Envoyer vs Flynn: What are the differences?

Envoyer: A brand new way to deploy PHP and Laravel applications with zero downtime. Envoyer deploys your PHP applications with zero downtime. Just push your code, and let Envoyer deliver your application to one or many servers without interrupting a single customer. In this series, we'll discuss each feature of Envoyer, demonstrating how to use them with a sample project; Flynn: Next generation open source platform as a service. Flynn lets you deploy apps with git push and containers. Developers can deploy any app to any cluster in seconds.

Envoyer and Flynn can be primarily classified as "Platform as a Service" tools.

Some of the features offered by Envoyer are:

• GitHub / Bitbucket Integration
• Seamless Deployment Rollbacks
• Deploy To Multiple Servers

On the other hand, Flynn provides the following key features:

• Flynn goes beyond 12 factor apps. Run any Linux process written in any language or framework, even stateful apps on your own servers or any public cloud.
• Scaling or adding a new cluster is simple: just add more nodes. Everything is containerized, Flynn takes care of distributing work across the cluster.
• Flynn is 100% free and open source. Flynn works great out of the box, and since Flynn is modular and API-driven it's easy to modify and swap components to suit your needs.

Flynn is an open source tool with 7.24K GitHub stars and 534 GitHub forks. Here's a link to Flynn's open source repository on GitHub.