Why You Should Use Two Factor Authentication

Improved security

Experience security like never before. Ensure that only verified individuals can access sensitive software applications.

Reduced fraud

2FA acts as an unbreakable wall. Fend off threats to your clients' online security and mitigate account takeovers.

Reduced help desk costs

Enable secure, self-served password resets. Enjoy enhanced UX and save on expensive IT helpdesk operations.

PRICE
Pricing
CountryDomestic rateInternational rate
Ukraine1.2800 UAH1.2800 UAH
Poland0.0240 €0.0240 €
Lithuania0.0150 €0.0150 €
Latvia0.0150 €0.0150 €
Estonia0.0150 €0.0150 €
Germany0.0450 €0.0450 €
France0.0450 €0.0450 €
Spain0.0350 €0.0350 €
Italy0.0450 €0.0450 €
United Kingdom0.0400 €0.0400 €
Other countries0.0500 €0.0500 €
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Two-Factor Authentication with SMS, Viber & Flash Call OTP

Protect user accounts with SMSBAT two-factor authentication. Deliver one-time passwords (OTP) through SMS, Viber, and Flash Call verification from a single REST API, with global coverage and automatic channel cascading for the best cost and delivery.

Flash Call verification authenticates a user with a missed call instead of a text message — the code is the last digits of the calling number — which is faster and cheaper than SMS OTP in many countries.

Multi-channel OTP delivery

Send verification codes over SMS, Viber Business Messages, or Flash Call. SMSBAT can cascade automatically — try the cheapest channel first and fall back to the next — so every code is delivered at the lowest possible cost.

Flash Call verification

Flash Call authenticates users with a missed call whose number ends in the verification code. It removes the SMS cost, works where SMS is unreliable, and delivers in seconds, improving both conversion and margins.

One API, global reach

Integrate 2FA once and reach users worldwide. SMSBAT handles routing, sender IDs, and delivery reporting so your team can focus on the product, not on telecom operators.

Why use SMSBAT for 2FA

  • ✓OTP via SMS, Viber, and Flash Call from one API
  • ✓Automatic channel cascading for lowest cost
  • ✓Flash Call verification — faster and cheaper than SMS
  • ✓Global coverage with high delivery rates
  • ✓Real-time delivery and verification reporting
  • ✓Pay-as-you-go pricing, no monthly fees

Frequently asked questions

What is two-factor authentication (2FA)?

Two-factor authentication adds a second verification step — usually a one-time password (OTP) sent to the user — on top of a password. SMSBAT delivers 2FA codes via SMS, Viber, and Flash Call through one API.

What is Flash Call verification?

Flash Call verification authenticates a user with a missed call instead of a text message; the one-time code is the final digits of the calling number. It is typically faster and cheaper than SMS OTP and works where SMS delivery is unreliable.

Which channels can deliver OTP codes?

SMSBAT delivers OTP over SMS, Viber Business Messages, and Flash Call. You can enable automatic cascading so the system tries the cheapest available channel first and falls back if needed.

How do I add 2FA to my application?

Register a free business account on omni.smsbat.com and integrate the OTP / verification REST API. Documentation, authentication, and code examples are provided so you can go live quickly.