AWS User Notifications
AWS User Notifications lets you configure and view alerts from various AWS services. It centralizes how you monitor your infrastructure, letting you set up specific notification rules directly within the AWS management console without needing third-party integrations for basic alerting needs.
This fits teams already deep in the AWS ecosystem who want native visibility. However, there is no free tier available, so you will pay based on usage. Since it operates on a pay-as-you-go model, you should keep an eye on notification volume to manage costs effectively.