Allegrow

Allegrow is a B2B email verification and deliverability platform operated by Direct Software Limited. It helps data providers, go-to-market teams, sales organizations, and automation builders identify reachable business contacts and protect sender reputation. A core focus is verifying catch-all domains and corporate Secure Email Gateways, which can cause conventional tools to return inconclusive “Unknown” results. Allegrow aims to provide clearer valid or invalid statuses, detect primary mailboxes, and distinguish active users from aliases, spam traps, disposable addresses, and inactive inboxes.

The platform offers email verification, CRM data cleaning, risk detection, and deliverability tools for monitoring domain health and email placement. Its features include gateway resolution, managed verification IPs, configurable API controls, and unlimited verification options on its Scale-Plus plan. Customers can connect Allegrow with services such as HubSpot, Salesloft, Outreach, Apollo, ZoomInfo, Clay, Google Workspace, and Office 365, or integrate through its public API. Allegrow also provides a knowledge base, free resources, and a 14-day free trial.