Redis vs Hazelcast: Head-to-Head Comparison

Quick Verdict

Redis is the better pick for versatile caching with rich data structures. Hazelcast is the better pick for Java applications needing distributed caching and compute.

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At a Glance

Feature	Redis	Hazelcast
Best For	Versatile caching with rich data structures	Java applications needing distributed caching and compute
Pricing	Free open source; paid managed cloud	Free community edition; paid enterprise
Free to Start	Yes	Yes
License	Open source	Open-core
Deployment	Self-hosted or managed cloud	Self-hosted or managed cloud
Link	Visit Redis	Visit Hazelcast

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Detailed Breakdown

Redis

In-memory data store for caching, queues and more

Pros:

• Rich data structures
• Persistence and replication
• Huge ecosystem

Cons:

• 2024 license change led to community forks
• Memory-bound costs

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Hazelcast

Distributed in-memory computing platform

Pros:

• Distributed data structures
• Stream processing
• Strong Java integration

Cons:

• Heavier than simple caches
• Enterprise features are paid

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Key Differences

• Positioning: Redis — in-memory data store for caching, queues and more. Hazelcast — distributed in-memory computing platform.
• Licensing differs: Redis is open source while Hazelcast is open-core.
• Pricing: Redis — free open source; paid managed cloud. Hazelcast — free community edition; paid enterprise.
• Signature strength: Redis — rich data structures. Hazelcast — distributed data structures.

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Frequently Asked Questions

Is Redis better than Hazelcast?

It depends on your requirements. Redis is a strong fit for versatile caching with rich data structures, while Hazelcast suits Java applications needing distributed caching and compute.

Is Redis free to use?

Yes, you can start with Redis for free. Pricing model: Free open source; paid managed cloud.

Is Hazelcast free to use?

Yes, you can start with Hazelcast for free. Pricing model: Free community edition; paid enterprise.

Can I self-host Redis or Hazelcast?

Redis can be self-hosted. Deployment options: self-hosted or managed cloud. Hazelcast can be self-hosted. Deployment options: self-hosted or managed cloud.

What are the main drawbacks of Redis and Hazelcast?

Redis: 2024 license change led to community forks; memory-bound costs. Hazelcast: heavier than simple caches; enterprise features are paid.