Knock Alternatives

Amazon Simple Notification Service makes it simple and cost-effective to push to mobile devices such as iPhone, iPad, Android, Kindle Fire, and internet connected smart devices, as well as pushing to other distributed services. Besides pushing cloud notifications directly to mobile devices, SNS can also deliver notifications by SMS text message or email, to Simple Queue Service (SQS) queues, or to any HTTP endpoint.

OneSignal is a high volume push notification service for websites and mobile applications. OneSignal supports all major native and mobile platforms by providing dedicated SDKs for each platform, a RESTful server API, and a dashboard.

It is a cross-platform messaging solution that lets you reliably deliver messages at no cost. You can notify a client app that new email or other data is available to sync. You can send notification messages to drive user re-engagement and retention. For use cases such as instant messaging, a message can transfer a payload of up to 4KB to a client app.

Google Cloud Messaging (GCM) is a free service that enables developers to send messages between servers and client apps. This includes downstream messages from servers to client apps, and upstream messages from client apps to servers.

It is the centerpiece of the remote notifications feature. It is a robust, secure, and highly efficient service for app developers to propagate information to iOS (and, indirectly, watchOS), tvOS, and macOS devices.

Amazon Pinpoint makes it easy to run targeted campaigns to drive user engagement in mobile apps. Amazon Pinpoint helps you understand user behavior, define which users to target, determine which messages to send, schedule the best time to deliver the messages, and then track the results of your campaign.

We’ve built the smartest, most aware, precise, easy-to-use, scalable, secure and powerful push messaging platform on the planet. Our Push messaging platform leverages all that is unique about mobile as a channel, and that lights the spark to create meaningful and valuable mobile experiences. We help put your app in front of your users at the right time, and in the right place to drive usage and brand engagement.

Pushover is a platform for sending and receiving push notifications. On the server side, we provide an HTTP API for queueing messages to deliver to devices addressable by User or Group Keys. On the device side, our iOS, Android, and Desktop clients receive those push notifications, show them to the user, and store them for offline viewing.

Send push notifications to iOS and Android devices through one unified Push Notifications API for Google Cloud Messaging (GCM) and Apple Push Notification Service (APNS).

Tutorials, API references, and other documentation show you how to set up and send push notifications from any backend to any mobile device

PushCrew enables any website to send push notifications to their users (even when they are not on the website). A simple JavaScript code makes it working on any website in less than 2 minutes. It's a fantastic new alternative to email marketing.

Free unlimited cross platform push notifications! iOS, Android, Windows Phone, Phonegap, Unity, Marmalade, Adobe Air - we support them all! Easy integration, open-source SDK.

Automatically upgrades your outbound user notifications to use the best channel for each user. Email, mobile push, in-app, SMS, or chat — all from a single API.

Use Beamer to announce new features, your latest releases, and relevant news. Improve user engagement with a quick and easy changelog.

Push is the fastest way to get up and running with Javascript desktop notifications. A fairly new addition to the official specification, the Notification API allows modern browsers such as Chrome, Safari, and IE 9+ to push notifications to a user's desktop. Push acts as a cross-browser solution to this API, falling back to use older implementations if the user's browser does not support the new API.

It provides a unified API that makes it simple to send notifications through multiple channels, including In-App, Push, Email, SMS, and Chat. With Novu, you can create custom workflows and define conditions for each channel, ensuring that your notifications are delivered in the most effective way possible.

Web Push notifications are delivered to web browsers. Currently Apple Safari on the Mavericks operating system supports Web Push notifications. Google Chrome and Mozilla Firefox web browsers are both working on supporting push notifications and will be releasing them soon and we’ll immediately implement them into Roost so that you can send all your push notifications across any supported browser easily and quickly.

Reach all your customers on mobile or desktop. Send and manage push notification, in-app messages, or polls. Understand user behavior, retention and engagement.

It is a push notifications platform for Web and Mobile. It is very fast, GDPR compliant and full-featured. It supports all major native mobile and web platforms, provides a RESTful API and an online dashboard to design notifications and analyze their impact.

Engagespot is a notification infrastructure that helps developers build delightful multi-channel communication experiences in their products.

It is a real time and secure messaging delivery API for transactional push and in app messages. Integrate our SDK in your app and start sending data-driven transactional notifications including mobile banking, targeted e-commerce and personalized one-to-one messages.

It is a feature rich notifications library for React Native. It enables developers to rapidly build rich notifications with a simple API interface, whilst taking care of complex problems such as scheduling, background tasks, device API compatibility & more. It's compatible with both Android and iOS.

It is an API that makes your integration to Web Push API, Firebase Cloud Messaging (FCM) or Huawei Mobile Services (HMS) easier. Deliverpush infrastructure will take care about message delivery to push notification service servers.

NOTIX is an audience re-engagement service based on web and in-app push notifications that work for both desktop and mobile devices. Suitable for individual and corporate clients as well.

It’s easy to set up, and no technical skills are required. Using Their services, your website can subscribe users to receive pop-up notifications whenever they are online, regardless of what browser they are using or if they are on a mobile device.

ZeroPush provides a clean web-friendly API to APNS and GCM for mobile push notifications.

Send website notifications directly to the desktop when new content is fresh from the oven.

It allows you to send a notification to almost all of the most popular notification services available to us today such as: Telegram, Discord, Slack, Amazon SNS, Gotify, etc.

It is a customer retention and engagement application that uses web push notification to help businesses retain existing customers, boost lead generation, increase traffic, and drive sales.

A one stop shop for all notification providers with a unified and simple interface.

Re-engage customers across web and mobile with automated push notifications. Send personalized push notifications to customers even when they are not on site. Integration process takes just 3 minutes. Supported by Chrome, Opera and Firefox.

It is a web-push service for publishers. You can send and manage push-notifications and monetize your base as well. It is flexible, increases site performance and has built-in monetization.

It allows you to re-engage visitors and drive them back to your website, from anywhere on the browser. Offering both manual and automated sending, real time reports, instant delivery and powerful segmentation, it is the ideal solution to grow your website via push notifications.

It is used to show messages and notifications on your mobile device in a simple and user-friendly form. Works without third-party servers.