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Prelude raises $20 Million Series A to build the onboarding and trust layer for the AI age

Case Study

From Twilio to Prelude: How Finfrog Reaches Its Customers at the Right Moment for 45% Less

Engineering

Build vs Buy: Navigating the Complexity of OTP Verification

Security Tips

Authentication Explained: Definition, Types and How to Choose the Right Method

OTP & Authentication

What is SMS OTP? How It Works, Benefits, Implementation & Best Practices

Case Study

Turning Matches Into Real Dates: How Breeze Improved Verification Conversion With Prelude

Compliance

Prelude is now ISO/IEC 27001 certified

Flutter SMS API

Top 10 SMS APIs for Flutter Developers (2026 Comparison)

Whatsapp OTP

The 10 best WhatsApp business solution providers in 2026

SMS Provider

10 Best International SMS Service Providers for Global Business Messaging in 2026

A2P Messaging

10 Best A2P Messaging Providers for Global Business Communication in 2026

SMS Providers

10 Best SMS Gateway Providers for Global Business Messaging in 2026

Prevent Promotion Abuse

Stopping Promo Abuse in the Age of AI: Real Examples and the Strategies That Actually Work in 2026

SMS MFA

Why SMS Still Matters in MFA: A Pragmatic Guide for Modern Authentication

RCS Providers

10 Best RCS Service Providers for Businesses in 2026

SMS Marketing

10 Best SMS Marketing Software for Businesses in 2026

SMS Marketing

SMS Marketing 101

Case Study

How Basket Scaled Verification and Saved 25% on OTP Costs with Prelude

Product Update

Prelude Expands Its Onboarding Suite with Silent Network Authentication

OTP & Authentication

What is 10DLC? A complete guide for US businesses

OTP & Authentication

Top 10 Firebase SMS OTP Alternatives (2026 Comparison)

Product Update

Prelude is Enabling WhatsApp Transactional Messages: Reliable Updates Your Users Actually Want

Email OTP

10 Best Email OTP Providers for Verification in 2026

Industry Trends

iOS 26 Brings OTP Autofill to Third Party Messaging Apps

Transactional SMS

2026 Ranking: Leading Transactional SMS Service Providers

OTP & Authentication

How to use WhatsApp OTP for login & verification (securely and at scale)?

Product Updates

Say Hello to Telegram: Prelude’s Newest Verification Channel

Case Study

How PayFit Cut MFA Costs by 35% and Switched to a Scalable Twilio Alternative

Product Updates

Introducing Preferred Channel Routing: Take Full Control of OTP Delivery

SMS API

10 Best SMS APIs for Global Messaging in 2026

OTP & Authentication

The Complete Guide to OTP Fraud: How It Works, What It Costs, and How to Stop It

Engineering

Transactional SMS: The Fastest Way to Build Trust and Drive Results (2026 Guide)

Engineering

Best Twilio Alternatives in 2026: Top Competitors Compared

Security Tips

How to identify virtual and disposable phone numbers?

OTP & Authentication

10 Best OTP Providers for Secure Authentication in 2026

Case Study

How Nymph Simplified SMS Operations by Partnering with Prelude

Engineering

How to send an SMS verification code in 2 minutes?

Case Study

Scaling user verification: How Smitten ensures every user is verified

Security Tips

What is SIM Swapping? And how to detect it before sending an SMS OTP?

Security Tips

OTP vs. Magic Links: which one should you choose for user verification?

OTP & Authentication

How to (and why) send WhatsApp OTPs?

Case Study

Why Proscai chose Prelude to elevate SMS and WhatsApp verification

Security Tips

New Account Fraud: What is it and how to prevent it?

Features

Mobile SDKs are here: Strengthen your verification flow with SDKs for iOS, Android and React Native

Security Tips

SMS Pumping Fraud: what is it and how to prevent it?

Security Tips

8 types of ecommerce fraud and how to prevent them

Security Tips

What is phone verification? A complete guide for modern apps

Security Tips

How can you understand and prevent Account Takeover (ATO) fraud?

OTP & Authentication

Best practices for OTP: How to reduce costs and secure your users?

Security Tips

Authentication vs Verification: What's the difference?

Engineering

What is a Mobile Network Operator (MNO)?

Engineering

What is an SMS API and how does it work?

Company News

We raised $8 million to transform mobile onboarding experiences

Case Study

How Sunday used OTPs to grow user engagement with Prelude

Security Tips

Credential Stuffing Attacks: What is it and how to prevent it?

Case Study

How Choose gained control over SMS verification with Prelude

Engineering

A2P Messaging: The definitive guide for businesses

Case Study

How OneSafe enabled global transaction verification in just one day with Prelude

Security Tips

How to detect and prevent fake account creation?

Engineering

RCS vs SMS: Which messaging solution is best for your business?

Engineering

SMS Delivery: The formula to reach a 99% delivery rate

Security Tips

SMS Verification: Use Cases & Best Practices

Case Study

Cubzh: Building a vibrant and authentic gaming community with Prelude

OTP & Authentication

TOTP vs HOTP: What's the difference (and which is better)?

Engineering

Prelude is now SOC 2 Type II compliant

Case Study

Why Bitstack chose Prelude to boost SMS verification deliverability

Engineering

What is International Revenue Share Fraud (IRSF)? : An Overview

Case Study

Why Startups and Developers Prefer Prelude: A Case Study With Locket

Case Study

Why Feels’ Founder Relied on Prelude to Scale Growth

Case Study

Why BeReal chose Prelude to boost conversion

Company News

Ding's becoming Prelude

Product Updates

Prelude adds Viber as an OTP Solution

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