Knock

SuprSend

This company provides a notification infrastructure and unified API for product and engineering teams to manage cross-channel messaging and user preferences.

Novu

This company provides open-source notification and communication infrastructure for software developers and AI agents to reach customers across multiple digital channels via one API.

Courier

This software-as-a-service company provides a multi-channel notification platform for developers to manage and deliver messages across email, mobile and chat applications.

OneSignal

This company provides a messaging platform for businesses to send push notifications, SMS and emails to mobile and web application users.

Knapsack

This company develops a design system platform that unifies design and code for enterprise product teams to build and manage digital products.

Svix

This company provides a webhooks-as-a-service platform for software businesses to manage and send event notifications to their own customers.

Batch

This company provides a mobile-first customer engagement platform for enterprise clients to manage push notifications and marketing automation across mobile and desktop applications.

PubNub

This company provides a real-time communication platform and APIs for software developers to build chat, device control and messaging features into their applications.