Feature flag tools: Which should you use? (With pricing)

Hello and welcome to an overview of feature flag tools. We love feature flags here, so the more developers can adopt them the better. We’ve made this handy list of feature flags companies to help you in your feature flag journey. Onwards!

What is Unleash

Hello, we’re Unleash, and our mission is to make life easier for developers. We’re an open-source Feature Management platform, i.e., we’re a really good way to help you use feature flags. This makes releasing new features less risky, and streamlines the software release process. Unleash can be used as a private hosted cloud instance or as a self-hosted solution, if you prefer that or need Fed Ramp or Air-Gapped use cases. The Unleash repo has over 10,000 GitHub stars and has been downloaded over 20 million times.

Why we made Unleash

In 2014 Ivar was working as a software developer at FINN.no, Norway’s largest online marketplace. Getting new features into production was a pain, so, as a developer, he looked around and wondered if he could write some code to make it easier. The initial goal was to protect features under development, allowing our team to transition to trunk-based development.

10 years later, he’s CTO of Unleash, and we’re the leading open-source feature flag solution. We serve the world’s largest, most security-conscious organizations, and we’re even rated the “Easiest Feature Management system to use” by G2.

List of feature flag tools.

Here’s our list of feature management platforms:





It’s us! We obviously think you should choose Unleash, but feature flags make everyone’s software better, and we want to live in a better world.


CloudBees specializes in software development and delivery automation. They offer solutions for continuous integration and continuous delivery (CI/CD). CloudBees Feature Management is their feature flags solution. They make Jenkins, an open-source automation tool.



ConfigCat is a feature flag and configuration management service. They provide a cloud-based platform for managing feature flags and remote configurations.


DevCycle is a feature management platform. The platform offers a dashboard for controlling feature rollouts and A/B testing.


Eppo is a feature flagging and experimentation platform. It offers feature flags and A/B tests. The platform lets you control feature rollouts and viewing experiment results.


FeatBit is an open-source feature flag and A/B testing platform. It provides a self-hosted and a cloud solution for managing feature flags and running experiments. 


FF4J (Feature Flipping for Java) is an open-source feature flag framework for Java applications and other JVM languages. The framework includes a web console for managing flags and monitoring their status.


Flagsmith is a feature flag and remote configuration service. It offers a platform for managing feature flags, remote config, and A/B testing. 


Flagd is an open-source feature flagging daemon. Flagd can be run as a sidecar container in Kubernetes or as a standalone service.



Flagr is a feature flagging, A/B testing and dynamic configuration microservice written in Go. It was originally developed by Checkr and then open-sourced later.


Flipper is an open-source tool for managing feature flags in Ruby applications. Flipper supports integration with different data stores like Redis and ActiveRecord. It’s commonly used in Rails projects.



Flipt is an open-source feature flag management solution. Its cloud offering is currently under development.


Go Feature Flag

GO Feature Flag is an open-source, feature flag management solution written in Go (obviously). GO Feature Flag supports gradual rollouts, user targeting, and A/B testing.



GrowthBook is an open-source feature flagging and experimentation platform.


Harness is a large software delivery platform known for providing many CI/CD and GitOps solutions. There is a feature flags service in its offering.




LaunchDarkly is a feature management and experimentation platform. It is one of the largest companies in the space.



Molasses is a suite of feature flag and A/B testing tools.




PostHog is an open-source product analytics and experimentation platform. It includes a feature flag service.



Split is a feature delivery platform that does feature flag management and experimentation. Split was acquired by Harness in 2024.


Statsig is a cloud platform for feature management and experimentation.


Statsig is a cloud platform for feature management and A/B testing.


Toggled is a multi-regional feature toggles management platform.


Comparison table

And finally, here’s a handy comparison table:

Company OSS License Started
Unleash Yes Apache 2014
CloudBees No Proprietary 2010
ConfigCat No Proprietary 2018
DevCycle No Proprietary 2022
Eppo No Proprietary 2021
Featbit Yes MIT 2022
FF4J Yes Apache 2022
Flagsmith Yes BSD-3-Clause 2018
flagd Yes Apache 2022
Flagr Yes Apache 2017
Flipper Yes MIT 2012
Flipt Yes GPL 2016
Go Feature Flag Yes MIT 2020
GrowthBook Yes MIT 2021
Harness No Apache 2014
LaunchDarkly No Proprietary 2014
Molasses Yes Proprietary 2020
PostHog Yes MIT 2020
Split No Proprietary 2020
Statsig Yes Proprietary 2021
Taplytics No Proprietary 2011
Toggled Yes Proprietary Not sure


Thank you for reading.

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