What is the main difference between Redis and Memcached?

Redis is a feature-rich in-memory data structure store supporting strings, hashes, lists, sets, sorted sets, streams, pub/sub, Lua scripting, and optional persistence. Memcached is a simpler, distributed memory caching system optimized purely for key-value caching with no persistence.

When should I use Redis vs Memcached?

Choose Redis for most modern applications — it handles caching, sessions, queues, pub/sub, leaderboards, and more in a single system. Choose Memcached for high-throughput simple caching at very large scale where its simpler architecture and multi-threading can offer marginal advantages.

Does Redis have persistence unlike Memcached?

Yes. Redis supports two persistence modes: RDB (point-in-time snapshots) and AOF (append-only file logging). Memcached is purely in-memory with no persistence — data is lost on restart. Redis persistence makes it suitable for use cases beyond pure caching.

Free Tool · GitHub Archive · 30-day data

Redis vs Memcached Comparison

Redis vs Memcached: data structures, persistence, clustering, and when simple-cache still wins. GitHub adoption and the right pick.

redis/redis Redis Recent public evaluation signal

memcached/memcached Memcached Recent public evaluation signal

Redis vs Memcached: which should you choose?

Redis and Memcached are both excellent for caching, but Redis’s richer data structures and persistence options make it the default for most new projects. Real evaluation signals show where developer activity is concentrated.

A higher intent score means more developers are actively testing, forking, and contributing to that project right now. It’s the closest proxy we have to “which is gaining traction” without access to private usage data.

How the comparison works

This tool surfaces real developer evaluation activity from the last 30 days — PRs opened, issues filed, forks, and code pushes from non-team contributors. We run the same GitHub Archive query for both repos simultaneously (results cached 24h per repo), weight PRs (50%), issues (30%), and forks (20%) over stars, filter bots, and produce a 0–100 intent score. See the winner, score gap, and which developers are evaluating.

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Start with developers already showing intent.

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