scala-pet-store VS ZIO

Compare scala-pet-store vs ZIO and see what are their differences.

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scala-pet-store ZIO
10 58
1,041 3,876
- 0.2%
0.0 6.7
10 days ago 5 days ago
Scala Scala
Apache License 2.0 Apache License 2.0
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.


Posts with mentions or reviews of scala-pet-store. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-01-24.
  • Scala Resurrection
    6 projects | /r/scala | 24 Jan 2023
    Hello, you can try to look for pet store implementations on GitHub using Scala, like The "Pet Store" is usually an example repo demonstrating how to build a CRUD service. Since Scala is a language capable of expressing multiple design techniques, multiple ways of solving similar problems exist, which is neither good nor bad, just irritating for a beginner.
  • Grasping the concepts and getting them down to earth
    4 projects | /r/scala | 4 Nov 2022
  • Looking for a really good/complex example codebase or tutorial for Scala FP
    6 projects | /r/scala | 8 Mar 2022
    6 projects | /r/scala | 8 Mar 2022
  • Scala FP code samples?
    8 projects | /r/scala | 22 Jan 2022
    Hi guys, finish you know of any good github sample apps, written in scala, in proper functional style ? the ⠀goal is to see actual production code that is FP worthy, to look up to :) I am looking to see how FP looks in practice similar to or I have 2 years of scala experience, mostly akka tech stack, and some basic cats knowledge. Thanks Mircea
  • Do you have someone experienced with Flutter and Scala? What is your stack, and what do you think about this?
    3 projects | /r/scala | 20 Sep 2021
  • Example of building web apis (functionally) in Scala
    12 projects | /r/scala | 16 Feb 2021 My case is the first one. I've been working with scala for a while using Akka actors, Akka http and Play and I would like to see the FP scala concept and its libraries working in a real project.
    12 projects | /r/scala | 16 Feb 2021
    I learned a lot from this project. It's not a tutorial or a lib. It's a fully functional yet simple project:
    12 projects | /r/scala | 16 Feb 2021
    One sample app using DDD I like is the Scala Pet Store.
    12 projects | /r/scala | 16 Feb 2021


Posts with mentions or reviews of ZIO. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-07-11.
  • I had a great experience with Scala and hopefully it will get more popular
    10 projects | /r/scala | 11 Jul 2023
    scala has 2 healthy and pretty complete lib ecosystems : check out typelevel and ZIO. Both are FP oriented, which might not be your cup of tea at first glance but I would encourage you to try em out ! Softest introduction would be to start with the typelevel cats library and build up from there. The excellent Scala with Cats will ease you softly into an FP mindset. It's a bit dated and for scala 2 only but translating to Scala 3 is a very good exercise if you feel so inclined !
  • Is it prudent to use Scala for anything new?
    2 projects | | 14 Jun 2023
    Last but not least, Scala is currently the language with one of the best effect systems in my opinion ( Kotlin for example has copied the approach with which I think is great actually. But when comparing Scala and Kotlin here, Scala wins by a large margin, it is a completely different world. It's like building a highly concurrent system in Erlang vs C.

    Of course, if you don't want to learn things like union types, traits/typeclasses and effects (similar to async/await but more powerful) you will be annoyed by Scala. But once you learned them, you can never go back.

  • How to get started?
    4 projects | /r/scala | 2 Jun 2023
  • Reconnecting with Scala. What's new?
    7 projects | /r/scala | 24 May 2023
    Links: - - - - - - - - - - - - -
  • Is Parallel Programming Hard, and, If So, What Can You Do About It? [pdf]
    4 projects | | 19 Feb 2023
    I use ZIO ( for Scala which makes parallel programming trivial.

    Wraps different styles of asynchronicity e.g. callbacks, futures, fibers into one coherent model. And has excellent resource management so you can be sure that when you are forking a task that it will always clean up after itself.

    Have yet to see anything that comes close whilst still being practical i.e. you can leverage the very large ecosystem of Java libraries.

  • 40x Faster! We rewrote our project with Rust!
    5 projects | /r/rust | 30 Jan 2023
    The one advantage Rust has over Scala is that it detects data races at compile time, and that's a big time saver if you use low level thread synchronization. However, if you write pure FP code with ZIO or Cats Effect that's basically a non-issue anyway.
  • What’s so great about functional programming anyway?
    8 projects | | 16 Nov 2022
    > It's a weakness of functional programming, not the language.

    I would strongly object this.

    Have you seen ZIO?

  • Switching career from F# to scala
    2 projects | /r/scala | 24 Oct 2022
    But overall, I'm happier with Scala. It has not one, but two lively FP communities. I recommend that you pick one of them: ZIO or TypeLevel (Cats Effect, fs2, http4s, ...). To some extent, you can mix TypeLevel libraries in ZIO projects.
  • New to Scala;
    8 projects | /r/scala | 14 Oct 2022
  • Next Steps for Rust in the Kernel
    8 projects | | 21 Sep 2022
    I think "better Haskell on JVM" (in contrast to "worse Haskell") is a good identity for Scala to have. (Please note that this is an intentional hyperbole.)

    Of course, there are areas where Haskell is stronger than Scala (hint: modularity, crucial for good Software Engineering, is not one of them). And Scala has its own way of doing things, so just imitating Haskell won't work well.

    Examples of this "better Haskell" are and .

    All together, Scala may be a better choice for you if you want to do Pure Functional Programming. And is definitely less risky (runs on JVM, Java libraries interop, IntelliJ, easy debugging, etc...).

    None of the other languages you mentioned are viable in this sense (if also you want a powerful type system, which rules out Clojure).

    I agree that Rust's identity is pretty clear: a modern language for use cases where only C or C++ could have been used before.

What are some alternatives?

When comparing scala-pet-store and ZIO you can also consider the following projects:

cats-effect - The pure asynchronous runtime for Scala

Monix - Asynchronous, Reactive Programming for Scala and Scala.js.

Http4s - A minimal, idiomatic Scala interface for HTTP

cats - Lightweight, modular, and extensible library for functional programming.

Vert.x - Vert.x is a tool-kit for building reactive applications on the JVM

fs2-kafka - Functional Kafka Streams for Scala

Reactor-Scala-Extensions - A scala extension for Project Reactor's Flux and Mono

Scala.Rx - An experimental library for Functional Reactive Programming in Scala

pfps-shopping-cart - :shopping_cart: The Shopping Cart application developed in the book "Practical FP in Scala: A hands-on approach"

RxScala - RxScala – Reactive Extensions for Scala – a library for composing asynchronous and event-based programs using observable sequences

scalajs-react - Facebook's React on Scala.JS

Laminar - Simple, expressive, and safe UI library for Scala.js