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IBM Db2 Database vs IBM Informix comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Mar 4, 2025

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

IBM Db2 Database
Ranking in Relational Databases Tools
6th
Average Rating
8.2
Reviews Sentiment
6.7
Number of Reviews
75
Ranking in other categories
No ranking in other categories
IBM Informix
Ranking in Relational Databases Tools
21st
Average Rating
8.6
Reviews Sentiment
7.7
Number of Reviews
16
Ranking in other categories
Embedded Database (10th)
 

Mindshare comparison

As of September 2025, in the Relational Databases Tools category, the mindshare of IBM Db2 Database is 7.5%, up from 6.8% compared to the previous year. The mindshare of IBM Informix is 1.9%, up from 1.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Relational Databases Tools Market Share Distribution
ProductMarket Share (%)
IBM Db2 Database7.5%
IBM Informix1.9%
Other90.6%
Relational Databases Tools
 

Featured Reviews

Michael Raz - PeerSpot reviewer
Efficient access path optimization and performance excellence with helpful support
IBM Db2 for zOS serves as the central database for all the core business applications in the two banks I work with. All applications use Db2 as a data server. We fully implement and utilize most of Db2's functionalities and capabilities for core banking business applications IBM Db2 has…
Nazzareno Maria Rezzini - PeerSpot reviewer
Supports multiple business intelligence tools, but the technical support services need improvement
IBM Informix is a central database solution across various environments, supporting multiple applications and business intelligence tools The key areas for improvement revolve around understanding the current customer trends and demands, particularly in software and database requirements. The…

Quotes from Members

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

Pros

"The most valuable feature of the solution is its compatibility with IBM Power Systems."
"The valuable features include access path optimization, excellent performance, a robust locking mechanism, parallelism, and effective buffering in memory."
"The setup process has become much easier recently."
"Very good for performance and scalability."
"When you submit a ticket the response time is quick."
"It is quite a stable solution."
"It is a scalable solution."
"The solution's querying feature is most valuable. It allows me to retrieve data quickly."
"Replication, all levels of replication, query charting, and the MongoDB embedded are the most valuable features of this solution."
"It supports multiple applications and business intelligence tools."
"It supports in-house-built applications in .NET and VB6"
"Every version is faster than the previous."
"This solution has made financial reporting possible by allowing financial people the opportunity to set Informix to "Auto Pilot" so that they can attend other duties."
"Replication is a valuable feature and easy to use."
"The stability is incredible. I have customers with uptimes of several years."
"The most valuable feature is concurrency and locking because my customers usually use databases in OLTP mode. So, for a large number of competitive users. Other features that are well valued are quick large-scale data types. It is better than Oracle."
 

Cons

"Their view of it is they're maintaining it, they're continuing to upgrade it, they're continuing to grow it, however, they don't go out and try and sell that as an architectural solution the way they do Linux and Unix."
"Also, the website could be more intuitive. I didn't find it easy to find documentation on the website."
"The queries can be difficult for beginners because there are so many. I would like to see more use cases for flow analysis that enable us to correlate the flow with events. Adding this feature in a QI format would be good for beginners."
"The solution no longer supports POWER8."
"In terms of improvements, IBM Db2 can improve its interface and its functionality. Also, the embedded functions should be much richer than the current ones - the functions which are embedded in the engine itself."
"The licensing fees can be reduced."
"We just want a bit more integration with Linux. That said, we are already seeing Linux more readily available on the mainframe environment."
"The initial setup could be improved."
"There should be more intelligence surrounding discovering data to be able to automatically create indexes."
"I experienced poor input/output (IO) performance."
"It would be helpful to have IBM salespeople know that Informix exists, and sell it. Currently, it is completely ignored by IBM."
"This solution is in need of more current tools."
"The technical support services need substantial improvement."
"The solution really doesn't add new features very often."
"Continue extending the SQL language for compatibility with the competition's language, including Stored Procedure Language."
"The support team could include local engineers to establish efficient communication. It will help us speed up the escalation process."
 

Pricing and Cost Advice

"The total cost of the solution depends upon the PVU licensing"
"It is expensive. The price depends on the size of the machine on which you are installing the Db2 and the features you are using. It also depends on the country. IBM has different policies and different options for payment for this product."
"Licensing fees are on a yearly basis."
"We normally handle large size businesses and as far as I am aware, the license is negotiable based on the number of users and the quantitative data."
"I would rate the pricing a five out of ten. It's not super expensive, but also not cheap."
"The solution costs less than other products."
"Compared to other databases, Db2 is relatively cheaper."
"There is a license for this solution and we pay every three years."
"I am not aware of the licensing costs or terms."
"For me, it's always too expensive."
"The free edition can be enough to handle moderate-size implementations, but you may want a pay for edition to benefit from more functionality, such as replication."
"The product has reasonable pricing. We purchase its yearly license."
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Top Industries

By visitors reading reviews
Financial Services Firm
20%
Manufacturing Company
10%
Government
9%
Computer Software Company
9%
Financial Services Firm
10%
Computer Software Company
10%
Manufacturing Company
6%
Comms Service Provider
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business20
Midsize Enterprise13
Large Enterprise48
By reviewers
Company SizeCount
Small Business9
Midsize Enterprise2
Large Enterprise7
 

Questions from the Community

What do you like most about IBM Db2 Database?
Db2 database scalability and performance capabilities match our database needs. It covers pretty much everything a database administrator or engineer might need.
What is your experience regarding pricing and costs for IBM Db2 Database?
IBM Db2 is an expensive solution. While I am not heavily involved with pricing, additional companies provide capabilities or products like those from BMC, which many installations might also purchase.
What needs improvement with IBM Db2 Database?
The IBM Db2 Database is a good solution, but now there is a high maintenance charge. The IBM Db2 Database needs improved support, and there are many difficulties in using it. We tend to use the clo...
What do you like most about IBM Informix?
It supports multiple applications and business intelligence tools.
What is your experience regarding pricing and costs for IBM Informix?
The product has reasonable pricing. We purchase its yearly license.
What needs improvement with IBM Informix?
The key areas for improvement revolve around understanding the current customer trends and demands, particularly in software and database requirements. The product's performance could be better com...
 

Comparisons

 

Also Known As

DB2
Informix
 

Overview

 

Sample Customers

Knorr-Bremse, Mizuho Bank Ltd., Australian Government Department of Defence, SCHWENK Zement, Friedhelm Loh Group, YAZAKI Europe Limited, Ekornes ASA, Baldor Electric, VSN Systemen BV, Lion Brewery (Ceylon) PLC, PLANSEE Group, TE Connectivity, Hansgrohe SE, Openmatics, University of Toronto
Shaspa, Hildebrand, Kaifa, Ranhill Powertron, Federaci‹ Farmacutica (FedeFarma), Camden Council, The German Aerospace Center (DLR), Myers, Votorantim Group, Doosan Infracore, GreenIvory
Find out what your peers are saying about IBM Db2 Database vs. IBM Informix and other solutions. Updated: September 2025.
867,349 professionals have used our research since 2012.