---
title: "Experimentation with Statsig"
description: "Reduce CLS and improve performance from client-loaded experiments at the edge with Statsig"
url: "https://vercel.com/templates/next.js/ab-testing-statsig"
links:
  repository: "https://github.com/vercel/examples/tree/main/edge-middleware/ab-testing-statsig"
  demo: "https://edge-ab-testing-statsig.vercel.app"
  deploy: "https://vercel.com/new/clone?demo-title=Experimentation+with+Statsig&demo-description=Reduce+CLS+and+improve+performance+from+client-loaded+experiments+at+the+edge+with+Statsig&demo-url=https%3A%2F%2Fedge-ab-testing-statsig.vercel.app&project-name=ab-testing-statsig&repository-name=ab-testing-statsig&repository-url=https%3A%2F%2Fgithub.com%2Fvercel%2Fexamples%2Ftree%2Fmain%2Fedge-middleware%2Fab-testing-statsig&integration-ids=oac_NAO87zzp3ADxj2ZUh3vikLip&env=STATSIG_SERVER_API_KEY%2CNEXT_PUBLIC_STATSIG_CLIENT_KEY%2CSTATSIG_CONSOLE_API_KEY%2CEDGE_CONFIG%2CEDGE_CONFIG_ITEM_KEY&envDescription=Statsig+API+keys+and+Edge+Config+settings&envLink=https%3A%2F%2Fdocs.statsig.com%2Fguides%2Ffirst-feature&demo-image=%2F%2Fimages.ctfassets.net%2Fe5382hct74si%2F3iWLIPxEQc7e5plRHDW5Nd%2Fdf781629a2e72f6ae5d05879787c4c79%2Fvercel_statsig.png"
---

# Experimentation with Statsig

Reduce CLS and improve performance from client-loaded experiments at the edge with Statsig

---
name: Experimentation with Statsig
slug: ab-testing-statsig
description: Reduce CLS and improve performance from client-loaded experiments at the edge with Statsig
framework: Next.js
useCase:
  - Edge Config
  - Edge Middleware
  - Documentation
css: Tailwind
deployUrl: https://vercel.com/new/clone?repository-url=https%3A%2F%2Fgithub.com%2Fvercel%2Fexamples%2Ftree%2Fmain%2Fedge-middleware%2Fab-testing-statsig&project-name=ab-testing-statsig&repository-name=ab-testing-statsig&integration-ids=oac_NAO87zzp3ADxj2ZUh3vikLip&env=STATSIG_SERVER_API_KEY,NEXT_PUBLIC_STATSIG_CLIENT_KEY,STATSIG_CONSOLE_API_KEY,EDGE_CONFIG,EDGE_CONFIG_ITEM_KEY&envDescription=Statsig%20API%20keys%20and%20Edge%20Config%20settings&envLink=https%3A%2F%2Fdocs.statsig.com%2Fguides%2Ffirst-feature
demoUrl: https://edge-ab-testing-statsig.vercel.app
relatedTemplates:
  - ab-testing-google-optimize
  - ab-testing-simple
---

# Experimentation with Statsig

This example shows how to do experimentation using Statsig, leveraging Edge Config and Edge Middleware.

## Demo

https://edge-ab-testing-statsig.vercel.app

## How to Use

You can choose from one of the following two methods to use this repository:

### One-Click Deploy

Deploy the example using [Vercel](https://vercel.com?utm_source=github&utm_medium=readme&utm_campaign=vercel-examples):

[![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/clone?repository-url=https%3A%2F%2Fgithub.com%2Fvercel%2Fexamples%2Ftree%2Fmain%2Fedge-middleware%2Fab-testing-statsig&project-name=ab-testing-statsig&repository-name=ab-testing-statsig&integration-ids=oac_NAO87zzp3ADxj2ZUh3vikLip&env=STATSIG_SERVER_API_KEY,NEXT_PUBLIC_STATSIG_CLIENT_KEY,STATSIG_CONSOLE_API_KEY,EDGE_CONFIG,EDGE_CONFIG_ITEM_KEY&envDescription=Statsig%20API%20keys%20and%20Edge%20Config%20settings&envLink=https%3A%2F%2Fdocs.statsig.com%2Fguides%2Ffirst-feature)

### Clone and Deploy

Execute [`create-next-app`](https://github.com/vercel/next.js/tree/canary/packages/create-next-app) with [npm](https://docs.npmjs.com/cli/init) or [Yarn](https://yarnpkg.com/lang/en/docs/cli/create/) to bootstrap the example:

```bash
npx create-next-app --example https://github.com/vercel/examples/tree/main/edge-middleware/ab-testing-statsig
# or
yarn create next-app --example https://github.com/vercel/examples/tree/main/edge-middleware/ab-testing-statsig
```

#### Set up environment variables

Log in to the [Statsig console](https://console.statsig.com/) and navigate to **Settings -> API KEYS**.
Then, copy [.env.example](https://github.com/vercel/examples/tree/main/edge-middleware/ab-testing-statsig/env.example) to `.env.local` and fill it in with your Client, Server and Console API keys:

```bash
cp .env.example .env.local
```

Install the [Statsig Vercel Integration](https://vercel.com/integrations/statsig) for your project.
Then fill in `.env.local` with the provided Edge Config Connection String and Edge Config Item Key.

Next, run Next.js in development mode:

```bash
npm install
npm run dev

# or

yarn
yarn dev
```

Deploy it to the cloud with [Vercel](https://vercel.com/new?utm_source=github&utm_medium=readme&utm_campaign=edge-middleware-eap) ([Documentation](https://nextjs.org/docs/deployment)).

## Related Templates

### [Blue-Green Deployments on Vercel](https://vercel.com/templates/next.js/blue-green-deployments-vercel)

See how Vercel's Skew Protection feature enables production-ready blue-green deployments with just a few lines of code.

### [A/B Testing Simple](https://vercel.com/templates/next.js/ab-testing-simple)

By A/B testing at the edge, you'll reduce CLS from client-loaded experiments and improve your site's performance with smaller JS bundles.

## Related Integrations

### [Statsig](https://vercel.com/marketplace/statsig)

Performant Feature Flags, Experiments, Analytics, and Log Drains

---

## Additional documentation

The [Vercel Knowledge Base](https://vercel.com/kb) contains guides and answers to common questions about Vercel, including deployment, framework configuration, domains, caching, and troubleshooting.