The most affordable OTP verification API for startups and developers. Email OTP at $0.0025, SMS at $0.015, WhatsApp at $0.006. Save 70% compared to Twilio Verify and other expensive alternatives.
Low prices without cutting corners on quality or reliability
We partner directly with carriers and infrastructure providers (Amazon SES, Twilio, Meta WhatsApp) without middleman markup. We pass those savings directly to you.
Built by developers for developers. No enterprise sales teams, no expensive offices. Just great infrastructure and honest pricing.
As we scale, we negotiate better rates with providers. Unlike competitors who pocket the difference, we lower prices for everyone.
No monthly fees, no per-user charges, no feature paywalls. You only pay for successful verifications. If it doesn't deliver, you don't pay.
See how much you'll save by switching to the cheapest OTP API
Use email OTP instead of SMS and save even more:
Everything you need for secure OTP verification
Email, SMS, WhatsApp verification from one API. Automatic fallback between channels.
Send OTPs to 200+ countries. Competitive pricing for all regions, not just US.
Rate limiting, IP blocking, and pattern detection included at no extra cost.
99.9% deliverability. Most OTPs arrive in under 5 seconds worldwide.
RESTful API with SDKs for Node.js, Python, PHP, Go. Integrate in 10 minutes.
Track delivery rates, conversion rates, and costs per channel in dashboard.
Just 2 API calls to send and verify OTPs
// Send OTP (Email, SMS, or WhatsApp)
const response = await fetch(
'https://api.sendmator.com/v1/otp/generate',
{
method: 'POST',
headers: {
'Authorization': 'Bearer YOUR_API_KEY',
'Content-Type': 'application/json'
},
body: JSON.stringify({
identifier: '+1234567890',
channel: 'sms' // or 'email', 'whatsapp'
})
}
);
const { session_id } = await response.json();// Verify the code user entered
const verify = await fetch(
'https://api.sendmator.com/v1/otp/verify',
{
method: 'POST',
headers: {
'Authorization': 'Bearer YOUR_API_KEY',
'Content-Type': 'application/json'
},
body: JSON.stringify({
session_id: session_id,
code: userCode
})
}
);
const { verified } = await verify.json();Free credits to start. No credit card required. No monthly fees. Cancel anytime.
Join thousands of developers who switched to save money