# Introduction
# What Is Envoyer?
Laravel Envoyer is a zero downtime deployment service for PHP. Some highlights of Envoyer's features include:
- GitHub, GitLab & Bitbucket Integration
- GitLab Self-Hosted Integration
- Seamless Deployment Rollbacks
- Application Health Checks
- Integrated Chat Notifications
- Tuned for Laravel Apps
- Deploy Any PHP Project
- Unlimited Deployments
- Deploy To Multiple Servers
- Cron Job Monitoring
- Unlimited Team Members
- Customize Your Deployments
- Import Your Laravel Forge Servers
# Learning More
Laracasts has a comprehensive and free video course on Envoyer. Feel free to review this course if you are new to Laravel Envoyer and want a video overview of its features.
# Envoyer IP Addresses
If you are restricting SSH access to your server using IP whitelisting, you must whitelist the following IP addresses:
159.65.47.205157.245.120.132134.122.14.47
You may also need to whitelist the Heartbeat IP addresses.
# Envoyer API
Envoyer provides a powerful API that allows you to manage your servers programatically, providing access to the vast majority of Envoyer features. You can find the Envoyer API documentation here.
# Found Something Wrong?
If you find something in the documentation that is misleading or outright wrong, please consider submitting a pull request on GitHub.