Ruvio is a Redis-compatible in-memory database that folds the cache, the lock service, the rate limiter, and the delay queue into one Rust process your existing clients already speak to. Connect with redis-cli or the first-party clients for Rust, .NET, Go, Java, Python, and Node.js, and the familiar strings, hashes, lists, sets, sorted sets, and streams are there, 287 commands in all. The difference shows in the primitives that usually need a second system: LEASE grants a fencing token for a key, SEMAPHORE caps concurrent holders with per-holder TTLs, INCRBY with MAX builds a counter that refuses to pass capacity, SETV writes only when your version is still current, CHANGES arms a feed of later writes on a shard, and XADD DELAY stores a stream entry now and reveals it to consumer groups when the delay passes. Each shard owns its keys outright, parsing, recording, and applying without a lock on the hot path, and features cost memory only on keys that use them. Durability is a startup choice you name, memory, snapshot, everysec, or always, written through a write-ahead log, and replicas copy shard by shard while optional coordinators agree through Raft to promote a replica when a primary stops answering. A browser operator UI shows data, command forms, Pub/Sub, and ACL users on the running server. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.