Prelude

What Prelude does

Prelude provides a trust infrastructure for the AI age, offering a single platform for developers to verify users, prevent fraud, manage authentication sessions, and understand who they are interacting with. It unifies device, network, and signup signals into one onboarding decision, aiming to build trust while protecting conversion and cost efficiency. The platform helps companies onboard faster, convert more, and reduce fraud. Prelude offers a holistic suite of five products built to work together, including OTP verification, pre-KYC risk scoring, a full authentication stack, number intelligence, and reliable transactional messaging. It supports 230 regions with over 30 providers and 7 channels, ensuring high successful verification rates and significant fraud reduction.

Products

• User VerificationOnboard real users by using device, network, and carrier signals to block fraud before it incurs costs. Includes SMS Pumping Protection and Omni-Channel support worldwide.
• AuthenticationMaintain trusted sessions with device binding, behavioral monitoring, and risk-based verification. Supports signup, login, social, and password authentication in one API.
• Live ProtectionMonitor live behavioral signals to detect abuse, trigger smarter checks, and stop fraud without adding friction. Includes Anomaly Detection, Real-Time Scoring, and Soft KYC.
• ReactivationRe-engage dropped users by reaching them on the right channel at the right time for the lowest delivery cost. Features Smart Routing, Channel Fallback, and Delivery Insights.
• SMS APIA high-performance API to send, receive, and track SMS messages in real time. Automates communications like notifications, alerts, authentication codes, and marketing campaigns. Offers global capabilities, instant delivery, and status insights.
• Transactional SMS APIA solution for sending automated messages, OTPs, and customer notifications in real time. Designed for informative, real-time, and service-oriented messages like order confirmations, verification codes, payment notifications, and appointment reminders.

Key capabilities

• Unified device, network, and signup signals
• Onboarding decision engine
• User verification
• SMS Pumping Protection
• Omni-Channel support
• Live protection with behavioral signals
• Anomaly Detection
• Real-Time Scoring
• Soft KYC
• Authentication with device binding
• Risk-Based Step-Up verification
• Reactivation with Smart Routing
• Channel Fallback
• Delivery Insights
• OTP verification across SMS, WhatsApp, RCS, Voice, and Email
• Pre-KYC risk scoring
• Full authentication stack (signup, login, social, password)
• Number intelligence (reachability, line type, portability check)
• Reliable transactional messaging
• Familiar Endpoint Structure for API calls
• Intuitive Dashboard for OTP routing, message text, and delivery insights
• Zero-Cost Testing Options
• Premium Support with direct Slack connection
• Global SMS capabilities (230+ countries)
• Instant SMS Delivery
• Live Delivery Reports (DLRs)
• Smart Campaign Management
• Advanced API Security (API keys, token-based access, GDPR compliance)
• Cloud-Powered Performance
• Automated SMS notifications, alerts, authentication codes, marketing campaigns
• Secure authentication (OTP / 2FA)
• Automated message delivery via API
• Dynamic fields for personalization in transactional SMS
• Tracking and analytics for transactional SMS
• API Dispatch for single or bulk messages
• Adaptive Routing by region and carrier
• Automated language and encoding management
• Clear documentation and SDKs

Use cases

• User verification during acquisition
• Blocking fraud before it hits the bill
• Protecting against SMS pumping fraud
• Maintaining trusted user sessions
• Detecting abuse through live behavioral monitoring
• Stopping fraud without adding friction
• Winning back dropped users
• Sending OTP verification codes
• Pre-KYC risk assessment for new signups
• Full authentication for signup, login, social, and password
• Checking number reachability and type before sending messages
• Sending reliable transactional messages
• Automating notifications (order confirmations, delivery updates)
• Automating alerts
• Automating authentication codes
• Automating marketing campaigns
• Secure authentication (OTP / 2FA)
• Identity verification and login validation
• Personalized promotional and loyalty messages
• Order delivery confirmation
• Payment notification or security alert
• Appointment reminders
• Availability alerts
• Enhancing customer experience and engagement

AI approach

Prelude uses AI/ML for anomaly detection and real-time scoring to detect abuse and stop fraud without adding friction. It unifies device, network, and signup signals into one onboarding decision, helping to build trust while protecting conversion and cost efficiency. The company mentions "AI agents" in its funding announcement.

Tech named: AI agents, Anomaly Detection, Real-Time Scoring

Industries served

• Consumer app
• Fintech
• Mobility
• Dating
• B2B software
• Food Tech
• Banking
• E-Commerce
• Healthcare
• HR
• SaaS
• IT

What it says sets it apart

• Unifies device, network, and signup signals into one onboarding decision
• High successful verification rate (95%)
• Significant fraud reduction (99%)
• Cost reduction (30%) compared to previous providers
• Supports 230 regions with 30+ providers and 7 channels
• Holistic suite of five integrated products on one platform
• SOC 2 Type II certified
• ISO 27001 certified
• GDPR-ready
• Built in Europe
• Pricing that drops as usage grows
• Pay-as-you-go pricing with no hidden fees or setup costs
• High performance SMS API (98%+ deliverability via direct operator routes)
• Clear documentation and SDKs for rapid integration
• Intuitive dashboard for control and monitoring
• Unlimited scalability with REST API and HTTPS protocols
• Expert local support via Slack
• Reliable, European-hosted SMS solution
• Instant message delivery (average under 3 seconds) for transactional SMS
• Delivery rate above 98% for transactional SMS
• Secure integration and compliant infrastructure for transactional SMS
• Stable, fully documented, and secure SMS API compliant with GDPR and U.S. data-protection standards
• Guaranteed performance through direct carrier connections
• Responsive human support with fast response times
• Secure infrastructure hosted in certified data centers with 99.95% SLA

Funding rounds we track

From the AI funding tracker — rounds as reported by the linked publications.