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These docs are for v2.0. Click to read the latest docs for v3.0.

[Optimizely Full Stack](🔗) is an experimentation and feature flagging platform for websites, mobile apps, chatbots, APIs, smart devices, and anything else with a network connection. You can deploy code behind feature flags, experiment with A/B tests, and rollout or rollback features immediately. All of this functionality is available with zero performance impact via easy-to-use SDKs.

## Supported functionality

Our SDKs are built for developers, and support:

  • **Feature flags and experimentation** – Our SDK framework natively integrates feature flags and product experimentation, so you can continuously iterate, roll features out, and roll them back.

  • **Remote configuration** – Update experiments in real time without a code deploy. Toggle features on and off, or change configuration variables.

  • **No latency** – In-memory bucketing means no blocking network requests. Test in performance-critical code paths, secure environments, and more.

  • **Real-time results**[Optimizely's Stats Engine](🔗) provides best-in-class statistical modeling and immediate, trustable results without waiting for long, manual data queries.

  • **Cross-platform experimentation** – Run server-side or client-side, on any connected device—mobile apps, websites, TV apps—with [consistent bucketing](🔗) across different languages.

## Get started

Learn more about [major concepts in Full Stack](🔗) or jump into creating your first experiment:

  1. [Install the SDK](🔗) and [customize](🔗) it for your application.

  2. [Get the datafile](🔗) for low-latency data sharing.

  3. [Instantiate an Optimizely Client](🔗) in your code. If you're using a mobile platform, [initialize a mobile SDK](🔗).

  4. Define [feature flags](🔗) that you'll use to roll out features or run feature tests.

  5. Use your feature flag to run [feature tests](🔗) without deploying code, or run a standalone [A/B test](🔗). Choose [user IDs](🔗), [target](🔗) with attributes, [track events](🔗), and [preview experiment variations](🔗).

  6. Analyze the [results](🔗) of your experiment.

See the [API Reference](🔗) for details about each API method, such as required arguments, return values, and side effects.


To build a broad experimentation program across technical and less-technical teams, pair Full Stack with [Optimizely Web](🔗) to integrate server-side and client-side experimentation in a single platform. For more information, see our support article [Experiment end-to-end with Optimizely Web and Full Stack](🔗).

If you have any questions, please [contact Support](🔗). We will be happy to help you set up any of our SDKs!