Allegrow

About Allegrow

Stop losing valid contacts to "unknown" data. Allegrow is the highest quality B2B email verifier built to help data providers & GTM teams increase data quality, prevent bounces, and unlock pipeline hidden behind enterprise and catch-all servers.
Legacy verification tools rely on outdated smtp pings that fail on modern B2B infrastructure. They mark 30% of your list as "unknown", miss hidden spam traps, and fail to validate secure email gateways (segs).
Allegrow is the enterprise-grade solution to this challenge.
We use a proprietary signals-based engine to navigate catch-alls & enterprise servers protected by secure gateways like proofpoint & mimecast, giving you accurate, conclusive results where others leave you guessing.
Why data providers and enterprise GTM teams choose allegrow:
- conclusive 'valid'/'invalid' status responses on catch-all domains to safely expand your tam
- verify enterprise mailboxes hidden behind the world’s toughest spam filters
- distinguish the primary operational email from unmonitored secondary aliases
- flag modern spam traps, disposables, and dead mailboxes
- custom API speeds for both synchronous and asynchronous builds
- customizable verification method mix for data providers (smtp vs. Signals-based)
- block risky sends automatically via native integrations with HubSpot, outreach, and salesloft.
- unlimited email verification (no credit limits via integration or csv)
- managed high-quality ips for greylisting resolution
- fully gdpr & soc 2 compliant
- access a complete deliverability suite to monitor inbox placement, a/b test content against filters, and automate mailbox warm-up
Trusted by publicly traded B2B companies and the world's largest data providers.
Visit our website to start a 14-day free trial. Verify 1,000 of your toughest contacts to see for yourself how our best-in-class verification solves the "unknowns" that legacy verifiers can’t.