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Redis vs Memcached

15. 02. 2025 1 min read intermediate

Redis is more powerful, Memcached is a simpler pure cache.

Redis

  • Data structures (strings, lists, sets, sorted sets, hashes)
  • Persistence (RDB, AOF)
  • Pub/Sub, Streams
  • Lua scripting
  • Cluster and Sentinel
  • Single-threaded (per command atomic)

Memcached

  • Key-value only (strings)
  • No persistence
  • Multi-threaded
  • Simpler, less memory per key
  • No advanced features

When to Use Which

  • Redis — sessions, leaderboards, queues, rate limiting, pub/sub + cache
  • Memcached — pure caching, simple key-value, multi-threaded advantage

Redis for 95% of Use Cases

Redis is more versatile. Memcached only for pure caching of large volumes.

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