WhatAn API and testing platform that lets businesses validate whether their signup forms, CRMs, and internal systems correctly accept all valid email and domain formats including unusual TLDs.
SignalMultiple people report that major companies like Walgreens and wireless carriers reject perfectly valid email addresses with uncommon TLDs, causing real friction — one person couldn't sign up for their COVID vaccine because of it, and another has ongoing issues with their carrier.
Why NowICANN has approved hundreds of new gTLDs in recent years and more are coming, making unusual-but-valid domains increasingly common while most enterprise software validation logic remains stuck in the past.
MarketSaaS companies, healthcare providers, financial institutions, and any business with online signups pay; TAM is subset of the broader API testing market (~$2B); competitors like Mailgun validation focus on deliverability, not format acceptance correctness.
MoatBuilding the most comprehensive corpus of valid-but-unusual domain formats and edge cases creates a data moat that improves with every customer integration and bug report.
Setting up a free *.city.state.us locality domain (2025)View discussion ↗ · Article ↗ · 584 pts · May 13, 2026
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