Best Configuration Management Products in 2025

Flagsmith lets you manage feature flags and remote config across web, mobile and server side applications. Deliver true Continuous Integration. Get builds out faster. Control who has access to new features. We're Open Source.

Key Flagsmith features:

Feature Flags Remote Config A/B/X Testing & Optimization Organization Management

Try for free Open Source freemium

ConfigCat is a developer-centric feature flag service with unlimited team size, awesome support, and a reasonable price tag.

Key ConfigCat features:

Integrations

freemium

LaunchDarkly is a powerful development tool which allows software developers to roll out updates and new features.

Key LaunchDarkly features:

Comprehensive Feature Flag Management Real-time Feature Control Scalability Team Collaboration

Flagsmith lets you manage feature flags and remote config across web, mobile and server side applications. Deliver true Continuous Integration. Get builds out faster. Control who has access to new features. We're Open Source.

Key Flagsmith features:

Feature Flags Remote Config A/B/X Testing & Optimization Organization Management

Try for free Open Source freemium

A non-repetitive alternative to YAML.

Key Dhall Configuration Language features:

Deterministic Type-Safe Total Programming Language Interoperability

Open Source

YAML 1.2 --- YAML: YAML Ain't Markup Language.

Key YAML features:

Human readability Hierarchical data representation Data interchange format Simplicity

Open Source

Type-safe feature flags, A/B testing, analytics and app configuration, with Git-style version control and local, synchronous, in-memory flag evaluation.

freemium

In a world where product development teams are pressured to do more with less, Split’s Feature Data Platform™ gives you the confidence to move fast without breaking things.

Key Split.io features:

Feature Flagging Data-Driven Decisions Integration Capabilities Scalability

Open Source

Unleash is an open-source feature management platform. We are private, secure, and ready for the most complex setups out of the box.

Key Unleash features:

Flexibility Open Source Multiple Environment Support Strong Community

Open Source freemium $75.0 / Monthly ("Enterprise Pay-as-you-go", "5 users")

A/B testing you'll actually use.

Key Optimizely features:

Comprehensive A/B Testing User-Friendly Interface Personalization Comprehensive Analytics

A powerful DSL for elegant description of JSON data.

Key Jsonnet features:

Configurability Extensibility JSON Compatibility Reduce Repetition

Open Source

Protocol buffers are a language-neutral, platform-neutral extensible mechanism for serializing structured data.

Key Protobuf features:

Efficient Serialization Language Support Versioning Support Type Safety

Open Source

TOML - Tom's Obvious, Minimal Language.

Key TOML features:

Human Readable Explicit Data Types Hierarchical Configuration Standardized Specification

Open Source

Open-source scientific and technical publishing system built on Pandoc.

Key Quarto features:

Versatility Extensibility Interactivity Multi-language Support

Open Source