# LaunchDarkly Server-Side SDK for Erlang/Elixir

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## LaunchDarkly overview

[LaunchDarkly]( is a feature management platform that serves trillions of feature flags daily to help teams build better software, faster. [Get started]( using LaunchDarkly today!

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## Supported Erlang/OTP versions

This version of the LaunchDarkly SDK is compatible with Erlang/OTP 21 or higher.

## Getting started

Refer to the [SDK reference guide]( for instructions on getting started with using the SDK.

## Learn more

Read our [documentation]( for in-depth instructions on configuring and using LaunchDarkly. You can also head straight to the [complete reference guide for this SDK](

## Testing

We run integration tests for all our SDKs using a centralized test harness. This approach gives us the ability to test for consistency across SDKs, as well as test networking behavior in a long-running application. These tests cover each method in the SDK, and verify that event sending, flag evaluation, stream reconnection, and other aspects of the SDK all behave correctly.

## Contributing

We encourage pull requests and other contributions from the community. Check out our [contributing guidelines]( for instructions on how to contribute to this SDK.

## About LaunchDarkly

* LaunchDarkly is a continuous delivery platform that provides feature flags as a service and allows developers to iterate quickly and safely. We allow you to easily flag your features and manage them from the LaunchDarkly dashboard.  With LaunchDarkly, you can:
    * Roll out a new feature to a subset of your users (like a group of users who opt-in to a beta tester group), gathering feedback and bug reports from real-world use cases.
    * Gradually roll out a feature to an increasing percentage of users, and track the effect that the feature has on key metrics (for instance, how likely is a user to complete a purchase if they have feature A versus feature B?).
    * Turn off a feature that you realize is causing performance problems in production, without needing to re-deploy, or even restart the application with a changed configuration file.
    * Grant access to certain features based on user attributes, like payment plan (eg: users on the ‘gold’ plan get access to more features than users in the ‘silver’ plan). Disable parts of your application to facilitate maintenance, without taking everything offline.
* LaunchDarkly provides feature flag SDKs for a wide variety of languages and technologies. Check out [our documentation]( for a complete list.
* Explore LaunchDarkly
    * []( "LaunchDarkly Main Website") for more information
    * [](  "LaunchDarkly Documentation") for our documentation and SDK reference guides
    * [](  "LaunchDarkly API Documentation") for our API documentation
    * [](  "LaunchDarkly Blog Documentation") for the latest product updates