Phone verification for exponential growth
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.
Risk-wise, business-wise, cost-wise: start with Prelude if you need SMS sending into your application. Their pricing, routing and analytics are game changers compared to the rest of the market.
BeReal
Time is an opportunity cost for us so we move really fast. We like to partner with companies who are in the same boat. Prelude is easy to use, the API is great, the dashboard is nice and I can see reports.
Locket
The service works well, the company is really professional, and it does the work of aggregating the best traffic for you, so you don’t have to bother with that.
Prelude offers an optimal combination of delivery success and cost-efficiency, which is crucial for us as we scale up. The team is approachable, understands our needs, and the product delivers on its promise.
Bitstack
Risk-wise, business-wise, cost-wise: start with Prelude if you need SMS sending into your application. Their pricing, routing and analytics are game changers compared to the rest of the market.
BeReal
Time is an opportunity cost for us so we move really fast. We like to partner with companies who are in the same boat. Prelude is easy to use, the API is great, the dashboard is nice and I can see reports.
Locket
The service works well, the company is really professional, and it does the work of aggregating the best traffic for you, so you don’t have to bother with that.
Prelude offers an optimal combination of delivery success and cost-efficiency, which is crucial for us as we scale up. The team is approachable, understands our needs, and the product delivers on its promise.
Bitstack
Risk-wise, business-wise, cost-wise: start with Prelude if you need SMS sending into your application. Their pricing, routing and analytics are game changers compared to the rest of the market.
BeReal
Time is an opportunity cost for us so we move really fast. We like to partner with companies who are in the same boat. Prelude is easy to use, the API is great, the dashboard is nice and I can see reports.
Locket
The service works well, the company is really professional, and it does the work of aggregating the best traffic for you, so you don’t have to bother with that.
Prelude offers an optimal combination of delivery success and cost-efficiency, which is crucial for us as we scale up. The team is approachable, understands our needs, and the product delivers on its promise.
Bitstack
Risk-wise, business-wise, cost-wise: start with Prelude if you need SMS sending into your application. Their pricing, routing and analytics are game changers compared to the rest of the market.
BeReal
Time is an opportunity cost for us so we move really fast. We like to partner with companies who are in the same boat. Prelude is easy to use, the API is great, the dashboard is nice and I can see reports.
Locket
The service works well, the company is really professional, and it does the work of aggregating the best traffic for you, so you don’t have to bother with that.
Prelude offers an optimal combination of delivery success and cost-efficiency, which is crucial for us as we scale up. The team is approachable, understands our needs, and the product delivers on its promise.
Bitstack
Risk-wise, business-wise, cost-wise: start with Prelude if you need SMS sending into your application. Their pricing, routing and analytics are game changers compared to the rest of the market.
BeReal
Time is an opportunity cost for us so we move really fast. We like to partner with companies who are in the same boat. Prelude is easy to use, the API is great, the dashboard is nice and I can see reports.
Locket
The service works well, the company is really professional, and it does the work of aggregating the best traffic for you, so you don’t have to bother with that.
Prelude offers an optimal combination of delivery success and cost-efficiency, which is crucial for us as we scale up. The team is approachable, understands our needs, and the product delivers on its promise.
Bitstack
Risk-wise, business-wise, cost-wise: start with Prelude if you need SMS sending into your application. Their pricing, routing and analytics are game changers compared to the rest of the market.
BeReal
Time is an opportunity cost for us so we move really fast. We like to partner with companies who are in the same boat. Prelude is easy to use, the API is great, the dashboard is nice and I can see reports.
Locket
The service works well, the company is really professional, and it does the work of aggregating the best traffic for you, so you don’t have to bother with that.
Prelude offers an optimal combination of delivery success and cost-efficiency, which is crucial for us as we scale up. The team is approachable, understands our needs, and the product delivers on its promise.
Bitstack
Risk-wise, business-wise, cost-wise: start with Prelude if you need SMS sending into your application. Their pricing, routing and analytics are game changers compared to the rest of the market.
BeReal
Time is an opportunity cost for us so we move really fast. We like to partner with companies who are in the same boat. Prelude is easy to use, the API is great, the dashboard is nice and I can see reports.
Locket
The service works well, the company is really professional, and it does the work of aggregating the best traffic for you, so you don’t have to bother with that.
Prelude offers an optimal combination of delivery success and cost-efficiency, which is crucial for us as we scale up. The team is approachable, understands our needs, and the product delivers on its promise.
Bitstack
Risk-wise, business-wise, cost-wise: start with Prelude if you need SMS sending into your application. Their pricing, routing and analytics are game changers compared to the rest of the market.
