Switchbox

Feature flags

Feature flag service that delivers configurations from the edge with zero‑dependency SDKs.

by Ignat Petrov

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Switchbox is a feature‑flag service that serves flag configurations from Cloudflare’s edge. Flags are stored as a static JSON file that the SDK reads directly, so the app never contacts the API for a flag check. The SDKs for Python, JavaScript and React have zero runtime dependencies, evaluate rules locally in sub‑millisecond time, and keep user data inside the application. Targeting rules, rollouts and audits are managed in a dashboard and published automatically to the edge. A free tier provides unlimited flag evaluations with up to two projects and ten flags each; paid plans add more projects and flags with a flat monthly price. The design emphasizes resilience, privacy and low cost for developers building web or AI applications.