Straight answers on how verification works, what it should cost, and how to add it to your site for a flat ½¢.
A plain-English guide to SMS verification — how the code flow works, what providers charge, and how to add it to your own signup or contact form in minutes for a flat ½¢.
Read →How phone verification works, the methods (SMS, iMessage, voice), what it should cost, and how to verify a number on your own site for a flat ½¢.
Read →What OTP verification is, SMS OTP vs authenticator (TOTP), what makes a one-time code secure, and how to send OTPs for a flat ½¢.
Read →How SMS OTP works, why deliverability and autofill make or break it, code-format best practices, and how to send SMS one-time codes for ½¢.
Read →How SMS 2FA works, its honest security tradeoffs versus authenticator apps, when SMS 2FA is the right call, and how to add it for ½¢.
Read →The two meanings of phone number verification — validation (lookup) vs possession (a code) — and how to do both to stop fake signups. Flat ½¢.
Read →A developer's guide to the SMS verification API — start a verification, check the code, the rules (expiry, single-use, channel) — with examples. Flat ½¢.
Read →What makes a good phone verification code — length, expiry, single-use, and autofill — so more users actually complete it. ½¢ to send.
Read →An honest comparison of iBlueText and Twilio Verify — price (½¢ vs ~5¢), iMessage delivery, setup, and built-in proof of consent.
Read →iBlueText vs Firebase phone authentication — cost, iMessage delivery, vendor lock-in, and built-in consent logging.
Read →iBlueText vs Vonage (Nexmo) Verify — price, iMessage delivery, and built-in proof of consent.
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