No need to answer
The number is the code
Flash Call
We call your customer. The last 4 or 6 digits of the incoming phone number become their verification code.
+• ••• ••• 4 8 2 6
Phone verification, reimaginedWhy send a text
when a call
does the job?
Verify your customers with a phone call.
Spend less on verification, from first sign-up
to the next password reset.
Built for businesses in the US, EU and UK
No SMS required3 verification methodsFor websites & apps
One call. One verified number.Interactive demo
Phone verification Your customerYour app ✓
Your app ✓Browser demo only. No real calls are made.
The same familiar flow.
A smarter way to verify.
How it works
Three ways to say,
“Yes, that’s my number.”
Your customer enters their phone number.
OTPCall verifies it and sends the result
back to your application.
No code to enter
One call from your customer
Reverse Call
We display a number to call. Your customer dials it, and we check that the call comes from the number they provided.
Call to verify
In their chosen language
A code they can hear
Voice OTP
We call and read out a 6-digit code in the selected language. Your customer listens and enters the code in your form.
“Your code is: four, eight…”
Make every verification count
Grow your business.
Not your SMS bill.
Compare costs for the same number of verifications. Enter your rates and see what a different approach could save.
1,000500,000
Illustrative rates, not a pricing offer. Actual pricing depends on country, verification method and volume.
Integration
Your interface.
Our calls.
Keep customers on your website or in your app. Let OTPCall handle phone verification.
- 1
Connect your project
Request access for your project. Once connected, send the customer’s phone number and your chosen verification method from your server.
- 2
Guide your customer
Display a code field or a number to call, right inside your existing interface.
- 3
Get the verification result
Check the result on your server, then continue the sign-up or login flow.
The verification flowOTPCall
Your app
Phone number + verification method→
☎ Verification call
Customer code / incoming call→
←Number verified ✓
Keep secret keys and authorization decisions on your server.
Questions, answered
Before your
first call.
Do customers need to install an app?
No. They just need access to the phone number they provide. They receive a call or dial the number shown, while the verification flow stays on your website or in your app.
Do customers need to answer a Flash Call?
No. The last 4 or 6 digits of the incoming phone number are the code. The customer enters those digits in your form, and your server sends the code to OTPCall for verification.
Is a Reverse Call always free for the customer?
Reverse Call uses a toll-free number where available in the customer’s country. Availability and calling conditions need to be confirmed for each country and carrier before launch.
Which verification method should I choose?
Flash Call verifies a number using the last digits of an incoming caller ID. Reverse Call removes the need to type a code. Voice OTP reads a code in the selected language and costs more because it includes an outbound voice call.
What countries, languages and rates are available?
OTPCall focuses on the United States, European Union and United Kingdom. Country and carrier coverage, voice languages and pricing are confirmed for your project. Share your target countries, expected monthly volume and preferred methods to get a tailored estimate.
What does OTPCall actually verify?
Verification confirms access to the supplied phone number at that moment. Your application decides whether that is sufficient for sign-up, account recovery or a second factor, and enforces its own attempt limits.
Start with your numbers
What does “It’s me”
cost your business?
Explore call verification for the US, EU and UK.
Send a request to get your project started.
Create an account Tell us about your project.
We’ll help you get connected.
We’ll help you get connected.