Databases · Updated 2026
Quick Verdict
Choose Redis if you need an ultra-fast, in-memory data store for caching, real-time features, or message brokering. Choose PlanetScale if you need a scalable, serverless, and fully-managed MySQL-compatible database for your primary application data.
Redis and PlanetScale serve fundamentally different database roles. Redis is an in-memory key-value store and message broker optimized for sub-millisecond data access, while PlanetScale is a serverless, horizontally scalable platform for persistent MySQL data. Redis is open-source and free, whereas PlanetScale is a commercial, managed service. Their target audiences differ: Redis targets developers needing low-latency data layers, while PlanetScale targets teams building scalable web apps with a Git-based schema workflow.
Side-by-Side Comparison
| Aspect | Redis | PlanetScale |
|---|---|---|
| Pricing | Open Source and free | Commercial, starting at $39/month |
| Ease of Use | Simple to deploy, but operational overhead for clustering | Fully managed with a developer-focused CLI and UI |
| Scalability | Excellent vertical scaling; horizontal scaling requires Redis Cluster | Built for horizontal, serverless scaling via Vitess |
| Integrations | Extensive client libraries, often used alongside primary databases | MySQL-compatible, works with any MySQL driver or ORM |
| Open Source | Yes | No (core Vitess is open source, platform is proprietary) |
| Best For | Caching, real-time apps, session storage, message brokering | Scalable web apps, primary SQL database, Git-based schema changes |
Choose Redis if...
Redis is the better choice when your primary need is an ultra-low-latency cache, session store, or real-time pub/sub message broker. It is ideal for enhancing application performance or enabling real-time features where speed is the critical requirement, and its open-source nature offers maximum flexibility.
Choose PlanetScale if...
PlanetScale is the better choice when you need a scalable, highly available, and MySQL-compatible database for your core application data. It is ideal for teams that want a serverless operational experience, zero-downtime schema deployments, and a Git-like workflow for managing database changes.
Product Details
Redis
An open source, in-memory data structure store used as a database, cache, and message broker.
Pricing
Open Source
Best For
Developers and organizations needing sub-millisecond latency for real-time applications, caching, session management, and message brokering.
Key Features
Pros
- + Extremely low latency and high throughput
- + Versatile with support for many data structures and use cases
- + Simple, well-documented API and large ecosystem
Cons
- - Primarily in-memory, so dataset size is limited by RAM cost
- - Persistence is optional and can be complex to tune for durability
- - Advanced clustering and management features require commercial support or expertise
PlanetScale
A serverless database platform powered by Vitess, offering MySQL compatibility with a developer-friendly workflow.
Pricing
$39/mo
Best For
Development teams and companies building modern, scalable web applications who need a highly available, MySQL-compatible database with a Git-like workflow for schema changes.
Key Features
Pros
- + Exceptional developer experience with database branching
- + True horizontal scalability via Vitess
- + No downtime for schema migrations
Cons
- - Limited to MySQL wire protocol (no other database engines)
- - Can be more expensive than basic managed MySQL services
- - Advanced sharding configuration requires enterprise plan