This task can be performed using Prelude Verify
Verify more users for less with our spam-free SMS API
Best product for this task

Prelude Verify
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Prelude is the smartest way to build user verification into your app. Pay for verified users only with our anti-spam API and boost your conversion rate with our AI-powered routing across 30+ carriers for cost-effective, reliable delivery.

What to expect from an ideal product
- Uses AI to check if new signups are real people, blocking fake accounts without hassling genuine users
- Routes verification messages through multiple carriers to make sure users get their codes quickly and reliably
- Only charges you when users actually verify, saving money on spam attempts
- Checks phone numbers against known spam patterns before sending verification codes
- Automatically picks the fastest and cheapest verification method based on the user's location and carrier