Feature Flags vs. Remote Configuration: What’s the Difference?

Feature flags and remote configuration both modify application behavior without redeployment, but they serve distinct purposes: flags determine whether users experience a feature, typically through boolean, targeted rollout controls, while remote configuration defines persistent values such as rate limits, UI layouts, or JSON settings. The discussion uses major outages attributed to configuration changes, including Google Cloud, CrowdStrike, and Cloudflare, to argue that configuration requires safeguards comparable to release controls, including validation, staged rollout, auditability, and kill switches. Although modern platforms increasingly combine both capabilities through string, numeric, and JSON flag values with targeting rules, teams should distinguish them by intent and lifecycle: feature flags are generally temporary and should be removed after releases, whereas configuration is designed to be updated in place over time. The text also warns that stale flags, interacting toggles, undocumented long-term settings, and client-exposed secrets can increase operational risk, recommending ownership, expiry dates, versioning, cleanup processes, secure server-side evaluation, and schema validation. GrowthBook is presented as a platform supporting both uses through typed feature values, rules, audit logs, stale detection, JSON schemas, dedicated configuration objects, and reusable constants.

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