Valkey vs Redis in 2026: What Is Different and What Breaks When You Switch
Short answer: for a cache or a job queue, Valkey and Redis are the same thing in 2026. Same protocol, same commands, same clients, and on my bench the same speed – within a few percent, and the run-to-run noise was bigger than the gap. The real differences are the licence, the features Redis 8 added on top of the core, and one ugly migration trap: a single stream key written by Redis 8.10 stops Valkey from loading the snapshot or replicating from it.
So pick Valkey if you want a BSD-licensed server run by the Linux Foundation, or your cloud already defaults to it. Pick Redis if you use Redis Query Engine, Time Series, the probabilistic types beyond Bloom, or vector sets, or if you just don't want to think about a migration. If you are on Redis 8 today and want to move, read the migration section first.