I built Lux because Redis is single-threaded and hasn't changed architecturally since 2009. Lux uses a sharded concurrent architecture in Rust with per-shard reader-writer locks, zero-copy RESP parsing, and pipeline batching. It speaks RESP natively so every Redis client works unchanged. We benchmarked against Redis 7, Valkey 9, and KeyDB with redis-benchmark (50 clients, 1M requests) - full results in the README. The Docker image is ~1MB on ARM. MIT licensed, no plans to change that. If you don't want to self-host, there's managed hosting at luxdb.dev. Happy to answer questions about the architecture or benchmarks.