Enterprise B2B Email Verification for Data Providers & GTM
Legacy tools return "Unknown" results on catch-alls and Secure Email Gateways, forcing you to guess which ones are valid. Built for data providers & GTM teams, Allegrow provides conclusive, high-quality results on the valuable B2B contacts others discard. Stop settling for vague risk scores. Verify corporate servers with precision at unlimited scale.
Trusted by Leading Data Providers & GTM Teams
Ran Oelgiesser
Calli Taylor
Alan Talavera
"We’ve tested multiple email verification providers, and Allegrow has provided unique accuracy and being able to verify catch-all & B2B enterprise emails."
As a platform that automates outbound prospecting for sales teams, RightBound aggregates data from dozens of sources. They leverage Allegrow to ensure that the millions of B2B enterprise contacts they process meet the highest deliverability standards before reaching their clients.
"By implementing Allegrow in our outreach approach, we’ve managed to shift away from working on high volumes of low-quality prospects and move toward maximizing our engagement with high-quality prospects.[...]
In the first 12 months, using the Safety Net (SN), we prevented 75,000 harmful contacts from entering cadences, which helped safeguard our domain reputation. [...] which led to us almost doubling email send volume while keeping bounce rates below 2%. We’ve also managed to stay on top of our sender reputation score, which has reached 97%"
"One problem we saw Allegrow could solve [...] was creating quality assurance around how fresh our email contact data is. For Example, there’s data that could have come into our CRM and been fresh at the time, but if reps are re-prospecting old accounts [...], this could easily turn into emails that bounce. [...] Allegrow will analyze this data and make sure those bounces are avoided. This was a unique and powerful capability that no one else offered. [...]
Deliverability, in general, is pretty daunting, but having a solid platform like Allegrow and experts on the team who have been able to support and guide us through this has been the real difference-maker for us."
The Complete Infrastructure for B2B Email Validation
Definitive Catch-All Verification
Legacy tools shrink your TAM by marking catch-alls as "Unknown". We provide “Valid/Invalid” statuses where others fail, unlocking 30% more net-new valid contacts with precision, eliminating false negatives.
Advanced Risk Detection
Go beyond basic statuses to distinguish legitimate users from non-primary aliases, spam traps, disposables, and dead inboxes so you don't reduce accuracy by counting abandoned inboxes as valid.
Customizable API
Configure verification logic with granular control and full transparency into signal data. This ensures you can prioritize data quality and commercial value rather than relying on a one-size-fits-all approach.
Secure Gateway Resolution
SMTP checks fail against Proofpoint & Mimecast. We use automated greylisting resolution to navigate Secure Gateways, accurately identifying the decision-makers that others incorrectly flag as risky/invalid.
Managed Quality IPs
Inconsistent accuracy often stems from low IP reputation. We use dynamic proxy management to ensure all SMTP requests come from high-quality IPs, eliminating false "unknowns" caused by security filters.
Primary Email Detection
Legacy tools return multiple valid addresses for one executive. We identify the primary mailbox and filter out valid-but-secondary aliases, so you reach the active decision-maker, not an unmonitored inbox.
Unlimited Plans
Stop rationing your data hygiene. Our Scale-Plus plan offers unlimited verification volume, allowing high-velocity GTM teams to clean their entire CRM and automate workflows without the friction of credit limits.
Enterprise Security & Compliance
Your data is protected by the highest industry standards. Allegrow is SOC 2-certified, GDPR-compliant, with enterprise DPAs, annual penetration testing, and SSO for centralized access management.
Full Deliverability Suite
Go beyond verification with a complete deliverability toolkit. Monitor placements and domain health, plus automated positive email interactions, authentication checks, and A/B content tests to avoid spam filters.
Native Integrations for GTM, API endpoints for Data Teams
Plug into your existing GTM system of record in minutes, or leverage our developer-first API to build high-quality email verification directly into your data products.
The Business Impact of High-Quality Data
Whether you are selling data, sending campaigns, or building autonomous agents — Allegrow has specialized B2B verification for your use-case.
Data Providers
Maximize the speed and scale at which you source and verify B2B contacts. Allegrow acts as your data partner to navigate catch-all servers & SEGs, perform primary contact detection, and provide reliable, high-quality IPs, allowing you to unlock 30% more enterprise contacts and reduce churn.
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GTM Sales Teams
Sell with absolute certainty. Stop wondering if your prospect exists. Eliminate the frustration of bouncing emails and vague "Unknown" results. Focus your SDRs solely on valid, high-value decision-makers that are actually reachable.
AI Agents & Automation
AI agents scale fast, but hitting spam traps triggers blocks and platform suspensions that stall your operations. We act as the real-time guardrail for your automation, ensuring your agents can run at high volumes without risking your sender reputation or being shut down.
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Expert Insights for High-Quality B2B Verification & Deliverability
Proven frameworks for Data Providers and GTM teams scaling their operations.
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