Fall back to another channel without restarting the verification.

Deliver one-time passcodes across SMS, WhatsApp, voice, and email so a dropped carrier text or missing app never costs you a signup. Bird automatically falls back when a send fails or lets users switch to another channel on demand, keeping earlier codes, expiration timers, and attempt limits intact without custom retry state.

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Keep signup moving when the first code does not arrive. Use the next eligible channel in the recipient’s plan.

User-requested fallback Explore channel configuration

Route verification codes across channels
while keeping one active session.

Set per-country channel order once and let Bird handle carrier fallbacks, user-triggered channel switches, and code validity across all attempts.

Explore Verify fallback delivery

Configure channel priority by country.

Choose which channels to try first in each market, such as WhatsApp before SMS or voice and email as backups, and narrow or reorder that list per request when needed. If a carrier rejects the first send or WhatsApp is unavailable, Bird automatically advances to the next channel in your plan.

Let users switch channels without waiting.

Power an “I didn’t receive my code” button that moves the verification to the next available channel immediately. Because switching channels is a deliberate fallback rather than a repeat send on the same route, Bird sends the new code right away without making the user wait out your resend cooldown.

Accept any valid code across retries.

Codes sent during an active verification remain valid until the original expiration window closes or the attempt limit is reached. If a delayed SMS arrives right after the user switches to email or requests a resend on the final channel, either passcode verifies the user cleanly without creating competing sessions.

Keep building
with Verify.

Configure country routing rules, tune expiration and retry timers, and inspect every delivery attempt.

Country controls

Set per-country channel order, assign local senders, and block destinations you do not serve.

Code controls

Configure passcode length, expiration windows, attempt limits, and resend cooldowns.

Verification logs

Trace every channel attempt, delivery status, and code check when a user cannot sign in.

Explore Verify

Scale without
losing control.

Organize teams in workspaces, control API access, and trace changes through audit logs.

WorkspacesTeam rolesAPI authentication
Explore Enterprise

Start with Verify.
Build across channels with Bird.

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Start building with Bird in minutes.

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