Try our new research platform with insights from 80,000+ expert users

IBM Informix vs SQL Server 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 Informix
Ranking in Relational Databases Tools
23rd
Average Rating
8.2
Reviews Sentiment
7.5
Number of Reviews
17
Ranking in other categories
Embedded Database (10th)
SQL Server
Ranking in Relational Databases Tools
1st
Average Rating
8.4
Reviews Sentiment
6.9
Number of Reviews
272
Ranking in other categories
Database Management Systems (DBMS) (4th)
 

Mindshare comparison

As of January 2026, in the Relational Databases Tools category, the mindshare of IBM Informix is 1.8%, up from 1.7% compared to the previous year. The mindshare of SQL Server is 12.1%, down from 19.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Relational Databases Tools Market Share Distribution
ProductMarket Share (%)
SQL Server12.1%
IBM Informix1.8%
Other86.1%
Relational Databases Tools
 

Featured Reviews

Nasir Niamat - PeerSpot reviewer
DB Consultant at i2c
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.
Peter Larsson - PeerSpot reviewer
Data Warehouse Lead at Resurs Bank AB (publ.)
Ledger and seamless integrations have strengthened trusted analytics and unified workloads
SQL Server's high availability and disaster recovery features work for supporting mission-critical applications, but there is much more to wish for. These features are not quite ready yet, although they do function. However, they could be significantly better. High availability and disaster recovery features should be improved in the next releases. I have noticed that everything could be improved or enhanced in the future, particularly temporal tables and window functions. Sometimes, I believe Microsoft releases features to stay ahead of competitors, but they do not make them feature-rich or feature-complete. They release something to be ahead of leaders and then seem to forget to maintain and upgrade them. I want Microsoft to pay more attention and be more mindful about the things they implement. It is fine to do a first release that works, but you cannot simply abandon it in the following years without service packs and improvements. You must continue to build on features rather than forgetting about them.

Quotes from Members

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

Pros

"It supports in-house-built applications in .NET and VB6"
"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."
"It supports multiple applications and business intelligence tools."
"So far, we do not have a lot of issues. It's pretty problem-free."
"The stability is incredible. I have customers with uptimes of several years."
"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."
"The most valuable features are programmability and reliability."
"Without any doubt the Integration Services and Analysis Services are the most widely used. These are the basis for data quality, data gathering, ETL process, as well as collation for the data warehouse, Cube-generation, and ad-hoc processes. The ease in which you may mold a process flow or even modularly add in new structures is something which is much needed in my job."
"A big advantage is the ability to store any type of data in SQL Server."
"Enables us to convert to bigger DBs and more easily move or upgrade between branches."
"The solution seems to be pretty flexible."
"Technical support is very good."
"The scalability of the product is great."
"SQL Server is a highly stable solution."
 

Cons

"The support team could include local engineers to establish efficient communication. It will help us speed up the escalation process."
"I experienced poor input/output (IO) performance."
"The solution lacks some functionality."
"It would be helpful to have IBM salespeople know that Informix exists, and sell it. Currently, it is completely ignored by IBM."
"In my opinion, the packages could be improved. The version I use doesn't allow for packages. I can do some general procedures, but no packages like in Oracle. So, develop separate modules in SQL language. This would be most beneficial for me."
"There should be more intelligence surrounding discovering data to be able to automatically create indexes."
"Continue extending the SQL language for compatibility with the competition's language, including Stored Procedure Language."
"I really would love to have a QT plugin."
"There are certain shortcomings in the scalability of the product, making it an area where improvements are required."
"We pay a license fee, it could always be cheaper."
"It pesters you to update the Client every month when there is nothing new that you really need to add, but it is constantly pestering you. I do not care for it."
"The solution is expensive. The licensing costs are high."
"I would like to see more integration with other products and it needs to be more secure."
"The UX design of this system needs improvement."
"The interface of the tool has certain shortcomings, making it an area where improvements are required."
"SQL Server is an expensive solution"
 

Pricing and Cost Advice

"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."
"I am not aware of the licensing costs or terms."
"For me, it's always too expensive."
"The cost is high and because it's an expensive product, we are in the process of moving towards open-source solutions."
"Pricing is a bit on the higher side."
"To scale the solution there are additional costs."
"For a brief period, approximately one year before 2018, I had experience working with the open-source version of SQL Server. During that time, I found SQL Server to be the preferred choice, in my opinion."
"The price of SQL Server could be better in the African market. The licensing model needs to be improved, it is confusing."
"SQL Server is an expensive solution."
"It's cheaper than Oracle."
"The price has been going higher and higher. The market is quite price sensitive."
report
Use our free recommendation engine to learn which Relational Databases Tools solutions are best for your needs.
880,844 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Financial Services Firm
9%
University
9%
Computer Software Company
9%
Manufacturing Company
7%
Financial Services Firm
39%
Computer Software Company
7%
Manufacturing Company
7%
Government
4%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business9
Midsize Enterprise2
Large Enterprise8
By reviewers
Company SizeCount
Small Business119
Midsize Enterprise59
Large Enterprise115
 

Questions from the Community

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...
Would you say the price of SQL Server is high compared to that of similar products?
SQL Server is fairly priced because it has various editions, depending on the number of users, servers, or core packs you are using. If you compare the product to others in this category, the price...
Has using SQL Server helped your organization in any way?
SQL Server has helped my organization through partitioning to distribute the workload, as it splits them up into smaller pieces so the machines can easily deal with it. However, this comes with a h...
Which authentication mode is best for SQL Server?
My company connects through SQL Server authentication. We have company Windows accounts, but we do not want to connect the two, out of security concerns and to keep things separated for our own pur...
 

Comparisons

 

Also Known As

Informix
Microsoft SQL Server, MSSQL, MS SQL
 

Overview

 

Sample Customers

Shaspa, Hildebrand, Kaifa, Ranhill Powertron, Federaci‹ Farmacutica (FedeFarma), Camden Council, The German Aerospace Center (DLR), Myers, Votorantim Group, Doosan Infracore, GreenIvory
Microsoft SQL Server is used by businesses in every industry, including Great Western Bank, Aviva, the Volvo Car Corporation, BMW, Samsung, Principality Building Society, Wellmark Blue Cross and Blue Shield, and the Catholic District School Board of Eastern Ontario.
Find out what your peers are saying about IBM Informix vs. SQL Server and other solutions. Updated: December 2025.
880,844 professionals have used our research since 2012.