# SDK Overview

> For AI agents: a documentation index is available at [/llms.txt](/llms.txt). Append `.md` to any page URL for markdown, or send `Accept: text/markdown`.

Statsig's SDKs are the in-code tool you use to show experiment variants, flag features, and log key business metrics. Statsig's SDKs:

- **Abstract the complexity:** Statsig handles caching, retry mechanisms, and networking.
- **Encourage best practices:** Built around parameters and language-specific best practices.
- **Broad deployment support:** 30+ SDKs across clients, servers, the edge, and more.

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## When to use Statsig SDKs

### 1. Targeting and assignment

Decide in code who sees new features and experiment variants. Target based on any **user attributes** (for example, location or device type) or **environment-level attributes** to control rollouts and experiment enrollment.

### 2. Logging events

Log key business metrics to power experiment and product analytics. Events flow into Statsig automatically. For web-based platforms (for example, JavaScript, React), Statsig also supports **[Autocaptured events](https://docs.statsig.com/webanalytics/overview)**.

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## Choose between client and server SDKs

Statsig offers both **client-side** and **server-side** SDKs, each suited to different use cases:

- **Client-side SDKs**: Designed for user-facing applications where you log events directly from the browser or mobile app. These SDKs operate in real time and provide instant feedback on user behavior.
- **Server-side SDKs**: Designed for backend services. Use server-side SDKs to control experiments, feature flags, and log server-side events. Server-side SDKs provide more control for use cases involving system-level actions or business logic.

For a detailed comparison, go to the [Client vs Server SDK Overview](https://docs.statsig.com/sdks/client-vs-server).

For frameworks like **Next.js** that bridge client and server-side logic, go to the [Next.js SDK](https://docs.statsig.com/client/Next) guide.

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## Available SDKs

Statsig offers SDKs for a wide variety of platforms:

### Client SDKs

### [JavaScript](https://docs.statsig.com/client/javascript-sdk)

Browser JavaScript

### [React](https://docs.statsig.com/client/React)

Client-Side React

### [React Native](https://docs.statsig.com/client/ReactNative)

Bare React Native SDK

### [Next.js](https://docs.statsig.com/client/Next)

Next.js SSR, SSG & Client-Side

### [Angular](https://docs.statsig.com/client/Angular)

Angular bindings for Javascript SDK

### [Swift](https://docs.statsig.com/client/iosClientSDK)

iOS, MacOS, tvOS SDK

### [Android](https://docs.statsig.com/client/Android)

Android Kotlin/Java SDK

### [.NET Client](https://docs.statsig.com/client/DotNet)

Client SDK for .NET framework

### [Roku](https://docs.statsig.com/client/Roku)

Roku Brightscript SDK

### [Unity](https://docs.statsig.com/client/Unity)

Unity game engine SDK

### [Dart/Flutter](https://docs.statsig.com/client/Dart)

Flutter/Dart Mobile App SDK

### [C++ Client](https://docs.statsig.com/client/CPP)

C++ client-side SDK

### Server side SDKs

### [Node.js](https://docs.statsig.com/server-core/node-core)

Node.js server SDK

### [Java](https://docs.statsig.com/server-core/java-core)

Java server SDK

### [Python](https://docs.statsig.com/server-core/python-core)

Python server SDK

### [Go](https://docs.statsig.com/server/go)

Go server SDK

### [Ruby](https://docs.statsig.com/server/ruby)

Ruby server SDK

### [.NET Server](https://docs.statsig.com/server-core/dotnet-core)

.NET server SDK

### [PHP](https://docs.statsig.com/server-core/php-core)

PHP server SDK

### [Rust](https://docs.statsig.com/server-core/rust-core)

Rust server SDK

### [C++ Server](https://docs.statsig.com/server-core/cpp-core)

C++ server SDK

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## Install your SDK

1. **Select your SDK**: Choose the client or server SDK that fits your platform from the lists above.
2. **Follow the installation guide**: Each SDK has an installation guide that walks you through setup.
3. **Start experimenting**: After you integrate the SDK, set up feature flags, run experiments, and log events for analysis.

If you have questions or need help with installation, reach out in the [Slack community](https://statsig.com/slack).