Core Verification Capabilities
BillionVerify runs a full sequence of checks for every email address it processes, including syntax validation, domain validation, MX record lookup, live SMTP verification, reputation checks, and risk scoring. It returns standardized statuses that mark addresses as valid, invalid, unknown, risky, role-based, or part of a catch-all domain.
Single Email Verification
You can check individual email addresses one at a time before adding them to a lead list, signup form, or outbound sequence. Results display full SMTP verification details, MX record data, and a deliverability score on a single interface.
Bulk Email Verification
Upload full email lists to get a breakdown of validity distribution, status counts, and export-ready filtered segments. The platform shows clear counts for each address category so teams can separate usable contacts from low-quality data before launching campaigns.
Email List File Cleaning
Submit CSV or formatted email files for batch processing. The platform shows real-time status progress, estimates total processing time upfront, and sends a notification by email when the full list clean is complete.
Real-Time Email Validation API
The API returns structured JSON responses and works for integration into signup flows, enrichment pipelines, AI agent workflows, and any custom list processing system. It provides sub-200ms response times to keep your existing workflows running without delay.
White Label Service
Agencies and SaaS teams can launch their own branded email verification portal using their custom domain, custom brand assets, dedicated client workspaces, and built-in usage management controls for internal or client-facing use.
Supported Use Cases
BillionVerify includes pre-built workflows for common list cleaning scenarios:
Cold email list cleaning for outbound sales sequences
B2B lead list verification for purchased, scraped, or enriched lead datasets
Google Maps sourced local prospect list cleaning
Local business contact verification for local outreach campaigns
Cross-client list standardization for B2B agencies
Target Audience
BillionVerify is built for three primary user groups:
Sales teams that want SDRs to focus exclusively on reachable decision-makers instead of bounced emails
Marketing teams that need to preserve sender reputation and maintain high deliverability for every email campaign
Agencies that need a standardized list quality step for every client account before any send activity
Integrations
The platform integrates natively with most popular marketing and sales tools, including Mailchimp, SendGrid, HubSpot, Salesforce, ActiveCampaign, Klaviyo, Pipedrive, Zapier, and Make. All integrations are available directly from the public integrations page.
Key Metrics and Terms
The platform advertises 99.9% SMTP-level accuracy, with a real-time API response speed measured under 200ms. Per-email pricing starts at $0.00014, and a free forever tier provides 600 verified emails per month with no credit card required to sign up. It supports native MCP Server integration for AI agent workflows that can run email verification tasks autonomously without separate billing setup.
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