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Phone verification for exponential growth

Phone verification for exponential growth

Send verification messages anywhere in the world with the best prices, top deliverability, and zero spam with Prelude—the SMS API empowering your growth.

Send verification messages anywhere in the world with the best prices, top deliverability, and zero spam with Prelude—the SMS API empowering your growth.

Results Driven

Results Driven

Results Driven

Improve your onboarding KPIs

Improve your onboarding KPIs

Improve your onboarding KPIs

Lower Costs

60%

Costs reduction

Less attempts by authentication, the best price for each countries and no mark-up on SMS prices: Prelude helps you save costs.

Lower Costs

60%

Costs reduction

Less attempts by authentication, the best price for each countries and no mark-up on SMS prices: Prelude helps you save costs.

More Users

95%

Successful verification

Boost your OTP conversions worldwide with unmatched deliverability and no downtime, with our multi-routing and instant-fallback API.

More Users

95%

Successful verification

Boost your OTP conversions worldwide with unmatched deliverability and no downtime, with our multi-routing and instant-fallback API.

No Spam

99%

Fraud blocked

40% of your user authentication budget is wasted on spam and fraud. Our API prevent fraud before it impacts your bill, so you can send SMS to real users only.

No Spam

99%

Fraud blocked

40% of your user authentication budget is wasted on spam and fraud. Our API prevent fraud before it impacts your bill, so you can send SMS to real users only.

Multi routing

Multi routing

Multi routing

Deliver on auto-pilot in 230 countries, on 5 channels

Deliver on auto-pilot in 230 countries, on 5 channels

Prelude connects you to 30+ providers.

We automatically determine the the best route at the lower cost, leveraging our accumulated traffic volume to negotiate the best prices on your behalf.

instant fallback with prelude anti fraud api
instant fallback with prelude anti fraud api
instant fallback with prelude anti fraud api

Fallback automatically on the next best route.

If one way is blocked, we find another one to ensure your message is delivered and that your user converts.

Leverage the best channels
for each country

We use the best channels per country: WhatsApp in Brazil, Viber in Ukraine, Zalo in Vietnam, with SMS as a fallback everywhere

five different messaging channels for otp
five different messaging channels for otp
five different messaging channels for otp

+1

+55

+86

+45

+233

+49

+30

+852

+62

+1

+81

+52

+972

+33

+64

+54

+12

+34

+943

+47

+33

+1

+55

+86

+45

+233

+49

+30

+852

+62

+964

+81

+52

+972

+64

+1

+12

+34

+943

+1

Anti Fraud

Anti Fraud

Anti Fraud

The most effective protection against fraud

The most effective protection against fraud

Intelligent

Intelligent

Intelligent

Four layers of protection and AI models to identify spam

Protect your users and budget with Prelude, which prevents fraud with the utmost precision.

anti fraud and irsf protection with prelude
anti fraud and irsf protection with prelude

Granular

Granular

Granular

Onboard only genuine users even in high-risk regions

Our granular approach enables you to keep growing, even in countries that are significantly affected by fraudulent traffic.

granular fraud verification
granular fraud verification

Multi routing

Multi routing

Multi routing

Gain deep insights with real-time analytics

Gain deep insights with real-time analytics

prelude dashboard
prelude dashboard
prelude dashboard

Transparent

Transparent

Transparent

Track the metrics that matter the most to you in real-time.

Conversion rate, average price or time to convert, get the most transparent data on your verification.

conversion metrics tracking
conversion metrics tracking
conversion metrics tracking

Actionable

Actionable

Actionable

Identify issues, optimize delivery, and enhance verification.

Access intuitive visualizations and data to make informed decisions quickly.

strategic trade off and price optimization for otps
strategic trade off and price optimization for otps
strategic trade off and price optimization for otps

More reasons to choose Prelude API

More reasons to choose Prelude API

Automated

Automated

Automated

No more registration pain

Prelude is globally registered, ready for OTPs with pre-approved, conversion-optimized templates.

letter of authorization
letter of authorization

Swift

Swift

Swift

Eeeeeasy to
implement

Move to Prelude in under a sprint with our minimalist API and multi-language SDKs.

two endpoints easy to implement
two endpoints easy to implement

Human

Human

Human

Dedicated customer support

Get premium support via Slack or email —free and fully dedicated to you.

connect with support on slack
connect with support on slack

Team player

Team player

Team player

Built for developers, trusted by founders

C-Levels

Protect company data and user info. Ensure only real users access platform, boosting security and trust. Cut user authentication costs.

Developers

Integrate swiftly with our well-documented API, saving time and effort. Rely on our robust infrastructure to manage high volumes and peak loads seamlessly. Use detailed reports to identify issues and enhance delivery rates.

Heads of Dept.

Ensure a smooth user experience with fast, reliable verifications. Reduce your product team's workload. Use real-time data to monitor performance and optimize verification processes.

Startups

Integrate fast with minimal setup time for growth. Begin small and scale easily. Save on SMS authentication costs with transparent pricing from Prelude.

Scale-ups

Adapt to growing verification needs in terms of volume and markets. Protect users with top-tier security, building trust and confidence. Use detailed insights to optimize verification and drive informed expansion decisions.

Enterprises

Handle high-volume verifications with unmatched speed and reliability. Get tailored solutions for complex needs and dedicated premium support to ensure seamless operations.

Easy to setup

Easy to setup

Easy to setup

Start right away

2 simple endpoints that handle 1000+ routes

Whatever language you use, we got you covered.

Go langugage
json
json
curl -s 'https://api.prelude.dev/v2/verification' \
  --header 'Authorization: Bearer <YOUR_TOKEN>' \
  --header 'Content-Type: application/json' \
  --data '{"target":{"type":"phone_number","value":"<YOUR_PHONE_NUMBER>"}}'
Go langugage
json
json
curl -s 'https://api.prelude.dev/v2/verification' \
  --header 'Authorization: Bearer <YOUR_TOKEN>' \
  --header 'Content-Type: application/json' \
  --data '{"target":{"type":"phone_number","value":"<YOUR_PHONE_NUMBER>"}}'
Go langugage
json
json
curl -s 'https://api.prelude.dev/v2/verification' \
  --header 'Authorization: Bearer <YOUR_TOKEN>' \
  --header 'Content-Type: application/json' \
  --data '{"target":{"type":"phone_number","value":"<YOUR_PHONE_NUMBER>"}}'