BeReal
Time is an opportunity cost for us so we move really fast. We like to partner with companies who are in the same boat. Prelude is easy to use, the API is great, the dashboard is nice and I can see reports.
Locket
The service works well, the company is really professional, and it does the work of aggregating the best traffic for you, so you don’t have to bother with that.
Prelude offers an optimal combination of delivery success and cost-efficiency, which is crucial for us as we scale up. The team is approachable, understands our needs, and the product delivers on its promise.
Bitstack
Risk-wise, business-wise, cost-wise: start with Prelude if you need SMS sending into your application. Their pricing, routing and analytics are game changers compared to the rest of the market.
BeReal
Time is an opportunity cost for us so we move really fast. We like to partner with companies who are in the same boat. Prelude is easy to use, the API is great, the dashboard is nice and I can see reports.
Locket
The service works well, the company is really professional, and it does the work of aggregating the best traffic for you, so you don’t have to bother with that.
Prelude offers an optimal combination of delivery success and cost-efficiency, which is crucial for us as we scale up. The team is approachable, understands our needs, and the product delivers on its promise.
Bitstack
Risk-wise, business-wise, cost-wise: start with Prelude if you need SMS sending into your application. Their pricing, routing and analytics are game changers compared to the rest of the market.
BeReal
Time is an opportunity cost for us so we move really fast. We like to partner with companies who are in the same boat. Prelude is easy to use, the API is great, the dashboard is nice and I can see reports.
Locket
The service works well, the company is really professional, and it does the work of aggregating the best traffic for you, so you don’t have to bother with that.
Prelude offers an optimal combination of delivery success and cost-efficiency, which is crucial for us as we scale up. The team is approachable, understands our needs, and the product delivers on its promise.
Bitstack
Risk-wise, business-wise, cost-wise: start with Prelude if you need SMS sending into your application. Their pricing, routing and analytics are game changers compared to the rest of the market.
BeReal
Time is an opportunity cost for us so we move really fast. We like to partner with companies who are in the same boat. Prelude is easy to use, the API is great, the dashboard is nice and I can see reports.
Locket
The service works well, the company is really professional, and it does the work of aggregating the best traffic for you, so you don’t have to bother with that.
Prelude offers an optimal combination of delivery success and cost-efficiency, which is crucial for us as we scale up. The team is approachable, understands our needs, and the product delivers on its promise.
Bitstack
Risk-wise, business-wise, cost-wise: start with Prelude if you need SMS sending into your application. Their pricing, routing and analytics are game changers compared to the rest of the market.
BeReal
Time is an opportunity cost for us so we move really fast. We like to partner with companies who are in the same boat. Prelude is easy to use, the API is great, the dashboard is nice and I can see reports.
Locket
The service works well, the company is really professional, and it does the work of aggregating the best traffic for you, so you don’t have to bother with that.
Prelude offers an optimal combination of delivery success and cost-efficiency, which is crucial for us as we scale up. The team is approachable, understands our needs, and the product delivers on its promise.
Bitstack
Risk-wise, business-wise, cost-wise: start with Prelude if you need SMS sending into your application. Their pricing, routing and analytics are game changers compared to the rest of the market.
BeReal
Time is an opportunity cost for us so we move really fast. We like to partner with companies who are in the same boat. Prelude is easy to use, the API is great, the dashboard is nice and I can see reports.
Locket
The service works well, the company is really professional, and it does the work of aggregating the best traffic for you, so you don’t have to bother with that.
Prelude offers an optimal combination of delivery success and cost-efficiency, which is crucial for us as we scale up. The team is approachable, understands our needs, and the product delivers on its promise.
Bitstack
Risk-wise, business-wise, cost-wise: start with Prelude if you need SMS sending into your application. Their pricing, routing and analytics are game changers compared to the rest of the market.
BeReal
Time is an opportunity cost for us so we move really fast. We like to partner with companies who are in the same boat. Prelude is easy to use, the API is great, the dashboard is nice and I can see reports.
Locket
The service works well, the company is really professional, and it does the work of aggregating the best traffic for you, so you don’t have to bother with that.
Prelude offers an optimal combination of delivery success and cost-efficiency, which is crucial for us as we scale up. The team is approachable, understands our needs, and the product delivers on its promise.
Bitstack
Risk-wise, business-wise, cost-wise: start with Prelude if you need SMS sending into your application. Their pricing, routing and analytics are game changers compared to the rest of the market.
