GraphQL Kotlin

At a glance

• Editor score
  7.2 / 10
• Pricing
  Free plan
• Best for
  Kotlin teams needing typed GraphQL clients
• Free plan
  Yes
• Paid from
  Free
• Deployment model
  Self-hosted
• Facts checked
  21 Sep 2026

• Where it wins

  • Generates typed client models and operation classes
  • Supports code-first schema generation from Kotlin objects
  • Includes Gradle, Maven, validation, and federation tooling

• Where it doesn't

  • Focused on Kotlin rather than multiple programming languages
  • Self-hosted libraries require teams to manage their own deployment
  • Broader server and client features may exceed a single-use case

Our verdict on GraphQL Kotlin

GraphQL Kotlin is an open-source collection of Kotlin libraries for building GraphQL servers and type-safe clients. It is intended for Kotlin/JVM developers and teams that need to implement GraphQL APIs or consume existing GraphQL schemas in JVM applications. The toolkit covers both sides of GraphQL development, with code-first schema generation from Kotlin objects, generated client data models and operation classes, a type-safe HTTP client, and server modules with framework integrations.

Its strongest fit is for teams that want typed development workflows inside Kotlin projects. GraphQL Kotlin can introspect schemas, download SDL, and validate queries against a target schema. It also provides Gradle and Maven build plugins, which align its code-generation and validation capabilities with common JVM build workflows. Listed integrations include Ktor HTTP Client, Spring WebClient, Gradle, and Maven. Apollo Federation schema extensions add a federation-oriented option for teams building compatible GraphQL services.

The trade-off is its narrow language and deployment focus. GraphQL Kotlin is self-hosted open-source tooling rather than a hosted SaaS product, so teams adopting it are choosing libraries and build integrations rather than a managed service. Its supported-language focus is Kotlin, and the listed ecosystem connections center on Kotlin/JVM and selected HTTP clients and build systems. Choose it when Kotlin is central to the application and you need typed clients, schema tooling, or server components in one collection. Consider an alternative when your team needs broader language coverage, a hosted operating model, or a platform centered on managed GraphQL operations.

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GraphQL Kotlin pricing

GraphQL Kotlin fact sheet

GraphQL Kotlin integrations

GraphQL Kotlin lists 4 integrations on its own site.

• Ktor HTTP Client
• Spring WebClient
• Gradle
• Maven

Alternatives to GraphQL Kotlin

• Apollo GraphOSA broad GraphQL operations platform for teams managing federated APIs at scale.9.4
• HasuraA model-based API platform for composing, governing, and observing data APIs.9.2
• GraphQL HiveA broad GraphQL governance platform with a free tier and self-hosting.9.0

See all GraphQL Kotlin alternatives →

Featured on iTechGuides

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update