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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 feature of the IBM Db2 Database is the ease of use, and the ability to do query writing of any SQL statement and have an output."
"Scalability-wise, I rate the solution a nine out of ten."
"Db2 database scalability and performance capabilities match our database needs. It covers pretty much everything a database administrator or engineer might need."
"The solution is a very stable relational database and has integration with legacy systems. It is a great product."
"IBM Db2 was much cheaper as a package than using other products. This is because IBM supplied a package with its product. It's an application. So it was much more efficient and a stronger competitor in that regard."
"It has a good, stable performance."
"The self-management and optimization features are probably the best on the market"
"The solution's security is very tough and impenetrable."
"The scalability is very good."
"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."
"It supports multiple applications and business intelligence tools."
"IBM Informix benefits users with high availability and good integration capabilities."
"So far, we do not have a lot of issues. It's pretty problem-free."
"It supports in-house-built applications in .NET and VB6"
"The initial setup is pretty easy."
"The solution's stability, performance, enhanced functionality, and replication are all great features."
 

Cons

"We just want a bit more integration with Linux. That said, we are already seeing Linux more readily available on the mainframe environment."
"Its process of building up queries could be more accessible."
"We need some time to improve the performance. We have to perform a weekly REORG, or else RUNSTATS for the databases."
"The IBM Db2 Database needs improved support, and there are many difficulties in using it."
"The only drawback that we see in Db2 Database is the crash recovery. When there is a crash and somebody has to do the recovery, Db2 Database first stops, and then it does any crash recovery. In Oracle Database, crash recovery happens within the database. The database is not shut down."
"Some of the internal rearrangement in the administration is not as straightforward as it is in competing products."
"GUI needs improvement."
"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 solution lacks some functionality."
"The support team could include local engineers to establish efficient communication. It will help us speed up the escalation process."
"Continue extending the SQL language for compatibility with the competition's language, including Stored Procedure Language."
"The technical support services need substantial improvement."
"The pricing is a bit expensive."
"I really would love to have a QT plugin."
"It would be helpful to have IBM salespeople know that Informix exists, and sell it. Currently, it is completely ignored by IBM."
"Every month or every second month, we find some bugs in it, which is not ideal."
 

Pricing and Cost Advice

"Compared to other databases, Db2 is relatively cheaper."
"I rate the product pricing a nine out of ten."
"It's very expensive for West African countries like ours."
"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."
"Db2 is less expensive than Oracle."
"The solution's hardware and subscription model for support are very expensive."
"It is expensive when compared to other products."
"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."
"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
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.