In-House vs. API-First for Phone Validation: A Deep Dive
Blog post from Didit
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Reliable phone number validation supports account creation, password resets, multi-factor authentication, transaction checks, fraud prevention, customer experience, and regulatory compliance, but businesses must choose between building systems internally and using specialized API providers. In-house systems provide control and customization but require substantial development, maintenance, carrier negotiations, global delivery management, and continuous fraud-detection updates. API-first services are presented as faster to deploy and easier to scale, shifting infrastructure, compliance, carrier connectivity, and evolving security responsibilities to providers while typically using subscription or usage-based pricing. The material positions Didit as an AI-native, modular phone-verification provider offering OTP delivery, carrier detection, disposable and VoIP number checks, risk scoring, developer tools, integrations with other identity-verification services, and a free or pay-per-successful-check pricing model.
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