fields VS tapir

Compare fields vs tapir and see what are their differences.

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fields tapir
2 14
44 1,257
- 0.3%
0.0 8.0
over 1 year ago 1 day 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 fields. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-04-07.


Posts with mentions or reviews of tapir. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-02-21.
  • what library/framework should I use for backend development?
    3 projects | /r/scala | 21 Feb 2023
    You're not confined to the usual suggestions below (play, http4s). There's a ton of options. (I wrote test cases using a bunch of different frameworks a few years ago at Having written services using a variety of frameworks in production, I would strongly suggest using one that auto-generates API docs (openapi, swagger) for you. That will save you a huge amount of time later on. For heavier services, like the one at, I tend to the Java side (Quarkus is my current top choice, but Micronaut and Helidon are both great). For everything else I use Scala. My go-to right now is tapir using a vertx backend. See
  • Micronaut vs others(Spring Boot, Quarkus and co.)
    5 projects | /r/java | 10 Nov 2022
    Tapir is a Scala framework. (which runs on the JDK) Since the recent release of version 1.0, it's become my go to for many projects. It doens't provide much in the way of integrations with 3rd party frameworks, but I actually prefer that. It does autogenerate great swagger docs though.
  • Programming language comparison by reimplementing the same transit data app
    6 projects | | 23 Oct 2022
    I do wonder where the recommendation to use http4s for beginners came from. http4s is a very capable library (and if you care much about composition it is excellent), but I wouldn't describe the documentation as beginner friendly.

    A slightly better starting point for scala 3 + type-safe server building is tapir e.g. . With that, you get a declarative definition of your endpoints (+ error types, auth, etc.) that you can use for both servers and clients, which comes very handy when writing integration tests of course.

    > absolutely ridiculous the fetishization of extremely complex FP and type-level hacking that goes on in the ecosystem

    An alternative way to look at it is that there is a lot of essential domain complexity that gets encoded via the type system to let the compiler do the hard work. That "extremely complex FP" does not arrive out of nowhere - I really recommend at least skimming through the slides from rossabaker, the http4s designer, that motivate where the core type signature comes from

    I suppose one of the "features" that I like about the (typelevel) community is that the approach of "worse is better" is not taken, and a lot of effort is expended to make things correct, modular and orthogonal. This has the drawback of increased upfront complexity, that anecdotally pays off the moment your compiler does not error and the program runs as intended.

  • Scala.js AWS Lambda, using Scala 3
    6 projects | /r/scala | 13 Sep 2022
    Did you try tapir? There is a module for deploying aws lambda with Scala js. Not sure whether it is compatible with Scala 3, I am sticking with Scala 2 until Scala 3 gets more mature.
  • Library recommendations?
    4 projects | /r/scala | 9 Sep 2022
    I'm aware, but it's a design decision that was made on purpose, and which I find in practice not a big problem at all.
    4 projects | /r/scala | 9 Sep 2022
    In any case I strongly suggest to have a look at Tapir which will make your life a bit easier and allow you to swap the HTTP backend in the future if needed.
  • Monorepo: seeking for an advice for bi-lang project
    7 projects | /r/scala | 31 Jul 2022
    Backend is source of truth for types on frontend (backend generated OpenAPI definition with tapir, frontend takes it with orval)
  • Experienced dev new to Scala looking for a quick answer to get me on the right track - Advice on *standard* Scala framework stack to quickly set up a web-app backend ;
    2 projects | /r/scala | 3 Jul 2022
    In all cases I would strongly suggest to have a look at Tapir, regardless of the server implementation that you pick.
  • Resources for learning about http4s and Typelevel ecosystem?
    3 projects | /r/scala | 2 Feb 2022
    Finally I would strongly recommend having a look at Tapir. Even if you don't need to share endpoints or generate OpenAPI documentation, it provides a really neat abstraction on top of http4s.
  • Scala 3 Reflection
    5 projects | /r/scala | 1 Feb 2022
    Sounds like you want an IDL. smithy4s and tapir come to mind as potential solutions. Scala code gets generated for you from some intermediate format.

What are some alternatives?

When comparing fields and tapir you can also consider the following projects:

smithy4s -

http4s-jwt-auth - :lock: Opinionated JWT authentication library for Http4s

distage-example - Example project built using distage, tagless final, http4s, doobie and zio

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

scala-http-client - Extends the akka-http-client with retry logic, error handling, logging and signing

akka-http-metrics - Easily collect and expose metrics in your akka-http server

AkkaGRPC - Akka gRPC

Akka - Build highly concurrent, distributed, and resilient message-driven applications on the JVM

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

lesson-service - An API first approach to developing microservices using Tapir

lishogi - ☗ the forever free, adless and open source shogi server forked from ☗

gremlin-scala - Scala wrapper for Apache TinkerPop 3 Graph DSL