86.5% accuracy. ~$0.07 per session. See how Redis stacks up in the Agent Memory Benchmark.

Read the report
Redis IrisRedis Iris
Platform
Platform
Redis IrisReal-time context for agents Redis LangCacheSave on tokens for common questionsRedis Context RetrieverLeverage context from anywhereRedis Agent MemoryAgentic memory for consistent experiencesRedis Data IntegrationCDC across your structured data Redis FlexMore data, more speed, less costCachingSub-ms read/write at scaleStreamingEvent-driven messaging & data pipelinesSession managementFast, persistent storage for sessions SearchSearch & query for structured dataFeature storeReal-time ML feature pipeline for apps & agents
Get RedisDownloads
Deploy
Deploy
Redis CloudFully managed, fully flexibleRedis SoftwareOn-premRedis open source frameworkRedis 8.8PricingLet’s talk numbersRedis on AWSBuy with cloud commitsAzure Managed RedisMicrosoft-supported RedisRedis on Google CloudRedis from the marketplace
Tools
Redis InsightUI to visualize, query, & debugRIOTGet data into Redis from anywhereClient librariesPython, Node, Java, Go, .Net, & moreSDKsConnect Redis to your apps
Get RedisDownloads
Solutions
AI & ML Apps
Scale agent & agentic systems Everything you need to be successful RAGUnderstand how Redis powers RAGSemantic searchRight answers, right nowMLLeverage your features, fastToken optimizationAll the AI without all the costAI cost optimizationControl AI costs without compromise
Core Workloads
Fraud detectionStop fraud, protect customersReal-time decisionsAct on data in real timeCaching & performanceOur bread & butter Real-time messagingStreams at the speed of thoughtSession managementConsistent experiences everywhereLeaderboardsKnow who’s winning
Industries
Financial servicesE-commerce & retailGamingHealthcareTelco
Get RedisDownloads
Devs
Docs
Redis CloudThe nitty grittyWelcome to the communityJoin the largest open source community in cacheDev HubAll the tools to build
Training
UniversityBecome a Redis expertTutorialsHow-to for whatever you’re trying to doQuick startsGo 0 to 1: Redis fastKnowledge baseGet support
Learning
BlogAll the wordsResource centerEverything you need, in one placeDemo centerAnything & everything, in actionReference architecturesNo guessing, just deploy
Resources
Customers
Resource Center
Events
Virtual & live eventsCome say hello
Partners
Find a partnerAWSGoogleMicrosoft
Learn how to BuildVisit our dev hub
Try RedisBook a meeting
Back

Tutorial

Ruby and Redis

February 26, 20262 minute read
TL;DR:
Install the redis gem (gem install redis), create a connection with Redis.new, and call methods like set and get to store and retrieve data.
Use Redis with Ruby via the redis-rb gem. This tutorial walks you through installation, connecting to a Redis server, and performing basic operations so you can integrate Redis into your Ruby applications.

#What you'll learn

  • How to install and configure the redis-rb gem
  • How to connect a Ruby application to a Redis server
  • How to run basic Redis commands from Ruby
  • Where to find example apps built with Ruby on Rails and Redis

#Prerequisites

  • Ruby 2.7+ installed (check with ruby -v)
  • Bundler for dependency management (gem install bundler)
  • A running Redis server (see the Redis quick-start tutorial for setup options)

#How do I start a Redis server?

You can run Redis locally, in Docker, or in the cloud. The Redis quick-start guide covers every option in detail.
Once Redis is running, verify the connection with the CLI:
By default Redis listens on port 6379. You can change this in your Redis configuration file. If you have authentication enabled, the CLI will prompt for a password.

#How do I install redis-rb?

You can install the redis-rb gem directly:
Or add it to a Gemfile for use with Bundler:
Then run:
Verify the installation:
You should see output confirming the gem version and its source repository at github.com/redis/redis-rb.

#How do I connect to Redis from Ruby?

Create a connection using Redis.new and start issuing commands:
Replace host, port, and db with the values for your Redis instance. You can test this by saving the snippet as connect.rb and running:
To confirm the commands reached Redis, open a second terminal and run MONITOR:

#Ruby on Rails example apps

#Rate-limiting app

Screenshot of a rate-limiting demo application built with Ruby on Rails and Redis
Rate-limiting app built in Ruby on Rails — demonstrates how to use Redis to throttle requests.

#Leaderboard app

Screenshot of a leaderboard demo application built with Ruby on Rails and Redis
Leaderboard app built in Ruby on Rails — shows how to implement sorted-set-backed rankings.

#Next steps

View as Markdown