Before Big-bang feature rollouts After Controlled, gradual rollouts About Upserve For over 7,000 restaurants nationwide, Upserve (formerly Swipely) is an essential part of running a smooth operation. Managing 11 million meals per month and relationships with 16 million active diners, Upserve is "the magic ingredient" for a growing number of restaurateurs. The smart management assistant that puts everything restaurateurs need to know in one place, Upserve provides real- time guidance that empowers local restaurants to unlock their full potential. Challenge Before using feature flags, Upserve had a system they used for previewing new features using hidden pages they called dark urls. This worked for basic previews for entirely new features, but otherwise had downsides. This technique did not

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