Enrichment Waterfall for n8n

A waterfall = try cheapest/fastest vendor first, fall through to more expensive/accurate vendors only when the previous fails. This is how Clay, Clearbit, and every production enrichment pipeline actually works.

The core pattern

Input (name, email, or domain)
  ↓
Vendor 1 (cheap, fast, ~60% hit rate) — e.g., Hunter.io
  ↓ IF no match
Vendor 2 (medium cost, ~80% cumulative) — e.g., Apollo
  ↓ IF no match
Vendor 3 (expensive / LLM extract, ~95% cumulative) — e.g., SerpAPI + LLM
  ↓ IF no match
Dead letter: log as "unenrichable"

At each step, a hit short-circuits the rest. You pay only for what the cheap vendors miss.