# Introduction

Using [Rule Engine](https://docs.widgelix.com/get-started/rule-engine) on **Widgelix** you can send notifications using **Email**, **SMS**, **Slack** and **Discord**

* [Slack](https://docs.widgelix.com/notifications/types/slack)
* [Email](https://docs.widgelix.com/notifications/types/email)
* [SMS](https://docs.widgelix.com/notifications/types/sms)
* [Discord](https://docs.widgelix.com/notifications/types/discord)