Caliban is a purely functional library for building GraphQL servers and clients in Scala.

The design principles behind the library are the following:

• minimal amount of boilerplate: no need to manually define a schema for every type in your API.
• pure interface: errors and effects are returned explicitly (no exceptions thrown), all returned types are referentially transparent (no Future).
• clean separation between schema definition and implementation: schema is defined and validated at compile time using Scala standard types, resolver (RootResolver) is a simple value provided at runtime.

Here is a partial list of companies using Caliban in production.

Want to see your company here? Submit a PR!

• AutoScout24
• Carvana
• Credimi
• Devsisters
• Fugo.ai
• LeadIQ
• Sanjagh.pro
• Soundtrack Your Brand