What is OTP authentication?

OTP authentication is a secure login method where users receive a one-time password via SMS, WhatsApp, email, or voice to verify their identity.

How is Authyo different from other OTP providers?

Authyo offers multi-channel OTP delivery with an intelligent fallback system that automatically switches between SMS, WhatsApp, email, and voice for higher delivery success.

Does Authyo support passwordless login?

Yes, Authyo supports passwordless authentication using OTP, magic links, and numeric codes without requiring users to remember passwords.

What is the difference between OTP and MFA?

OTP is a single-step verification method, while multi-factor authentication (MFA) combines OTP with additional security factors for stronger protection.

Can I send OTP via WhatsApp?

Yes, Authyo allows OTP delivery via WhatsApp along with SMS, email, and voice to improve user experience and conversion rates.

Is Authyo suitable for Indian businesses?

Yes, Authyo is built for Indian and global businesses with high OTP delivery rates, WhatsApp support, and compliance-ready infrastructure.

How long does it take to integrate Authyo?

Authyo can be integrated within minutes using APIs, SDKs, or plugins with developer-friendly documentation.

Secure User Authentication with OTP, MFA & Passwordless Login

Authyo secures user logins with a powerful passwordless authentication API for modern apps and websites. Developers can easily implement OTP verification and multi factor authentication using SMS, WhatsApp, Email, or Voice to create secure and seamless login experiences without relying on traditional passwords.

Authyo also ensures reliable OTP delivery with an intelligent fallback system. If SMS OTP fails, it automatically switches to WhatsApp, Email, or Voice Call, ensuring users always receive their verification code and can log in without interruption.

* No credit card required · OTP fallback enabled by default

All-In-One Authentication Platform

Authyo provides OTP authentication, passwordless login, and multi-factor authentication in a single, easy-to-integrate platform. Replace outdated passwords with secure, modern verification.

Stronger Security With MFA & OTP

Secure user accounts with MFA authentication, OTP verification, and passwordless login. Reduce fraud, prevent account takeovers, and stay compliant with modern security standards.

Better User Experience

Remove password frustration and reduce login failures. Let users sign in quickly using OTP via SMS, WhatsApp, Email, or Voice Call — no passwords required.

Built To Scale Globally

Authyo supports global OTP delivery with automatic fallback and email OTP verification, ensuring high success rates even in regions where SMS delivery fails. Scale your authentication without worry.

Trusted By Businesses Worldwide

From startups to global enterprises, businesses trust Authyo for reliable authentication and OTP delivery. Built to scale securely across regions, industries, and user volumes.

Designed to deliver seamless user experiences without compromising security or
performance.
Secure logins with OTP, MFA, 2FA authentication, and passwordless authentication
Seamless onboarding without passwords
High-delivery OTP with smart fallback (SMS, WhatsApp, Email, Voice)
Easy API integration and developer-friendly SDKs

Authyo WordPress Authentication Plugins

Explore Authyo-powered WordPress plugins designed for seamless OTP verification, Passwordless Authentication API integration, passwordless login, and advanced user authentication — built for performance and security.

Explore WordPress Plugins →

Customer Stories

Trusted by Growing Businesses for Secure Authentication

See how companies improve login security, OTP delivery, and user experience using Authyo’s passwordless and multi factor authentication solutions.

Authyo provides reliable OTP authentication with excellent technical support. The API is easy to integrate, and OTP delivery works smoothly across SMS, Email, and WhatsApp.

Distributor

Tally Software

Authyo helped us improve login security using OTP and multi-factor authentication. OTP fallback options reduced login failures, especially for users in India.

Marketing Manager

Uber cabs, India

Authyo delivers enterprise-grade OTP authentication with high delivery accuracy. The dashboard is user-friendly, and authentication reliability is excellent.

Product Head

Tata Teleservices Pvt. Ltd

Created By Developers, Tailored For Developers

Secure Your Users In Just 3 Steps

Comprehensive platform for all your identity needs

Authentication Built for Security, Reliability, and Scale

Authyo helps businesses implement passwordless login, multi-factor authentication, and reliable OTP verification with global delivery and smart fallback options — powered by our Passwordless Authentication API.

Passwordless Authentication

Enable secure login without passwords using email or phone number verification. Reduce login friction, prevent credential theft, and improve user experience across devices.

Multi-Factor Authentication (MFA)

Add an extra layer of security with OTP-based multi-factor authentication using SMS, Email, WhatsApp, or Voice Call for stronger account protection.

Customizable Workflows

Design authentication flows that match your business needs — from login and signup to transaction verification and account recovery.

Global SMS & WhatsApp OTP Delivery

Ensure OTP delivery worldwide with automatic fallback to WhatsApp, Email, or Voice Call when SMS fails — ideal for high-OTP regions like India and Southeast Asia.

Developer-Friendly Integration

Integrate Authyo quickly using simple APIs and SDKs. Clear documentation and fast setup help developers go live in minutes.

Real-Time Analytics

Track OTP delivery, login success rates, and authentication performance in real time to optimize security and user experience.

Comprehensive platform for all your identity needs

Multiple Authentication Methods with Smart OTP Fallback

Authyo supports passwordless login, OTP authentication using SMS, Email, WhatsApp, Social Login, and Voice Call — with automatic fallback to ensure delivery.

SMS OTP Authentication

Secure user verification using time-bound OTPs delivered via SMS, optimized for global delivery.

WhatsApp OTP Authentication

Send OTPs instantly via WhatsApp when SMS delivery is delayed or unavailable. Ideal for high-OTP regions like India.

Social Login Authentication

Allow users to sign in using Google, Facebook, or other trusted platforms without creating passwords.

Magic Link & Numeric Code Login

Enable passwordless authentication using secure magic links or numeric codes sent via email, SMS, or WhatsApp.

Inbound SMS Verification

Verify users through inbound SMS responses, commonly used in regions with limited outbound OTP reliability.

Email OTP Authentication

Authenticate users using one-time passwords delivered to email — a reliable fallback when SMS or WhatsApp is unavailable.

Authyo automatically switches between SMS, WhatsApp, Email, and Voice Call to ensure OTP delivery — even when one channel fails.

Customer Stories

Trusted Authentication Platform for Secure User Verification

Explore how businesses are transforming their authentication processes with Authyo, a trusted multi factor authentication provider.

GDPR Compliant Authentication & Data Protection

ISO 27001 Certified Information Security Management

ISO 9001 Certified Quality Management Systems

Start Building Secure Experiences Today

Free to Start

No upfront costs or commitment required.

Future-Ready

Designed to grow with your business.

Faqs

OTP (One-Time Password) authentication is a secure login method where users receive a temporary code via SMS, WhatsApp, email, or voice to verify their identity through OTP authentication.

Authyo offers multi-channel OTP delivery with an intelligent fallback system. If SMS fails, OTP is automatically delivered via WhatsApp, email, or voice—ensuring high delivery rates and better user experience.

Yes. Authyo supports passwordless authentication using OTP, magic links, and numeric codes, allowing users to log in without remembering passwords.

OTP uses a single verification step, while MFA authentication adds extra security by combining OTP with additional factors like device verification or email authentication.

Yes. Authyo supports WhatsApp OTP along with SMS, email, and voice, making it ideal for Indian and global users where WhatsApp has higher engagement.

Absolutely. Authyo is built for Indian use cases with high SMS reliability, WhatsApp support, DLT compliance, and global scalability.

You can integrate Authyo within minutes using our APIs, SDKs, or plugins. Developer-friendly documentation ensures quick setup.

Yes. You can start for free with no upfront cost and no credit card required.