dotty VS Slick

Compare dotty vs Slick and see what are their differences.


The Scala 3 compiler, also known as Dotty. (by lampepfl)


Slick (Scala Language Integrated Connection Kit) is a modern database query and access library for Scala (by slick)
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dotty Slick
71 17
5,417 2,619
0.8% 0.5%
9.9 9.0
5 days ago 7 days ago
Scala Scala
Apache License 2.0 BSD 2-clause "Simplified" License
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 dotty. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-09-13.
  • RustRover – A Standalone Rust IDE by JetBrains
    3 projects | | 13 Sep 2023
    Dotty? Was it still the name later?

  • Does the fthomas/refined library work differently in Scala 3?
    3 projects | /r/scala | 20 Jun 2023
    I think this might be related to this issue.
  • `boundary/break`: do you use it ? what do you do with it ?
    3 projects | /r/scala | 12 Jun 2023
    You can look (and EPFL collect feedback) about EPFL implementation of async/await: Also you can look at dotty ticket about this:
  • Iron updates: turning opaque types into value objects
    2 projects | /r/scala | 6 Jun 2023
    The reason I’m not currently an opaque type user as they do not play well with the tagless final style we use, though I am patiently awaiting some attention on my bug report:
  • Reconnecting with Scala. What's new?
    7 projects | /r/scala | 24 May 2023
    Links: - - - - - - - - - - - - -
  • About Scala-Native
    4 projects | /r/scala | 13 Apr 2023
    Scala Native has much more control on how the Scala AST is compiled, and can easier workaround platform limitations, eg. lazy vals in Scala 3 required reflection config for Native Image (see this and that), while in Scala Native we could mitigate problems with unsupported usage inside in other ways within the compiler plugin.
  • What is scala's modern Web API framework?
    5 projects | /r/scala | 7 Mar 2023
    For example, this issue ( was blocking the migration, it was reported more than a year ago and the fix was finally released a month ago (
  • scala 3 does not have :javap. Does anyone have any tips how to get around this.
    2 projects | /r/scala | 22 Feb 2023
    For the record, there is an implementation of :javap which is close to being done but might need a volunteer to get it over the finish line:
  • Scala Resurrection
    6 projects | /r/scala | 24 Jan 2023
    Ahhh no unused warnings, thats disappointing to say the least. I guess some progress is being made here , tbh this kind of stuff makes me want to stick to Scala 2.
  • Scala DevInTraining looking to contribute to projects
    7 projects | /r/scala | 15 Jan 2023


Posts with mentions or reviews of Slick. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-07-12.
  • How many people/companies are fully on Scala 3?
    4 projects | /r/scala | 12 Jul 2023
  • First Slick prerelease for Scala 3!
    2 projects | /r/scala | 9 Jul 2023
    Made a PR on slick to document this (workaround is quite easy, you can just define def tupled = (apply _).tupled in the companion object of the case class and it will also compile for all Scala versions).
    2 projects | /r/scala | 9 Jul 2023
  • Sketch of a Post-ORM
    14 projects | | 2 Jun 2023
    The Scala ecosystem has a few ways to do composable type-safe query building, e.g. Slick[0] or more recently Quill[1]. . I believe both also have ways to do compile-time string interpolation (e.g. sql"""select * from users where id = ${}""") which generate prepared statements (I know Slick does prepared statements. Quill has similar macros but I haven't looked into how safe they are to use).


  • Database abstraction library which allows a clean domain model
    2 projects | /r/scala | 20 Jan 2023
    With all this in mind, I landed at the first candidate: slick from that you all probably know.
  • Scala 3 migration: 7 benefits that outweigh the risks
    2 projects | /r/scala | 3 Nov 2022
    I think Slick's current priority is also getting in Scala 3 support:
  • Slick 3.4.x is here!
    3 projects | /r/scala | 18 Sep 2022
    Future releases might not be announced here. To get notified, go to, click the Watch dropdown button at the top, select Custom, check Releases, and click Apply.
  • Is there any good resource for learning Slick (3.x)?
    2 projects | /r/scala | 2 Sep 2022 now I use slightly lower version of slick so this might be an upgrade that resolves (I do recall using it in 21 and it was still buggy and I filed a ticket, which I cannot find at the moment), but given a complex enough query (we have one in PROD which has tons of flexibility in terms of filters that can be passed in) but it also makes for complex code.
  • Slick 3.4.0 is imminent
    2 projects | /r/scala | 16 Aug 2022
    I started writing a reply but then I realized it would be long and depends on exactly what you mean, so maybe it's better to post the question in
    2 projects | /r/scala | 16 Aug 2022
    You can see the draft release notes here and the upgrade guide at The latest docs are at

What are some alternatives?

When comparing dotty and Slick you can also consider the following projects:

doobie - Functional JDBC layer for Scala.

Quill - Compile-time Language Integrated Queries for Scala

ScalikeJDBC - A tidy SQL-based DB access library for Scala developers. This library naturally wraps JDBC APIs and provides you easy-to-use APIs.

Squeryl - A Scala DSL for talking with databases with minimum verbosity and maximum type safety

Sorm - A functional boilerplate-free Scala ORM

Clickhouse-scala-client - Clickhouse Scala Client with Reactive Streams support

Anorm - The Anorm database library

sbt - sbt, the interactive build tool

Scalatex - Programmable, Typesafe Document Generation

scalajs-benchmark - Benchmarks: write in Scala or JS, run in your browser. Live demo:

cats-effect - The pure asynchronous runtime for Scala

Mill - Your shiny new Java/Scala build tool!