Best Proactive Notification Software for Linux of 2025

OneSignal is the market leader for customer engagement. It powers mobile push and web push and in-app messages to more than 1 million developers and marketing teams. OneSignal is easy to set up and allows you to send push notifications to all your users. You can access powerful features such as segmentation, automated messaging and intelligent delivery. OneSignal is designed for developers and allows you to code in any language with any development environment. It takes less than 10 lines of code. It is also the most flexible push provider with integrations to top analytics providers and DMPs as well as Zapier to connect to 1400+ platforms and apps. OneSignal allows you to send unlimited messages to mobile subscribers and up 10K web push subscribers. 76% of top million sites that use push notifications use OneSignal (source: Builtwith).

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Amazon Simple Queue Service (SQS) is a fully managed messaging platform that facilitates the decoupling and scaling of microservices, distributed systems, and serverless applications. By streamlining the complexities and management burdens associated with traditional message-oriented middleware, SQS allows developers to concentrate on their core tasks. With SQS, it's possible to send, store, and receive messages between various software components at any scale, ensuring that no messages are lost and that other services do not need to be operational. Getting started with SQS is quick and straightforward, as users can utilize the AWS console, Command Line Interface, or their preferred SDK to execute just three simple commands. This service enables the transmission of large volumes of data with high throughput while maintaining message integrity and independence from other services. Additionally, SQS helps to decouple application components, allowing them to operate and fail separately, which ultimately enhances the system's overall fault tolerance and reliability. By leveraging SQS, your applications can achieve greater resilience and efficiency in handling messaging tasks.