Ship features safely
Control what users see without deploying
Deploy code with features off. Enable for 1% of users, then 10%, then everyone. If something breaks, disable instantly—no rollback needed.
Before & after Replane
See how teams transform their workflow
Without Replane
Deploy to enable features
Every feature toggle requires a code change, PR review, and full deployment cycle.
All-or-nothing releases
Features go live for everyone at once. Issues affect 100% of users immediately.
Slow incident response
Disabling a broken feature means emergency rollback—if you can even do it quickly.
Engineering bottleneck
Product managers wait for developers to toggle flags. Simple changes take days.
With Replane
Toggle without deploying
Enable or disable features from the dashboard. Changes propagate in milliseconds.
Gradual rollouts
Start with 1%, increase to 10%, then 100%. Catch issues before they affect everyone.
Instant kill switch
One click disables any feature. No rollback, no downtime, no panic.
Self-service for teams
Product managers control flags directly. Engineers focus on building features.
Ship without stress
Deploy confidently with fine-grained control over every feature
Instant Updates
Changes propagate in under a second via SSE
High Availability
Enterprise-grade reliability with 99.99% uptime
No Deploys Needed
Toggle features from the dashboard without code changes
All Major SDKs
JavaScript, React, Next.js, Svelte, Python, .NET
Three simple steps
Get up and running in minutes, not hours
Define your flag
Create a boolean or percentage-based flag in the Replane dashboard. Set targeting rules if needed.
Check in your code
Use our SDK to check the flag value. Your code stays clean with simple boolean checks.
Enable gradually
Roll out to a small percentage, monitor, then increase. Full control without any deploys.
Why teams choose Replane
Built for developers who value speed, reliability, and control
Zero-risk deployments
Ship code with features disabled. Enable when ready, disable if issues arise. No rollback needed.
Gradual rollouts
Start with 1% of users, increase to 10%, then 100%. Catch issues early with limited blast radius.
Instant updates
Changes propagate in real-time via SSE. No polling, no delays, no cache invalidation.
Works with your stack
Official SDKs for all major languages and frameworks
1import { Replane } from '@replanejs/sdk'23interface Configs {4 'feature-new-checkout': boolean5 'checkout-rollout-percent': number6}78const replane = new Replane<Configs>()910await replane.connect({11 baseUrl: 'https://replane.example.com',12 sdkKey: process.env.REPLANE_SDK_KEY13})1415// Check if feature is enabled16const newCheckoutEnabled = replane.get('feature-new-checkout')1718if (newCheckoutEnabled) {19 renderNewCheckout()20} else {21 renderLegacyCheckout()22}2324// Subscribe to real-time updates25replane.subscribe('feature-new-checkout', (config) => {26 console.log('Feature flag changed:', config.value)27})
Questions about Feature Flags
Common questions and answers
Flag changes propagate to all connected clients within milliseconds via Server-Sent Events (SSE). There's no polling or cache invalidation needed—updates are pushed instantly.
Yes! You can use our evaluation context to target specific users, percentage-based rollouts, or any custom attribute. The SDK supports consistent hashing so users always see the same variant.
Our SDKs cache the last known configuration locally. If the Replane server becomes unreachable, your application continues running with cached values. When connectivity is restored, updates resume automatically.
Every flag change is versioned with timestamp and author. You can view the complete history, compare versions, and rollback to any previous state with one click.
Absolutely! The dashboard is designed for product managers, QA, and operations teams. Role-based access control lets you define who can view, edit, or publish flag changes.
Ready to ship faster?
Start using Replane in minutes. Free forever for self-hosted, or let us manage everything for you.
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