CPaaS (Communication Platform as a Service) is a communication platform accessible through APIs that enables developers to add channels such as SMS, email, push notifications, RCS, and Viber to applications without building their own communication infrastructure. Instead of integrating directly with multiple providers, the application uses a single platform that offers a consistent integration, authentication, and reporting model.

How Does MessageFlow Integrate with Application Backends?

MessageFlow provides both REST API and SMTP integration options. With REST API integration, every request requires Authorization and Application-Key headers. Each communication channel uses a dedicated API endpoint while following a consistent integration model. A standard implementation typically takes approximately 1–2 business days and does not require changes to the mobile application logic.

What Is an Event-Driven Architecture in the Context of Communication?

In an event-driven architecture, communication with users is triggered by system events such as registration, transactions, or order status changes. The backend publishes an event, and a dedicated communication layer (for example, MessageFlow) responds by sending the appropriate message. This approach separates business logic from communication channel logic and simplifies system maintenance.

Does MessageFlow Support OTP and Two-Factor Authentication?

Yes. MessageFlow supports OTP delivery through SMS, email, and push notifications with priority message processing. MessageFlow Priority ensures that OTP messages bypass marketing traffic queues, minimizing delays and improving the user experience during login and transaction authorization processes.

How Do Delivery Statuses Work in MessageFlow?

Each channel has its own delivery status model. SMS reports four DLR statuses: DELIVERED, UNDELIVERED, REJECTED, and EXPIRED. Email reports seven statuses, ranging from injected and ok to hardbounce and dropped. Push notifications report multiple statuses, including user interaction types such as clicks, dismissals, and swipes. Status updates can be received through webhooks in real time or retrieved through dedicated API endpoints.

Does MessageFlow Integration Require Changes to Mobile Application Architecture?

No. The mobile application continues to communicate exclusively with its own backend, just as before. Integration with MessageFlow takes place entirely at the backend level. The backend sends a single HTTPS request to the MessageFlow API (or uses SMTP) in response to a system event. No changes are required on the client side (iOS or Android application).

Which CPaaS Should Enterprise Organizations Choose?

When selecting a CPaaS solution for enterprise environments, it is worth evaluating supported communication channels, integration methods (REST API and SMTP), SLA commitments, global reach, DLR reporting, ISO 27001, ISO 27018, and ISO 22301 certifications, NIS2 and DORA compliance, data residency within the EEA, access control mechanisms (RBAC, 2FA, IP Whitelisting), and compliance documentation. MessageFlow meets these requirements and has been validated through independent ICT audits.

What Is the Difference Between CPaaS and UCaaS?

CPaaS is a developer-focused, API-first solution. It enables organizations to embed communication channels such as SMS, email, push notifications, RCS, and Viber directly into applications and backend processes. UCaaS (Unified Communications as a Service) provides ready-to-use communication tools for end users, such as video conferencing, team chat, and business telephony. CPaaS requires integration with an application, whereas UCaaS is typically deployed as a ready-made product for internal teams.

CPaaSMessageFlow Blog

CPaaS Cross-channel

12 min June 12, 2026

How Does MessageFlow Fit into Mobile Application Architecture? CPaaS and Event-Driven Communication in Practice

TL;DR: MessageFlow is a CPaaS (Communication Platform as a Service) that enables mobile applications to add SMS, email, push notifications, RCS, and OTT messaging...

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