⚡ Core Logic: Waterfall ICP
BlitzAPI’s most popular feature is the Waterfall ICP Search. It solves a common engineering challenge: mapping a target account to a specific decision-maker without manual filtering. Instead of retrieving a raw list of employees, you define a priority hierarchy. The API executes a cascading search until it matches your criteria.1. Define the Cascade
You configure a JSON rule: “First, look for the CEO in the US. If not found, look for the VP of Sales. If not found, look for a Sales Director.”
2. Intelligent Routing
The API queries our proprietary dataset in priority order, stopping as soon as your criteria are matched.
Read the Waterfall Logic Docs
See how to construct hierarchical queries to maximize relevance.
♾️ Flat-Rate Unlimited
BlitzAPI is a flat monthly subscription — no per-request fees, no overage surprises. Choose the plan that unlocks the APIs you need.| Plan | Price | Includes |
|---|---|---|
| Unlimited Leads | $399/mo | Waterfall ICP, Company Search, Employee Finder, Domain→LinkedIn, and more |
| Unlimited Email | $499/mo | Everything above + Email Enrichment (62M+ emails, 97% accuracy) |
| Unlimited Phone Numbers | $599/mo | Everything above + Phone Enrichment (US only, +40M mobile numbers) |
See full plan comparison
Detailed feature matrix, use case guide, and free trial info.
What do you want to build?
Select the documentation path that matches your technical goal.Quick Start
Get your API Key and execute your first enrichment request via cURL.
Full Workflow
Learn how to chain Search, Enrichment, and Validation into a single automated pipeline.
Pricing & Limits
Technical details on rate limits (RPS), concurrency, and fair use policies.
API Reference
Interactive OpenAPI documentation to test endpoints and view schema definitions.
Supported Integrations
BlitzAPI acts as the data engine behind your existing stack.| Category | Compatible Tools |
|---|---|
| Orchestrators | n8n, Make (Integromat), Zapier |
| Data Operations | Clay, Airtable, Google Sheets |
| CRM & Sales | HubSpot, Salesforce, Pipedrive |
| Outreach | Smartlead, Instantly, Lemlist |
Building a custom integration? Our API is platform-agnostic. As long as your tool can make an HTTP POST request, it works with BlitzAPI.