Firebase OTP Alternative

Sendmator vs Firebase OTP

Backend-friendly OTP verification. Works with any stack, no Firebase dependency.

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100 free SMS • Works with Node, Python, PHP, any backend

Backend
Server-Side Ready
Works with any backend stack
No Lock-in
Stack Agnostic
No Firebase dependency
3 Channels
Multi-Channel
Email, SMS, WhatsApp

Feature Comparison

Feature Firebase Sendmator
SMS OTP
Email OTP
WhatsApp OTP
Works Without Firebase
Backend API Limited
Custom Templates Basic Full control
Multi-Channel Fallback
Stack Agnostic Firebase only Any stack
Pricing Model Pay per use Transparent tiers
Analytics Firebase Console Dedicated dashboard
Rate Limiting
Free Tier Limited quota 100 SMS monthly

When to Choose Sendmator

Backend-Heavy Apps

You have a Node/Python/PHP backend and don't want Firebase dependency

Email OTP Needed

Firebase doesn't support email OTP - you need multi-channel verification

WhatsApp OTP

Need WhatsApp verification which Firebase doesn't provide

Any Tech Stack

Works with Express, FastAPI, Laravel, Django, Rails - anything

Ready for Backend-Friendly OTP?

Works with any stack. No Firebase required. Multi-channel support included.

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No credit card required • 100 free SMS • Works with any backend