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Passenger

1.4K
262
+ 1
199
Unicorn

485
354
+ 1
294
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Passenger vs Unicorn: What are the differences?

Developers describe Passenger as "A fast and robust web server and application server for Ruby, Python and Node.js". Phusion Passenger is a web server and application server, designed to be fast, robust and lightweight. It takes a lot of complexity out of deploying web apps, adds powerful enterprise-grade features that are useful in production, and makes administration much easier and less complex. On the other hand, Unicorn is detailed as "Rack HTTP server for fast clients and Unix". Unicorn is an HTTP server for Rack applications designed to only serve fast clients on low-latency, high-bandwidth connections and take advantage of features in Unix/Unix-like kernels. Slow clients should only be served by placing a reverse proxy capable of fully buffering both the the request and response in between Unicorn and slow clients.

Passenger and Unicorn can be categorized as "Web Servers" tools.

"Nginx integration" is the top reason why over 43 developers like Passenger, while over 80 developers mention "Fast" as the leading cause for choosing Unicorn.

Passenger and Unicorn are both open source tools. Passenger with 4.41K GitHub stars and 505 forks on GitHub appears to be more popular than Unicorn with 1.35K GitHub stars and 249 GitHub forks.

Code School, Fab, and Movielala are some of the popular companies that use Passenger, whereas Unicorn is used by Instacart, Harvest, and New Relic. Passenger has a broader approval, being mentioned in 380 company stacks & 40 developers stacks; compared to Unicorn, which is listed in 176 company stacks and 55 developer stacks.

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Pros of Passenger
Pros of Unicorn
  • 43
    Nginx integration
  • 36
    Great for rails
  • 21
    Fast web server
  • 19
    Free
  • 15
    Lightweight
  • 14
    Scalable
  • 13
    Rolling restarts
  • 10
    Multithreading
  • 9
    Out-of-process architecture
  • 6
    Low-bandwidth
  • 2
    Virtually infinitely scalable
  • 2
    Deployment error resistance
  • 2
    Mass deployment
  • 2
    High-latency
  • 1
    Many of its good features are only enterprise level
  • 1
    Apache integration
  • 1
    Secure
  • 1
    Asynchronous I/O
  • 1
    Multiple programming language support
  • 81
    Fast
  • 59
    Performance
  • 36
    Web server
  • 30
    Very light
  • 29
    Open Source
  • 27
    Rack http server
  • 18
    Load balancing
  • 14
    Great process management

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Cons of Passenger
Cons of Unicorn
  • 0
    Cost (some features require paid/pro)
  • 4
    Not multithreaded

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What is Passenger?

Phusion Passenger is a web server and application server, designed to be fast, robust and lightweight. It takes a lot of complexity out of deploying web apps, adds powerful enterprise-grade features that are useful in production, and makes administration much easier and less complex.

What is Unicorn?

Unicorn is an HTTP server for Rack applications designed to only serve fast clients on low-latency, high-bandwidth connections and take advantage of features in Unix/Unix-like kernels. Slow clients should only be served by placing a reverse proxy capable of fully buffering both the the request and response in between Unicorn and slow clients.

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Jobs that mention Passenger and Unicorn as a desired skillset
What companies use Passenger?
What companies use Unicorn?
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What tools integrate with Passenger?
What tools integrate with Unicorn?
    No integrations found

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    What are some alternatives to Passenger and Unicorn?
    Puma
    Unlike other Ruby Webservers, Puma was built for speed and parallelism. Puma is a small library that provides a very fast and concurrent HTTP 1.1 server for Ruby web applications.
    NGINX
    nginx [engine x] is an HTTP and reverse proxy server, as well as a mail proxy server, written by Igor Sysoev. According to Netcraft nginx served or proxied 30.46% of the top million busiest sites in Jan 2018.
    Apache HTTP Server
    The Apache HTTP Server is a powerful and flexible HTTP/1.1 compliant web server. Originally designed as a replacement for the NCSA HTTP Server, it has grown to be the most popular web server on the Internet.
    Microsoft IIS
    Internet Information Services (IIS) for Windows Server is a flexible, secure and manageable Web server for hosting anything on the Web. From media streaming to web applications, IIS's scalable and open architecture is ready to handle the most demanding tasks.
    Apache Tomcat
    Apache Tomcat powers numerous large-scale, mission-critical web applications across a diverse range of industries and organizations.
    See all alternatives
    How developers use Passenger and Unicorn
    SmartLogic uses
    Unicorn

    Rolling deploys are awesome! We use Unicorn to keep downtime to a minimum as we iterate quickly for our clients.

    pludoni GmbH uses
    Passenger

    "deploy + forget" application deployment with good default configuration.

    Avalanche Network uses
    Unicorn

    Our super server that runs a web instance and a worker instance.

    Trustroots uses
    Passenger

    Serving NodeJS app together with Nginx.

    douglasresende uses
    Unicorn

    I use with my Ruby on Rails projects.

    Karma uses
    Unicorn

    Our go-to Ruby application server.