Memcachedvs
Redis
Redis: The richer alternative with persistence, replication and data structures, and the usual default today
Overview
What Memcached does
Memcached is a distributed memory object caching system, built to reduce database load by holding results of expensive queries and API calls in RAM. It was created for LiveJournal in 2003 and remains in production at very large scale. It is defined by what it refuses to do. There is no persistence, no replication, no data structures beyond simple key-value, and no clustering logic on the server — clients decide which node holds which key. That refusal is why it is fast, predictable and almost maintenance-free, and why Redis displaced it wherever more than caching was needed.
What people use it for
- Caching expensive database query results to cut load
- Session storage where losing sessions on restart is acceptable
- Fronting an API whose responses are costly and change slowly
Related searches
The honest half
Where it falls short
Concrete and checkable, so you can decide whether any of them matter to you. This is the half of a review a vendor will not write about Memcached.
- No persistence at all: restart a node and its cache is gone, which every design must assume
- No replication or failover, so losing a node loses that share of the cache
- Only simple key-value, with none of the lists, sorted sets or streams Redis offers
- Values are capped at 1MB by default, which surprises teams caching large documents
Cross-shopped
What people choose instead of Memcached
Each pairing was judged by two reviewers asking whether a buyer would genuinely weigh the two against each other. The ones that failed were deleted rather than published.
Pricing
What Memcached costs
Taken from the vendor's own pricing page. Prices move, so check before you buy.
Memcached
Free
- Full functionality
- Self-hosted
- No usage limits
Capabilities
Features
In-memory key-value cache
Simple get and set against RAM, with LRU eviction
Multithreaded
Uses multiple cores on a single node, unlike some single-threaded alternatives
Client-side sharding
Servers stay independent; clients distribute keys across the pool
Predictable memory use
Slab allocation with a fixed memory ceiling per node
Answered, with sources
Questions people ask
Each answer names the page it came from, so you can check it rather than take our word for it.
Is Memcached free?
Yes, open source with no licence fee.
Memcached or Redis?
Memcached is a pure cache: simpler, multithreaded and very predictable. Redis adds persistence, replication and rich data structures, which is why it is the default choice unless you specifically want a cache and nothing more.
Does Memcached persist data?
No. Everything is in memory and lost on restart, by design.
Keep looking
Where to go from Memcached
- Memcached alternativesEvery product people weigh against it
- Memcached pricingPlans, floors and what the tiers exclude
- Memcached badgesWhich rules it meets, and the figure behind each
- All Databases softwareThe full category
- Best Databases softwareThe shortlist, and how it was cut
Best Databases software for
Compare Memcached with
- Cockroach Labs
- PostgreSQL
- Airtable
- Amazon Aurora
- Elasticsearch
- Apache Kafka
- PlanetScale
- Meilisearch
- Turso
- Azure SQL
- ClickHouse
- Couchbase
- DuckDB
- MariaDB
- Oracle Database
- DataGrip
- Firebolt
- Google Cloud SQL
Other Databases software
The cloud-native distributed SQL database
The world's most advanced open source relational database
Create apps that perfectly fit your team's needs
MySQL and PostgreSQL-compatible relational database built for the cloud
The heart of the Elastic Stack for search and analytics
Open-source distributed event streaming platform
The MySQL-compatible serverless database
Fast open-source search engine built for typo tolerance
The Database for the Age of AI Agents
Intelligent, scalable cloud database service from Microsoft
Fast open-source column-oriented database for real-time analytics
The modern database for enterprise applications
Fast in-process analytical database
The open source relational database for the enterprise
The world's most complete, reliable, and secure database
Cross-platform database IDE from JetBrains for SQL and NoSQL databases
Sub-second analytics at cloud data warehouse scale
Fully managed relational database service for MySQL, PostgreSQL, and SQL Server
Softwr does not host reviews and shows no star rating for Memcached, because a rating we did not collect is not ours to publish. What is here is the pricing and platform detail from the vendor’s own pages, limitations we could state concretely, and alternatives a reviewer confirmed people weigh against it. Tell us if any of it is wrong.
More on Memcached
Memcached alternatives
What people switch to, and what they give up
Memcached pricing
Every tier, and where the cost actually lands
Compare Memcached
Put it head to head with anything we hold
Memcached badge
Its rating, and an embed for your own site
Best Databases software alternatives
Enterprise search platform built on Apache Lucene
High-performance messaging system for cloud-native applications
Kafka-compatible streaming platform with no ZooKeeper or JVM
Open-source message broker supporting AMQP and other protocols
Open-source search and analytics suite forked from Elasticsearch
Cloud-native messaging and streaming with separated storage
Stateful stream processing at scale