CleverPush

Installing the CleverPush plugin will automatically insert the CleverPush code into your WordPress site. It will also give you the possibility to create a notification when publishing a new post.
What is CleverPush? 
CleverPush lets you send browser push notifications to your users in the simplest way possible.
AMP Support: 
If you are using the classic / reader mode with a custom theme, please make sure your theme supports the following AMP hooks: 
* amp_post_template_body_open 
* amp_post_template_footer 
* amp_post_template_css
<h3>Configuration</h3>
Enter your CleverPush API keys in the given fields. You can find your API keys in the CleverPush backoffice under Settings > API.

CleverPush lets you send browser push notifications to your users in the simplest way possible.

scordeveloper

The NotificationButton plugin integrates your website with the NotificationButton Web Push service. It allows users to subscribe to browser notifications, enabling you to send instant updates to your visitors on desktop and mobile devices without the need for emails.
Key Features: 
* Broad Compatibility: Supports Chrome, Firefox, Edge, and Opera on both desktop and Android devices. 
* Direct Communication: Send messages directly to the user’s screen even if they are not currently browsing your website. 
* Scheduled Delivery: Set specific times and timezones for your notifications to reach your audience when they are most active. 
* Segmentation: Organize your subscribers based on location, device, or browser for more relevant communication. 
* Automated Sequences: Create notification workflows to welcome new subscribers.
To use this plugin, a NotificationButton account is required. You can manage your campaigns, view analytics, and configure advanced settings through the NotificationButton dashboard.

NotificationButton – Web Push Notifications for Websites and Online Stores

Enable automated Web Push Notifications for your website to engage visitors and provide real-time updates directly to their browsers.

CleverPush vs NotificationButton – Web Push Notifications for Websites and Online Stores