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Hazelcast Platform vs Oracle Coherence comparison

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Comparison Buyer's Guide

Executive Summary

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Categories and Ranking

Hazelcast Platform
Ranking in In-Memory Data Store Services
6th
Average Rating
8.0
Number of Reviews
1
Ranking in other categories
No ranking in other categories
Oracle Coherence
Ranking in In-Memory Data Store Services
3rd
Average Rating
7.8
Reviews Sentiment
5.8
Number of Reviews
31
Ranking in other categories
Database Development and Management (9th)
 

Mindshare comparison

As of September 2026, in the In-Memory Data Store Services category, the mindshare of Hazelcast Platform is 10.6%, up from 4.1% compared to the previous year. The mindshare of Oracle Coherence is 7.3%, down from 12.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.
In-Memory Data Store Services Mindshare Distribution
ProductMindshare (%)
Oracle Coherence7.3%
Hazelcast Platform10.6%
Other82.1%
In-Memory Data Store Services
 

Featured Reviews

PM
Director of Engineering at Visa
Distributed caching has reduced latency and now supports real-time stream processing
I think there are areas where Hazelcast Platform can improve, such as simplifying the cluster topology and sizing rules because they are still somewhat complex for someone new to Hazelcast. Understanding how the cluster topology forms and sizing rules work, such as partition balancing and traffic routing, should be much simpler. If one node has less RAM or a slightly slower CPU, it creates a cluster-wide performance bottleneck, which is critical, especially with transactional systems. Even though Hazelcast Platform has proven to be better, there can still be bottlenecks if the cluster topology and data partitioning are not easily understood. I also think that object handling and streamlined serialization should be prioritized; using standard Java serialization can be extremely slow. Providing native ultra-fast binary serialization out of the box, without requiring developers to write custom adapters, would be a significant improvement. It would be great if there were ready-to-use adapters for streamlined serialization and object handling.
SS
Data Engineer at a financial services firm with 10,001+ employees
Facilitating real-time business insights with enhanced data querying
Coherence is beneficial due to its multi-indexing to the same object and filtering based on data attributes within the object, followed by aggregation. These features facilitate querying data with multiple keys rather than just a single key. Its real-time data processing capabilities provide insights for business decisions with up-to-date information.

Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Pros

"There have definitely been a lot more latency reductions and better SLA performance since using Hazelcast Platform, resulting in faster time to market overall for new features and capabilities because the architecture has become simpler."
"In my experience, while working on customers’ solutions where performance is a key requirement, along with robustness and stability needs, I have always found Oracle Coherence as the best solution for integrating with different Oracle products and caching data for application-specific needs."
"Technical support from Oracle is okay."
"This product helped our organization to focus on implementing business logic without worrying about scalability on user loads of huge data queries."
"Space consumption is much less."
"Coherence allows linear on-line scalability across multiple commodity servers."
"Coherence absolutely outperforms others in terms of scalability, reliability, and performance."
"Coherence has improved response times for queries of sizeable data sets, and by allowing for data distribution and replication through clustering, it improves the reliability of information systems."
"Since we implemented Coherence, this data is in memory all the time; so the results are found in milliseconds instead of five seconds."
 

Cons

"If one node has less RAM or a slightly slower CPU, it creates a cluster-wide performance bottleneck, which is critical, especially with transactional systems."
"It is very expensive. It might not work well for small business people."
"We have encountered the occasional minor bug and very occasional more serious bug."
"The price is high. I believe there should be a cheaper version for only the caching solution."
"It is very easy to set up a basic topology, but hard to configure and tune to make it really work."
"Complexity being a huge contributor to risk/cost for projects, I am more likely to use other products as a result."
"Would be good if the initial setup was easier."
"OSB could be tuned to do things like Apigee."
"Initial setup is very complex; specifically, a lot of XML effort is required."
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Top Industries

By visitors reading reviews
No data available
Financial Services Firm
25%
Outsourcing Company
12%
Computer Software Company
6%
Comms Service Provider
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
By reviewers
Company SizeCount
Small Business5
Midsize Enterprise3
Large Enterprise23
 

Questions from the Community

What needs improvement with Hazelcast Platform?
I think there are areas where Hazelcast Platform can improve, such as simplifying the cluster topology and sizing rules because they are still somewhat complex for someone new to Hazelcast. Underst...
What is your primary use case for Hazelcast Platform?
My main use case for Hazelcast Platform is to build distributed cache systems across different services that we have. The biggest use is the caching. Additionally, from time to time, we use this fo...
What advice do you have for others considering Hazelcast Platform?
My advice for others looking into using Hazelcast Platform is to study the architecture and data modeling thoroughly. Choosing the right topology for the application or platform is crucial when usi...
What needs improvement with Oracle Coherence?
The WebLogic Management is quite cumbersome. The initial setup is complex and time-consuming.
What is your primary use case for Oracle Coherence?
I utilize Coherence for data solutions in the financial industry. Its primary use case includes plain lookup, indexing, filtering, and aggregation.
What advice do you have for others considering Oracle Coherence?
I recommend Coherence, as I don't have any product issues. The main concerns are high pricing and a complex initial setup. Overall, I would rate Coherence as an eight out of ten.
 

Also Known As

No data available
Coherence
 

Overview

 

Sample Customers

British Gas, Airbus Defense, Ellie Mae, Gamesys
Industrial Bank of Korea, Hotelbeds, Canon Inc., Verizon, Securitas Direct Espa_a, S.A.U., CetelemEspa_aGrupo BNP Paribas, Telus
Find out what your peers are saying about Redis, Amazon Web Services (AWS), Oracle and others in In-Memory Data Store Services. Updated: September 2026.
913,683 professionals have used our research since 2012.