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Bird Verify review

#16 of 25 in Multi-Factor Authentication APIsPhone Verification Software

A configurable OTP API for SMS, email, and WhatsApp verification flows.

7.4/10Editor score
Visit Bird Verify
Bird Verify7.4 Visit Bird Verify

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Bird Verify is an API for sending and checking one-time passcodes in application flows. It is designed for two-factor authentication, signup, account recovery, and passwordless login, with support for SMS, email, and WhatsApp delivery. Applications can create or retry a verification, then check a code by recipient without storing a verification ID. SDK language support includes TypeScript, Python, Go, and PHP.

The published pricing model is usage-based. The Usage-based verification plan has no Verify plan, seat fee, or platform fee: only code sends are billed, while code checks are free. Channel charges depend on the delivering channel, so the cost structure follows the selected email, SMS, or WhatsApp route rather than a fixed subscription tier. The API also provides detailed controls for code length, validity windows, attempt limits, resend cooldowns, per-recipient send caps, and verification guess limits.

Bird Verify’s strongest differentiator is the combination of multichannel delivery and routing control. Per-country channel ordering and sender resolution can shape how verification requests are delivered, while cryptographically generated codes are stored as HMAC hashes. Webhooks deliver verification lifecycle events for application workflows. It is a focused choice for developers who need configurable OTP delivery and verification controls. Applications that require TOTP, passkeys, or a broader integration ecosystem should choose a product built around those capabilities instead.

Bird Verify pros and cons

  • Where it wins
    • Supports SMS, email, and WhatsApp OTP delivery
    • Offers country-specific routing and sender resolution
    • Adds HMAC-protected codes, limits, and webhook events
  • Where it doesn't
    • API-only product with no listed non-API platform
    • Does not support TOTP
    • Channel charges vary by email, SMS, or WhatsApp delivery

Bird Verify fact sheet, pricing and score →

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