Jsonnet is a data-templating language that helps you organize your configuration data in a clean and concise way.
Best Dhall Alternatives ranked by AI · updated Aug 2026
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Dhall is a programmable configuration language with static typing, imports, and normalization. It is aimed at teams that want reusable, secure configuration without unrestricted code execution.
Top 6 Dhall alternatives
Nickel is a programmable configuration language for generating, validating, and composing structured configuration data. It targets developers and infrastructure teams that need...
Pros
- Combines typed contracts with flexible configuration defaults and overrides
- Supports compositional configuration and validation in one language
- Rust implementation offers a standalone command-line tool and library ecosystem
Cons
- Smaller ecosystem and user community than HCL, YAML, or Jsonnet
- Fewer editor integrations and production-ready third-party tools
- Requires learning a functional language model and Nickel-specific syntax
Free, open source
3
CUE is a cloud-based newsroom software that streamlines content creation and distribution.
Pros
- Intuitive interface for non-technical users
- Real-time collaboration features
Cons
- Less customizable compared to Superdesk
- Limited advanced features
Contact for pricing
4
HCL
HashiCorp
HCL is a configuration language designed for human-readable infrastructure and application settings. It is used by Terraform and other HashiCorp tools, making...
Pros
- Strongest ecosystem integration for Terraform-based infrastructure workflows
- Readable block syntax is approachable for operations and platform teams
- Broad provider and tooling ecosystem through Terraform
Cons
- Less expressive and general-purpose than Nickel for complex configuration logic
- Terraform's evaluation model adds complexity around dependencies and values
- Most advanced capabilities are tied to HashiCorp tooling
Free, open source
5
Starlark
Bazel Project
Starlark is a deterministic configuration and extension language derived from Python syntax. It is used by Bazel and other build systems for...
Pros
- Familiar Python-like syntax lowers the entry barrier for developers
- Deterministic execution and restricted features improve build reproducibility
- Strong fit for programmable build and repository configuration
Cons
- Less focused on data contracts and validation than Nickel
- Dialect differences between host tools can reduce portability
- Not designed primarily for general infrastructure configuration
Free, open source
6
KCL
KCL Team
KCL is a constraint-based configuration language for writing, validating, and generating cloud-native configuration. It targets platform engineers working with Kubernetes, policies, and...
Pros
- Built-in schemas and constraints are well suited to Kubernetes configuration
- Supports configuration inheritance, overrides, and validation
- Offers stronger cloud-native integration than Nickel
Cons
- Smaller ecosystem and adoption than HCL, Jsonnet, or CUE
- Cloud-native focus makes it less general than Nickel
- Tooling and documentation are less mature than established alternatives
Free, open source
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