Introduction

Featsync is a simple feature flag service built for indie hackers and small startups. We focus on the 20% of features that cover 80% of use cases.

Why Feature Flags?

Feature flags let you:

Ship code without releasing features - Deploy to production anytime, enable features when ready
Roll back instantly - Something broken? Toggle it off. No redeploy needed.
Test in production - Enable features for specific users or a percentage of traffic
Decouple deploys from releases - Your release schedule is no longer tied to your deploy schedule

Why Featsync?

Simple

Boolean flags and percentage rollouts. That’s it. No complex targeting rules or user segments.

Affordable

Start free with 5 flags. Pro is $19/month with unlimited team members. No per-seat pricing.

Fast

Edge-cached evaluations with sub-50ms response times globally. SDK caches locally for resilience.

Safe

Even if our API goes down, your app keeps working with cached flag values.

What Featsync is NOT

We intentionally don’t include:

Complex user targeting - No “users in California who signed up after January”
User segmentation - No creating user groups based on attributes
A/B testing analytics - Use your existing analytics tool
Multi-variate flags - Just boolean on/off and percentage rollouts

If you need these features, you might need LaunchDarkly or Statsig. We’re intentionally simpler.

Next Steps

Ready to get started?

Quick Start - Get up and running in 5 minutes
Your First Flag - Create and use your first feature flag
SDK Installation - Detailed installation guide