refined VS Http4s

Compare refined vs Http4s and see what are their differences.


Refinement types for Scala (by fthomas)


A minimal, idiomatic Scala interface for HTTP (by http4s)
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refined Http4s
9 17
1,531 2,298
- 0.9%
8.6 9.9
15 days ago 1 day ago
Scala Scala
MIT License 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 refined. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-02-26.


Posts with mentions or reviews of Http4s. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-08-06.
  • Scala became Typelevel/Zio only ecosystem?
    4 projects | | 6 Aug 2022
    This is a long list of misunderstandings I don’t have the patience to unpack. Instead, let me refer you to the links in my top comment in the thread, then suggest you learn at least http4s, a purely-functional web service library that’s been used in production for a decade or so now.
  • Pleasant to use Scala libraries
    5 projects | | 6 Jul 2022
    I would say http4s and Doobie. Both are pure FP libraries in the Typelevel ecosystem. Both are exceptionally clear, extremely reliable, extremely pleasant to use… I like to point out http4s, in particular, is primarily a collection of types modeling the relevant RFCs. What behavior it has comes overwhelmingly from the underlying Cats, cats-effect, and fs2 libraries. This reflects the generality of those underlying libraries and the intense focus of the http4s team. The same applies to Rob Norris and Doobie, which tames JDBC as well as it can be tamed, IMO.
    5 projects | | 6 Jul 2022
    The most popular nowadays are - I guess - akka-http and http4s. You can also use Play if you don't want to start from scratch but prefer a framework-based approach.
  • Why do all frameworks use OOP? (php)
    1 project | | 11 Apr 2022
    There are functional frameworks:
  • Can we all please star our top 15 used Scala libraries ?
    1 project | | 18 Feb 2022
    If you look at the example it is listed as an import but there is no explicit reference to it. And if you were just doing basic synchronous responses then that would be the only time you would see it.
  • Scala Http Framework
    2 projects | | 29 Nov 2021
    If you want something more powerful, pure-functional and you need to do complex, concurrency-heavy operations, have a look at http4s:
  • Typelevel: On Recent Events
    9 projects | | 15 Nov 2021
    I don't think this is toxic but still, it doesn't sit well with me:
    9 projects | | 15 Nov 2021
  • Akka became the de-facto solution for Scala web development?
    6 projects | | 18 Sep 2021
  • Any HTTPS web proxy library in Scala?
    4 projects | | 6 Aug 2021
    Here is a possible sketch with the functional http4s library. In http4s, both Http clients and servers are modelled as functions from Http requests to an Http response generated from an IO action. This would be like a function Request => IO[Response], which in http4s is called an HttpApp.

What are some alternatives?

When comparing refined and Http4s you can also consider the following projects:

Akka HTTP - The Streaming-first HTTP server/module of Akka

sttp - The Scala HTTP client you always wanted! - Scala combinator library for building Finagle HTTP services

ZIO - ZIO — A type-safe, composable library for async and concurrent programming in Scala

Spray - A suite of scala libraries for building and consuming RESTful web services on top of Akka: lightweight, asynchronous, non-blocking, actor-based, testable

scalaj-http - Simple scala wrapper for HttpURLConnection. OAuth included.

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

Play - Play Framework

FS2 - Compositional, streaming I/O library for Scala

fs2-kafka - Functional Kafka Streams for Scala

cask - Cask: a Scala HTTP micro-framework

Scalaz - Principled Functional Programming in Scala