Redis is an in-memory key-value data store used for caching, session storage, queues, and real-time features, prized for its speed. It supports rich data structures beyond simple key-value.
MySQL is a widely used open-source relational database that powers a huge portion of the web, known for speed, reliability, and broad hosting support. It remains a default for many web applications and CMSes.
Open source; Redis Cloud managed plans available.
Free community edition; paid enterprise editions available.
- Extremely fast
- Versatile data structures
- Great for caching
- Widely supported
- Extremely widely supported
- Fast for reads
- Huge community
- Free community edition
- In-memory means RAM cost
- Persistence needs configuration
- Not a primary relational store
- Fewer advanced features than Postgres
- Licensing nuances (Oracle-owned)
- Some prefer MariaDB fork
What reviewers say
Redis Reviews
4.7 (3)Great database
Redis has been part of our stack. Widely supported. Minor gripe: persistence needs configuration. Would recommend.
Solid choice
Been using Redis for a while. Versatile data structures. No real complaints. Would recommend.
Recommend Redis
Been using Redis for a while. Widely supported. No real complaints. Would recommend.
MySQL Reviews
4.5 (4)Great database
Tried MySQL recently. Extremely widely supported. Minor gripe: fewer advanced features than postgres. Would recommend.
Great database
Been using MySQL for a while. Huge community. No real complaints. Would recommend.
Solid choice
Been using MySQL for a while. Fast for reads. Minor gripe: some prefer mariadb fork. Would recommend.
More alternatives & similar tools
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Alternatives to MySQL
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The Verdict
AI-generated from listing dataMySQL is the safer default for traditional relational workloads, while Redis trades durability for sub‑millisecond in‑memory speed.
Key differences
- •Data model: MySQL is a relational SQL database; Redis is a NoSQL in‑memory key‑value store with rich structures.
- •Persistence: MySQL always persists to disk; Redis requires optional configuration and is primarily RAM‑based.
- •Primary use case: MySQL excels at structured queries and ACID transactions; Redis excels at caching, real‑time messaging, and session storage.
- •Performance profile: MySQL offers fast reads but higher latency than Redis’s sub‑millisecond in‑memory ops.
- •Feature depth: MySQL provides replication, clustering, and mature SQL tooling; Redis provides pub/sub, streams, and advanced data structures.
Pricing & value
Both offer free open‑source editions; paid enterprise options require contacting vendor, so cost advantage is unclear.
Ease of use / learning curve
MySQL uses standard SQL, familiar to most developers; Redis requires learning its command set and data‑structure semantics.
Features & depth
MySQL provides full relational features, ACID compliance, and mature replication; Redis focuses on caching and limited persistence.
Integrations & ecosystem
MySQL’s large ecosystem, tooling, and ubiquitous hosting support outpace Redis’s more niche cache‑oriented integrations.
Scalability
Redis’s in‑memory architecture and clustering enable extremely high throughput and low latency at scale.
Support
Both are open source with enterprise options; neither has specified support details in the facts.
Security & privacy
No specific security features are listed for either product; both are open source and self‑hosted.
Choose Redis if…
Backend developers needing ultra‑fast caching, real‑time messaging, or session storage.
Choose MySQL if…
Web developers needing reliable relational storage, complex queries, or ACID transactions.
Common questions
Which tool is better for persisting critical business data?
MySQL, because it always writes to disk and provides full ACID guarantees, whereas Redis is in‑memory and requires optional persistence.
Can I use Redis as a primary database?
Not recommended; Redis is designed for caching and real‑time use cases, not as a primary relational store.
Do both products have free community versions?
Yes, both MySQL and Redis offer free open‑source editions; enterprise plans require contacting the vendor.