Built for developers. Loved by product teams.

Feature flag management with product intelligence, a plugin ecosystem, and the developer experience you deserve.

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terminal
$ npm install @flagbridge/sdk-node
$ flagbridge init --project my-app
✓ Connected to FlagBridge
✓ 3 flags synced
$ flagbridge toggle checkout-v2 --env production --on
✓ checkout-v2 is now ON in production

From zero to feature flags in 5 minutes

1

Install

docker compose up -d

Self-hosted in seconds with Docker

2

Create a flag

POST /api/v1/projects/
my-app/flags

REST API or web dashboard

3

Evaluate

const enabled = 
  fb.isEnabled('flag')

Simple SDK integration

SDKs for every stack. OpenFeature from day one.

Native SDKs for all major languages with full OpenFeature support. Type-safe, tested, and built for production.

Node.jsGoPythonReactOpenFeature
import { FlagBridge } from '@flagbridge/sdk-node';

const fb = new FlagBridge({
  apiKey: process.env.FLAGBRIDGE_KEY
});

const enabled = await fb.isEnabled('checkout-v2', {
  userId: user.id
});

E2E testing? We've got you.

Isolated test sessions for deterministic E2E tests.

Scoped overrides
No interference between tests
Playwright & Cypress helpers
Built into the SDK
Auto-cleanup with TTL
Sessions expire automatically (Pro)
typescript
const session = await fb.testing.createSession({
  environment: 'staging',
  ttl: '30m',
  overrides: {
    'checkout-v2': true,
    'payment-method': 'pix-only',
  },
});
CEPro

REST API

Evaluate
GET /api/v1/evaluate/:key
Testing
POST /api/v1/testing/sessions
Webhooks
POST /api/v1/webhooks
Flags
GET /api/v1/projects/:id/flags
Integrations
GET /api/v1/integrations

Webhooks & Events

{
  "event": "flag.toggled",
  "timestamp": "2026-03-25T10:30:00Z",
  "data": {
    "flagKey": "checkout-v2",
    "environment": "production",
    "enabled": true,
    "triggeredBy": "alice@example.com"
  }
}

9 event types · HMAC signed · 5 retries with backoff

Send flag data where it matters.

Managed connectors push evaluation events to your analytics and observability stack.

📊Pro

Mixpanel

Track flag evaluations as events

📧Pro

Customer.io

Sync flags to user attributes

📈Pro

Amplitude

Experiment tracking & analysis

🔄Pro

Segment

Route events to any destination

🐕Pro

Datadog

Observability & monitoring

💬Pro

Slack

Real-time flag change alerts

Build plugins. Reach thousands. Get paid.

🔌

Powerful SDK

Full access to the platform API and UI extensions

👥

Built-in audience

Reach thousands of teams using FlagBridge

💵

You keep 80%

Fair revenue share for plugin developers

json
{
  "name": "my-plugin",
  "version": "1.0.0",
  "hooks": ["flag.created", "flag.toggled"],
  "permissions": ["flags:read", "webhooks:write"],
  "ui": {
    "settings": "./settings.tsx",
    "dashboard": "./widget.tsx"
  }
}
$ npx @flagbridge/cli create-plugin

✓ Plugin scaffolded
✓ Dev server running on :3001
✓ Hot reload enabled

→ Edit src/index.ts to get started

Why engineering teams switch

🏗️

Self-hosted, your rules

Run on your infrastructure with Docker Compose. Full control over your data and deployment.

💰

Flat-rate pricing

$29/mo vs $72k/yr with other vendors. No seat limits, no usage caps, no surprises.

🔓

OpenFeature native

Zero vendor lock-in. Switch providers without changing code. Standards-first approach.

🧪

Test-friendly by design

Isolated sessions, SDK helpers for Playwright & Cypress. E2E tests that actually work.

Join the community

GitHub

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Join the community

Documentation

Complete guides

Blog

Latest updates

YouTube

Video tutorials

Public Roadmap

What we're building

Ready to bridge the gap?

Start shipping features with confidence. Self-host or use our cloud.