Rollout

Judgement

What it is

Building block

What it does

A small Ruby library for feature flags by user, group or percentage, stored in Redis.

Adopt it when

Your Ruby app already uses Redis and you want very simple flags.

Watch out

Minimal features and no UI; Flipper suits most new Rails projects better.

Ready for

Production-ready

Runs as

Library

Built with

Ruby and Redis

How established

Established: started 16 years ago, latest release rollout/v3.3.0.

What the license allows

You can build it into a product you sell, as long as you keep its copyright notice.

Judged on 2026-11-03 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

Follow it down: Rollout → Ruby → GCC → LLVM project → runs on a microchip

How compilers were built, back to punched paper tape

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