Push service is an online user reintegration service that provides visitors and users of your website with valuable updates, whether or not they are in the browser. There are numerous Push notification company Currently, most of them offer paid notification services. Some companies offer free push notifications up to a certain number of participants.
The free web push notification service is powered by Truepush, the world’s most popular web push service, used by more than 25,000 brands worldwide.
You can send your first push alert by signing up for free https://app.truepush.com/home/register