OneSignal

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.

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.

SuprSend

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

Airship

This company develops a mobile customer engagement platform for enterprise brands to manage push notifications, messaging and automated marketing across multiple digital channels.

SendGrid

This company provides a cloud-based email delivery platform for businesses to send transactional and marketing messages to their customers.

Knock

This company provides notification infrastructure and APIs to help product teams deliver and manage cross-channel messaging for their users.

Omnisend

This company provides email and SMS marketing automation software for ecommerce businesses to manage customer communications and campaigns.

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.