prelude-verify
Prelude Verify is an onboarding and trust infrastructure product that unifies device, network, and signup signals to verify users, prevent fraud (including SMS pumping and bots), and optimize delivery across SMS, WhatsApp, RCS, Voice, and Email.
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Quick Overview
Best for: Security
What it does
Security software for decision-makers comparing workflow fit and alternatives.
Best fit
Security
Pricing snapshot
Free
Next step
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prelude-verify
Prelude Verify is part of Prelude's onboarding and trust infrastructure that unifies device, network, and signup signals into one onboarding decision. It is designed to onboard real users and block fraud before it hits your bill by exposing fraud at the hardware level and leveraging device, network, and carrier signals. The product supports multi-channel OTP verification (SMS, WhatsApp, RCS, Voice, Email) across 230+ regions and emphasizes conversion and cost-efficiency while providing enterprise compliance (SOC 2 Type II, ISO 27001, GDPR-ready).
OTP & SMS verification API for developers with anti-spam and AI-powered routing.
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Claim this listing for $29Key Features
Verify (Multi-channel OTP)
OTP verification across SMS, WhatsApp, RCS, Voice, and Email with coverage in 230+ regions and a stated 95% success rate.
Watch (Pre-KYC Risk Scoring)
Pre-KYC risk scoring that blocks fake signups before they cost you, with anomaly detection and real-time scoring.
Auth (Authentication Stack)
Full authentication stack for signup, login, social, and password flows with device binding, behavioral monitoring, and risk-based step-up.
Intel (Number Intelligence)
Number intelligence to check reachability, line type, and portability before sending messages.
Notify (Transactional Messaging)
Reliable transactional messaging built on the same rails as Verify for delivery across channels.
SMS Pumping Protection & Smart Routing
Protections against SMS pumping fraud, channel fallback, smart routing, and delivery insights to reduce cost and improve delivery rates.
Pricing
Start for Free (free tier / free credits and zero-cost testing options are mentioned)
Use Cases
Acquisition — User Verification
Onboard real users by blocking fraud at signup using device, network, and carrier signals; includes SMS pumping protection and omni-channel delivery.
Activation — Authentication
Keep sessions trusted with device binding, behavioral monitoring, and risk-based step-up to secure login and authentication flows.
Lifetime Value — Live Protection
Monitor live behavioral signals to detect abuse, trigger smarter checks, and stop fraud without adding friction using anomaly detection and real-time scoring.
Retention — Reactivation
Win back dropped users by reaching them on the right channel at the right time, with smart routing and channel fallback to minimize delivery cost.
Integrations
Node.js SDK
Official SDK example and usage shown for Node.js (client.verification.create with API token).
Go SDK
Official SDK example available for Go.
Python SDK
Official SDK example available for Python.
Kotlin/Java SDK
Official SDK example available for Kotlin/Java.
Ruby SDK
Official SDK example available for Ruby.
Benefits
Limitations
No verified limitations are available.
Frequently Asked Questions
No verified FAQs are available.
Getting Started
- 1 Step 1: Start for Free or Talk to Sales via the Prelude site.
- 2 Step 2: Obtain an API token and install/use an official SDK (examples provided for Node.js, Go, Python, Kotlin/Java, Ruby).
- 3 Step 3: Call the verification API (example: client.verification.create with target phone number) and monitor results via the dashboard.
Support
Documentation
Documentation link available on the site (Documentation).
Premium Support
Premium support includes a direct Slack connection to the team to help get started.
Sales
Talk to Sales option available on the site for onboarding and enterprise queries.
Status Page
Status Page link listed under Resources for operational visibility.
API
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