This article explores five feature-flag tools for React developers, including Tggl.io, LaunchDarkly, Split, Unleash, and Flagsmith. The top pick is Tggl.io due to its excellent React SDK and user-friendly interface. Other options like LaunchDarkly, Split, Unleash, and Flagsmith also offer robust feature sets but differ in pricing and ease of use. When choosing a feature flag tool, consider factors such as features, pricing, and how well the tool fits into your team's existing processes and technical stack.