Prelude

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Prelude is a Coding & Development tool that provides an OTP & SMS verification API for developers. It offers global message delivery with competitive pricing, high deliverability, and fraud prevention.

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At a glance

Pricing

Paid · Usage-based

Free tier

API

Yes

Skill level

Technical

About

What is Prelude?

Prelude offers a robust OTP and SMS verification API designed for developers, enabling them to send verification text messages worldwide. The platform prioritizes cost-efficiency with competitive pricing and no mark-up on SMS prices, alongside exceptional deliverability through multi-routing and instant-fallback API architecture. A key differentiator is its integrated fraud prevention, blocking up to 99% of spam and fraudulent attempts before they impact billing, ensuring messages reach real users. Prelude aims to improve onboarding KPIs, reduce costs by up to 60%, and boost successful verification rates to 95%. It's built to empower exponential growth for applications requiring secure and reliable phone verification.

Best used for

Ideal for developers and startup founders who need to integrate reliable phone verification, reduce SMS costs, and prevent fraud in user authentication flows. Especially valuable for applications in fintech, social, and B2B software sectors requiring high deliverability and security for OTPs.

Common actions

implement SMS verification

prevent SMS fraud

optimize OTP delivery

integrate phone verification

Capabilities

Key features

Global SMS verification
Competitive pricing
High deliverability
Fraud prevention
Multi-routing API
Instant-fallback API
Cost reduction

Target Audience

developerstartup founder

Integrations

Not yet documented

Pricing & Plans

Paid · Usage-based

Not publicly disclosed. Check prelude.so for current pricing.

FAQs

How does Prelude ensure high SMS deliverability?

Prelude achieves high deliverability through its multi-routing and instant-fallback API architecture. This system intelligently selects the best routes for SMS messages and automatically switches to alternative routes if an issue is detected, minimizing downtime and ensuring messages reach their destination.

What kind of fraud does Prelude's API prevent?

Prelude's API is designed to prevent various types of fraud, including spam and fraudulent authentication attempts. It actively blocks up to 99% of these malicious activities before they incur costs, ensuring that your SMS budget is spent on verifying legitimate users only.

Can Prelude help reduce costs for SMS verification?

Yes, Prelude aims to significantly reduce SMS verification costs. It offers competitive pricing, optimizes authentication attempts, and provides the best prices for each country without additional mark-ups. Customers have reported up to a 60% reduction in costs.

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