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:
Unleash
- License: Apache 2
- GitHub Stars: 12.7k
- First commit: September 2014
- Website: getunleash.io Repo: https://github.com/Unleash/unleash/
- Price:
- Pricing Page: https://www.getunleash.io/pricing
- Free to self-host, and Enterprise plans available ($75/seat/month) for more security, visibility and control.
Screenshot
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
- Website: www.cloudbees.com
- Price:
- Pricing Page: https://www.cloudbees.com/products/saas-platform/pricing
- Free up to 5 users, then it’s seat-based (contact sales).
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
- Website: configcat.com
- Price:
- Pricing Page: https://configcat.com/#pricing
- Free for two environments and 10 feature flags, then $100, then $300, then $850, then $4,000 per month.
ConfigCat is a feature flag and configuration management service. They provide a cloud-based platform for managing feature flags and remote configurations.
DevCycle
- Website: https://devcycle.com/
- Price:
- Pricing Page: https://devcycle.com/pricing
- Unlimited seats, based on MAUs (Monthly Active Users). Free up to 1,000 MAUs, Developer ($10-500), Business ($500-10,000). Enterprise plans available.
DevCycle is a feature management platform. The platform offers a dashboard for controlling feature rollouts and A/B testing.
Eppo
- Website: https://www.geteppo.com (acquired by Datadog in May 2025)
- Price:
- Pricing Page: N/A
- Public pricing not available since the acquisition.
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
- License: MIT
- GitHub Stars: 1.6k
- First commit: August 2022
- Website: featbit.co Repo: https://github.com/featbit/featbit
- Price:
- Pricing Page: https://dashboard.featbit.co/
- Free tier and enterprise plan for $3,999/year for self-hosting. $49.90, $399 and enterprise plans for cloud offering.
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
- License: Apache 2
- GitHub Stars: 1.4k
- First commit: June 2013
- Website: https://ff4j.github.io Repo: https://github.com/ff4j/ff4j/
- Price: Free
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
- License: BSD-3-Clause
- GitHub Stars: 6k
- First commit: June 2018
- Website: flagsmith.com Repo: https://github.com/Flagsmith/flagsmith
- Price:
- Pricing Page: https://www.flagsmith.com/pricing
- Free up to 50,000 reqs/month (1 user, 1 project), then $45 up to 1M reqs/month (3 users, unlimited projects). Enterprise plans available.
Flagsmith is a feature flag and remote configuration service. It offers a platform for managing feature flags, remote config, and A/B testing.
flagd
- License: Apache 2
- GitHub Stars: 779
- First commit: May 2022
- Website: https://flagd.dev Repo: https://github.com/open-feature/flagd
- Price: Free
Flagd is an open-source feature flagging daemon. Flagd can be run as a sidecar container in Kubernetes or as a standalone service.
Flagr
- License: Apache
- GitHub Stars: 2.5k
- First commit: October 2017
- Website: openflagr.github.io/flagr/#/ Repo: https://github.com/openflagr/flagr/
- Price: Free
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
- License: MIT
- GitHub Stars: 3.9k
- First commit: July 2012
- Website: flippercloud.io Repo: https://github.com/flippercloud/flipper/
- Price:
- Pricing Page: https://www.flippercloud.io/pricing
- Free up to two users and 5 flags, then $49, then $149, then $299 – based on seats, polling frequency, and data retention.
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
- License: GPL
- GitHub Stars: 4.6k
- First commit: November 2016
- Website: flipt.io Repo: https://github.com/flipt-io/flipt/
- Price: Free for OSS, $100 for Pro plan. Enterprise plans available.
Flipt is an open-source feature flag management solution focused on git-native integrations.
Go Feature Flag
- License: MIT
- GitHub Stars: 1.8k
- First commit: December 2020
- Website: gofeatureflag.org Repo: https://github.com/thomaspoignant/go-feature-flag/
- Price: Free, with optional Enterprise Support.
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
- License: MIT
- GitHub Stars: 7k
- First commit: May 2021
- Website: growthbook.io Repo: https://github.com/growthbook/growthbook/
- Price:
- Pricing Page: https://www.growthbook.io/pricing
- Free to self-host. Free for 3 cloud users, then $20/month/user. Enterprise plans available.
GrowthBook is an open-source feature flagging and experimentation platform.
Harness
- License: Apache 2
- GitHub Stars: 33k
- First commit: February 2014
- Website: harness.io Repo: https://github.com/harness/gitness
- Price:
- Pricing Page: https://www.harness.io/pricing
- Free version, a startup plan (starting from $20/month per developer) and an enterprise plan
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
- Website: https://launchdarkly.com
- Price:
- Pricing Page: https://launchdarkly.com/pricing/
- Free to up 1,000 MAUs, then $12 per service connection and $10 per 1,000 MAUs. Enterprise plans available.
LaunchDarkly is a feature management and experimentation platform. It is one of the largest companies in the space.
PostHog
- License: MIT Expat
- GitHub Stars: 29k
- First commit: January 2020
- Website: https://posthog.com, Repo: https://github.com/PostHog/posthog
- Price:
- Pricing Page: https://posthog.com/pricing
- Free tier and self-hosting. Enterprise and pay-per-request plans available.
PostHog is an open-source product analytics and experimentation platform. It includes a feature flag service.
Statsig
- Website: statsig.com (acquired by OpenAI in September 2025)
- Price:
- Pricing Page: https://statsig.com/pricing
- Free up to 2M metered events per month, then $150 (up to 5M metered events). Enterprise plans available.
Statsig is a cloud platform for feature management and experimentation.
Toggled
- Website: https://www.toggled.dev
- Price:
- Pricing Page: https://www.toggled.dev/#pricing
- Free up to 2 seats, or $49/month (up to 3 projects and 10 seats). Enterprise plans available.
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 |
| PostHog | Yes | MIT | 2020 |
| Statsig | Yes | Proprietary | 2021 |
| Toggled | Yes | Proprietary | Not sure |
Thank you for reading.
