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What Is Feature Flag?

Donald Ng
April 24, 2024
5-star rating
Reviews on Capterra
“The only constant in the technology industry is change.” - Marc Benioff, CEO of Salesforce

One powerful tool that has gained traction among product managers and development teams is the feature flag. Feature flags enable teams to release new features with confidence, gather valuable insights, and deliver exceptional user experiences.

What is a Feature Flag

A feature flag is a technique that allows developers to enable or disable specific features or functionalities of an application without deploying new code. It acts as a control mechanism, separating the feature release process from the code deployment process.

Imagine you’re working on a new feature for your SaaS product, but you’re unsure if it’s ready for all your users. With a feature flag, you can release the feature to a select group of users, gather feedback, and make necessary improvements before rolling it out to your entire user base.

Here’s a simple example of how a feature flag can be implemented:

// Ensure flags are loaded before usage.
// Only needed to load once and cached
client.onFeatureFlags(function() {
   // feature flags should be available at this point
   if (client.isFeatureEnabled('betaFeature') ) {
       // Enable the new feature
   } else {
       // Use the existing functionality

In this example, the featureFlagSDK.isFeatureEnabled('betaFeature') condition checks whether the betaFeature flag is enabled. If it is, the new feature is activated. Otherwise, the existing functionality is used.

Benefits of Using Feature Flags

Feature flags offer several key benefits for product managers and development teams:

  1. Risk Mitigation: Feature flags allow you to test new features with a limited audience, reducing the risk of introducing bugs or negative user experiences to your entire user base. If something goes wrong, you can quickly disable the feature without rolling back the entire deployment.
  2. Incremental Rollouts: With feature flags, you can gradually roll out new features to a percentage of your users. This approach, known as incremental rollouts or canary releases, enables you to monitor performance, gather user feedback, and make data-driven decisions before a full rollout.
  3. Experimentation and A/B Testing: Feature flags are an essential tool for conducting experiments and A/B tests. You can enable different variations of a feature for different user segments and measure their impact on key metrics. This data-driven approach helps you optimize your product and make informed decisions.
  4. Continuous Delivery: Feature flags support continuous delivery practices by decoupling feature releases from code deployments. You can deploy new code to production frequently without exposing incomplete or untested features to your users. This allows for faster iteration and reduces the time to market for new features.
  5. Customization and Targeting: Feature flags enable you to customize your application for specific user segments or customers. You can enable or disable features based on user preferences, subscription plans, or other criteria, providing a tailored experience for each user.

Implementing Feature Flags

To implement feature flags in your SaaS application, you can leverage various tools and frameworks. One such platform is, which provides a comprehensive solution for feature flag management. offers a user-friendly interface, seamless integration with multiple programming languages, and powerful targeting capabilities. It allows you to define feature flags, set targeting rules, and update flag configurations in real-time without redeploying your application.

Additionally, provides detailed analytics and insights into the performance and usage of your feature flags. You can track key metrics, monitor user engagement, and make data-driven decisions to optimize your features and improve the user experience.

While is a solid choice, it’s important to evaluate different feature flag management solutions and choose the one that best aligns with your specific requirements and development stack.


Feature flags have become a game-changer for product managers and development teams in the fast-paced world of software development. They enable controlled releases, risk mitigation, experimentation, and customization, ultimately leading to better products and happier customers.

By embracing feature flags in your software development process, you can innovate faster, gather valuable insights, and deliver exceptional user experiences. Whether you choose or another feature flag management solution, the key is to start exploring and leveraging the power of feature flags in your SaaS application.

Remember, with great power comes great responsibility. Use feature flags wisely, monitor their impact, and always prioritize the needs and experiences of your users.

Happy feature flagging!

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