Reflag

Reflag – Feature‑Flag Management for Modern SaaS

Reflag is a feature‑flagging solution built entirely in TypeScript, designed to help SaaS teams toggle functionality on and off across the full stack—client browsers, React/Vue front‑ends, Node.js back‑ends, and even serverless environments such as Cloudflare Workers. By exposing a single source of truth for flag state, Reflag removes the need to deploy code changes every time you want to enable or disable a feature, thereby reducing risk and accelerating experimentation.

The core value of Reflag lies in its developer‑first SDKs. Each SDK (React, Vue, Browser, Node.js) provides a lightweight API that integrates seamlessly with existing frameworks. For example, the React SDK exposes hooks that return the current flag value and automatically re‑render components when a flag changes. In server‑side contexts, the Node.js SDK can be used in Express or NestJS applications to gate routes, or within Cloudflare Workers to conditionally serve content. The Browser SDK allows plain JavaScript sites to consume flags without a framework, making Reflag versatile across legacy and modern codebases.

Reflag also offers a CLI for managing flags from the command line, generating TypeScript types to enforce compile‑time safety, and a set of OpenFeature providers. These providers let you plug Reflag into any OpenFeature‑compliant client, giving you a unified experience whether you’re using the browser or server provider. This is particularly useful for teams that already rely on OpenFeature to abstract flag providers, as it keeps Reflag’s logic isolated from business code.

Typical use cases include:

• Feature rollouts: Enable a new dashboard layout to a subset of users while keeping the old version live for others.
• A/B testing: Toggle experimental UI components or backend algorithms without redeploying.
• Operational toggles: Disable a problematic service or endpoint during an outage without affecting the entire system.
• Compliance and regional controls: Show or hide features based on user location, regulatory requirements, or subscription tier.

By integrating Reflag into AI‑assisted workflows—such as a Claude assistant that triggers different response templates or model configurations based on flags—the system can adapt its behavior in real time. For instance, an AI assistant could consult a flag to decide whether to use a newer language model or fallback to a legacy one, all without redeploying the assistant’s code.

What sets Reflag apart is its end‑to‑end TypeScript support and the tight coupling with OpenFeature. This combination delivers type safety, rapid integration, and a consistent API surface across all platforms, making it an attractive choice for developers who need reliable, flexible feature‑flag management in a rapidly evolving SaaS landscape.