (see
provider details below).
3
Try providers in cost order
The cheapest provider runs first. Each result is validated before accepting.
4
Return verified email
The first valid, non-catch-all email is returned. You only pay for providers
that ran.
If you have name + domain but no company name, Deepline uses the cost-aware
waterfall that tries free email patterns first. This can reduce spend on
lookups where the pattern matches.
How much does it cost to find a work email with Deepline?
Most lookups resolve on the first provider at 0.3 credits ($0.024). The cost-aware variant tries free email patterns first and can resolve for as little as 0.1 credits. Worst case across all 6 providers: 7.2 credits, but that rarely happens.
Yes. type /deepline-gtm find work emails for leads.csv and Deepline reads your column headers, picks the right waterfall variant, and enriches every row. You can also use the deepline enrich CLI command directly. Always pilot with 3-5 rows first to verify the waterfall is routing correctly.
At minimum, you need a name and domain (e.g., “Sarah Chen” + “stripe.com”). For the best hit rates, provide name + company name + domain. If you have a LinkedIn URL, Deepline uses a LinkedIn-optimized chain. The more identifiers you provide, the higher the match rate.
Ask for emails in plain English from your IDE or terminal and the waterfall runs automatically. Deepline selects the right provider chain based on your input, tries providers cheapest-first, and chains multiple sources without any UI configuration. You stay in your coding workflow instead of switching to a separate enrichment tool.
Deepline validates every email before returning it, filtering out catch-all addresses and invalid syntax. Multiple providers cross-check each other, which helps cover gaps left by any single provider. Specific lift varies by ICP and region. For deliverability verification, use the Email Waterfall with Validation task to chain a ZeroBounce validation step for bounce-risk scoring.
