Envoyer vs tsuru: 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; tsuru: Extensible and open source Platform as a Service software. tsuru is an open source polyglot cloud application platform (PaaS). With tsuru, you don’t need to think about servers at all. You can write apps in the programming language of your choice, back it with add-on resources such as SQL and NoSQL databases, memcached, redis, and many others. You manage your app using the tsuru command-line tool and you deploy code using the Git revision control system, all running on the tsuru infrastructure.

Envoyer and tsuru 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, tsuru provides the following key features:

• Fast and secure. The entire process is really simple with no special tools needed, just a simple git push.
• Scaling in Tsuru is completely painless. Just add a unit and Tsuru will take care of everything else.
• Tsuru is built to be extensible. Through services you can provide anything your application needs.

tsuru is an open source tool with 3.14K GitHub stars and 421 GitHub forks. Here's a link to tsuru's open source repository on GitHub.