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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
24th
Average Rating
8.2
Reviews Sentiment
7.5
Number of Reviews
17
Ranking in other categories
Embedded Database (10th)
 

Mindshare comparison

As of October 2025, in the Relational Databases Tools category, the mindshare of IBM Db2 Database is 7.6%, up from 7.0% compared to the previous year. The mindshare of IBM Informix is 1.9%, up from 1.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Relational Databases Tools Market Share Distribution
ProductMarket Share (%)
IBM Db2 Database7.6%
IBM Informix1.9%
Other90.5%
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…
Nasir Niamat - PeerSpot reviewer
Has offered a cost-effective option despite frequent technical issues and limited market demand
We find some bugs in IBM Informix. Maybe we are using it more aggressively than others. Every month or every second month, we find some bugs in it, which is not ideal. It should be rare, not this frequent. The good thing is they cover those bugs in the next release within weeks or days on demand. IBM Informix should become hybrid and should include AI features similar to other DBMS systems such as Snowflake, Redshift, and DataBricks. This would help its value rise with the market.

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 aspect of this solution is its stability. We have never had any problems and have never had to contact technical support."
"The solution has many beneficial features, such as security, support, and stability."
"IBM DB2 pureScale Feature is valuable."
"IBM Db2 Database has good performance."
"​Scales well enough for a relational database."
"The most valuable feature of this solution is the integration with other IBM products."
"When you submit a ticket the response time is quick."
"The solution has very good data compression of up to 50%. For example, if you have 50 terabytes of data, it can be reduced to 25 terabytes."
"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."
"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."
"The solution's stability, performance, enhanced functionality, and replication are all great features."
"Replication is a valuable feature and easy to use."
"For IoT business cases, having Informix Enterprise Edition work on edge computers, like Raspberry Pi and using Informix replication, makes complex situations simple to build and maintain."
"The initial setup is pretty easy."
"Replication, all levels of replication, query charting, and the MongoDB embedded are the most valuable features of this solution."
"It supports in-house-built applications in .NET and VB6"
 

Cons

"They should develop its containerized version."
"They could enhance the product's cloud integration and general-purpose database capabilities."
"The licensing fees can be reduced."
"IBM's products tend to be quite costly, especially given the availability of free, open-source alternatives."
"The GUI interface is not particularly friendly for those who do not have experience with the product."
"The tool is not easy to use. It needs to improve scale computing so that the tool can be scaled vertically. The product needs to enhance pre-engine optimization and it needs to be more efficient in completing queries. The documentation should be updated to include different scenarios of deployment."
"Performance is something that can be improved with DB2."
"IBM Db2 Database could improve in the steps it takes for upgrades. It is not an easy process. The process of upgrading the version is lengthy and requires a lot of time. To make it more efficient, I suggest implementing some automation on the solution side. This will greatly reduce the time required for the upgrade."
"It would be helpful to have IBM salespeople know that Informix exists, and sell it. Currently, it is completely ignored by IBM."
"The solution really doesn't add new features very often."
"The support team could include local engineers to establish efficient communication. It will help us speed up the escalation process."
"I would like to see backups from secondary servers."
"I really would love to have a QT plugin."
"Continue extending the SQL language for compatibility with the competition's language, including Stored Procedure Language."
"This product could be made easier to use for beginners."
"The technical support services need substantial improvement."
 

Pricing and Cost Advice

"I would rate the pricing a five out of ten. It's not super expensive, but also not cheap."
"If I consider the price of IBM Db2 Database, I would say there are cheaper products in the market."
"Among Microsoft SQL Server, Oracle, and Db2, Microsoft SQL Server is the cheapest one, and Oracle is the most expensive one. Db2 is in the middle. As compared to SQL Server, its price could go down. It will be good for customers."
"They are competitive and honest (compared to how peer firms approach licensing conversations). ​"
"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 think that everyone knows that with IBM the standard price is higher than the others."
"Compared to Oracle, it is so much cheaper."
"We purchase the product's yearly license."
"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."
"I am not aware of the licensing costs or terms."
"The product has reasonable pricing. We purchase its yearly license."
"For me, it's always too expensive."
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Top Industries

By visitors reading reviews
Financial Services Firm
20%
Manufacturing Company
9%
Computer Software Company
9%
Government
8%
Computer Software Company
10%
Financial Services Firm
9%
Manufacturing Company
8%
Comms Service Provider
7%
 

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 Enterprise8
 

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?
There is a cost reason to move from IBM Informix. It is relatively cheaper than Oracle. The second reason is that moving the whole application to a new database would require significant cost. The ...
What needs improvement with IBM Informix?
We find some bugs in IBM Informix. Maybe we are using it more aggressively than others. Every month or every second month, we find some bugs in it, which is not ideal. It should be rare, not this f...
 

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.
872,706 professionals have used our research since 2012.