BeReal
Time is an opportunity cost for us so we move really fast. We like to partner with companies who are in the same boat. Prelude is easy to use, the API is great, the dashboard is nice and I can see reports.
Locket
The service works well, the company is really professional, and it does the work of aggregating the best traffic for you, so you don’t have to bother with that.
Prelude offers an optimal combination of delivery success and cost-efficiency, which is crucial for us as we scale up. The team is approachable, understands our needs, and the product delivers on its promise.
Bitstack
Risk-wise, business-wise, cost-wise: start with Prelude if you need SMS sending into your application. Their pricing, routing and analytics are game changers compared to the rest of the market.
BeReal
Time is an opportunity cost for us so we move really fast. We like to partner with companies who are in the same boat. Prelude is easy to use, the API is great, the dashboard is nice and I can see reports.
Locket
The service works well, the company is really professional, and it does the work of aggregating the best traffic for you, so you don’t have to bother with that.
Prelude offers an optimal combination of delivery success and cost-efficiency, which is crucial for us as we scale up. The team is approachable, understands our needs, and the product delivers on its promise.
Bitstack
Risk-wise, business-wise, cost-wise: start with Prelude if you need SMS sending into your application. Their pricing, routing and analytics are game changers compared to the rest of the market.
BeReal
Time is an opportunity cost for us so we move really fast. We like to partner with companies who are in the same boat. Prelude is easy to use, the API is great, the dashboard is nice and I can see reports.
Locket
The service works well, the company is really professional, and it does the work of aggregating the best traffic for you, so you don’t have to bother with that.
Prelude offers an optimal combination of delivery success and cost-efficiency, which is crucial for us as we scale up. The team is approachable, understands our needs, and the product delivers on its promise.
Bitstack
Risk-wise, business-wise, cost-wise: start with Prelude if you need SMS sending into your application. Their pricing, routing and analytics are game changers compared to the rest of the market.
BeReal
Time is an opportunity cost for us so we move really fast. We like to partner with companies who are in the same boat. Prelude is easy to use, the API is great, the dashboard is nice and I can see reports.
Locket
The service works well, the company is really professional, and it does the work of aggregating the best traffic for you, so you don’t have to bother with that.
Prelude offers an optimal combination of delivery success and cost-efficiency, which is crucial for us as we scale up. The team is approachable, understands our needs, and the product delivers on its promise.
Bitstack
Risk-wise, business-wise, cost-wise: start with Prelude if you need SMS sending into your application. Their pricing, routing and analytics are game changers compared to the rest of the market.
BeReal
Time is an opportunity cost for us so we move really fast. We like to partner with companies who are in the same boat. Prelude is easy to use, the API is great, the dashboard is nice and I can see reports.
Locket
The service works well, the company is really professional, and it does the work of aggregating the best traffic for you, so you don’t have to bother with that.
Prelude offers an optimal combination of delivery success and cost-efficiency, which is crucial for us as we scale up. The team is approachable, understands our needs, and the product delivers on its promise.
Bitstack
Risk-wise, business-wise, cost-wise: start with Prelude if you need SMS sending into your application. Their pricing, routing and analytics are game changers compared to the rest of the market.
BeReal
Time is an opportunity cost for us so we move really fast. We like to partner with companies who are in the same boat. Prelude is easy to use, the API is great, the dashboard is nice and I can see reports.
Locket
The service works well, the company is really professional, and it does the work of aggregating the best traffic for you, so you don’t have to bother with that.
Prelude offers an optimal combination of delivery success and cost-efficiency, which is crucial for us as we scale up. The team is approachable, understands our needs, and the product delivers on its promise.
Bitstack
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
Unmatched deliverability and no downtime, with our multi-routing and instant-fallback API.
More Users
95%
Successful verification
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.
No Spam
99%
Fraud blocked
30% of your user authentication budget is wasted on spam and fraud. Our API prevent fraud before it impacts your bill.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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 best route at the lower cost, leveraging our accumulated traffic volume to negotiate the best prices on your behalf.
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
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+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.
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.
Multi routing
Multi routing
Multi routing
Gain deep insights with real-time analytics
Gain deep insights with real-time analytics
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.
Actionable
Actionable
Actionable
Identify issues, optimize delivery, and enhance verification.
Access intuitive visualizations and data to make informed decisions quickly.
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.
Swift
Swift
Swift
Eeeeeasy to
implement
Move to Prelude in under a sprint with our minimalist API and multi-language SDKs.
Human
Human
Human
Dedicated customer support
Get premium support via Slack or email —free and fully dedicated to you.
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.
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>"}}'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>"}}'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>"}}'