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Passenger

1.4K
290
+ 1
199
Puma

770
254
+ 1
19
Unicorn

487
388
+ 1
295
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Pros of Passenger
Pros of Puma
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
  • 3
    Convenient
  • 3
    Free
  • 3
    Easy
  • 2
    Multithreaded
  • 2
    Default Rails server
  • 2
    First-class support for WebSockets
  • 2
    Consumes less memory than Unicorn
  • 1
    Lightweight
  • 1
    Fast
  • 81
    Fast
  • 59
    Performance
  • 36
    Web server
  • 30
    Open Source
  • 30
    Very light
  • 27
    Rack http server
  • 18
    Load balancing
  • 14
    Great process management

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Cons of Passenger
Cons of Puma
Cons of Unicorn
  • 0
    Cost (some features require paid/pro)
  • 0
    Uses `select` (limited client count)
  • 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 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.

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, Puma, and Unicorn as a desired skillset
What companies use Passenger?
What companies use Puma?
What companies use Unicorn?

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What tools integrate with Passenger?
What tools integrate with Puma?
What tools integrate with Unicorn?
    No integrations found
      No integrations found

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      Blog Posts

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      What are some alternatives to Passenger, Puma, and Unicorn?
      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.
      Apache Tomcat
      Apache Tomcat powers numerous large-scale, mission-critical web applications across a diverse range of industries and organizations.
      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.
      OpenResty
      OpenResty (aka. ngx_openresty) is a full-fledged web application server by bundling the standard Nginx core, lots of 3rd-party Nginx modules, as well as most of their external dependencies.
      See all alternatives