Redis

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Open source (BSD licensed), in-memory data structure store

What is Redis?

Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache, and message broker. Redis provides data structures such as strings, hashes, lists, sets, sorted sets with range queries, bitmaps, hyperloglogs, geospatial indexes, and streams.
Redis is a tool in the In-Memory Databases category of a tech stack.

Who is using it?

6854 companies use Redis in their tech stacks, including Uber, Airbnb, and Pinterest.

Uber

Airbnb

Pinterest

Shopify

Instagram

Twitter

Udemy

LaunchDarkly

Instacart

Slack

Robinhood

reddit

Why developers like Redis

Performance
Super fast
Ease of use
In-memory cache
Advanced key-value cache
Open source
Easy to deploy
Stable
Free