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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) (1st)
 

Mindshare comparison

As of March 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 11.9%, down from 18.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Relational Databases Tools Market Share Distribution
ProductMarket Share (%)
SQL Server11.9%
IBM Informix1.8%
Other86.3%
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

"The solution's stability, performance, enhanced functionality, and replication are all great features."
"It is very easy to install IBM Informix, very easy to scale, and support is quite better."
"Every version is faster than the previous."
"Replication is a valuable feature and easy to use."
"It supports in-house-built applications in .NET and VB6"
"The initial setup is pretty easy."
"IBM Informix benefits users with high availability and good integration capabilities."
"It supports multiple applications and business intelligence tools."
"What I like most is the management, as it is very easy compared with other products."
"The most valuable features of SQL Server are the speed, great support, and it is from a known vendor."
"Microsoft SQL Server is one of the better database administration software packages out there. It runs primarily on Windows Server platforms, but it can also run on Linux platforms."
"The ease of administration, in general, is the solution's most valuable aspect."
"I have experience with this product for many years. I never have problems with it. It can handle a PC, and it can also handle huge data. It is fast and efficient."
"The product is easy to use."
"We are using the net for our environment. We're using the ADF Azure data factory for our analysis services, and it is pretty good."
"Easy to implement and user-friendly relational database management system. This product is stable and scalable."
 

Cons

"This product could be made easier to use for beginners."
"I really would love to have a QT plugin."
"There should be more intelligence surrounding discovering data to be able to automatically create indexes."
"The support team could include local engineers to establish efficient communication. It will help us speed up the escalation process."
"Every month or every second month, we find some bugs in it, which is not ideal."
"Continue extending the SQL language for compatibility with the competition's language, including Stored Procedure Language."
"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."
"There is room for improvement in terms of pricing for SQL Server."
"I would like Microsoft to evolve SQL Server because stateful databases dying are in a way. We would like to find out if it can absorb Hadoop and other similar things. They should make it useful for data mining. Data is evolving forever, and how we store it is also changing constantly. So, SQL Server also needs to change."
"The solution could offer more integration with other platforms."
"Support could be improved."
"Indexing, as well as integration, are areas of this product that need improvement."
"Its security can be improved. When you look at the Windows environment, it isn't the most secure environment. It is exposed to so many attacks. They continuously need to improve the security of the platform on which it sits."
"There are a few use cases where we do need the Active-Active options instead of Active-Passive, yet those kinds of options are not available for Microsoft."
"The solution needs to be more secure. It's lacking, compared to, for example, Oracle."
 

Pricing and Cost Advice

"I am not aware of the licensing costs or terms."
"The product has reasonable pricing. We purchase its 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."
"For me, it's always too expensive."
"It is expensive, but you get what you pay for."
"We pay per second of usage, but there are different offerings of the license."
"Licensing fees are paid on a yearly basis."
"SQL Server is an expensive solution."
"The price of the solution could be reduced, it is expensive."
"We're looking at alternative solutions because we think Microsoft's licensing costs have been expensive."
"The price of the solution is very expensive. If I went with the cloud version of SQL a license would cost me approximately 11,000 Riyals per month."
"Cost is a major derivative for any organization. It has a reasonable cost value, and its cloud support is also better than others. Comparatively, Oracle can do the same things or is even better in certain areas, but it is expensive. The cost along with the support are the plus factors for SQL Server."
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Top Industries

By visitors reading reviews
University
8%
Comms Service Provider
7%
Computer Software Company
7%
Financial Services Firm
7%
Financial Services Firm
39%
Manufacturing Company
6%
Computer Software Company
6%
Comms Service Provider
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 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...
What is your primary use case for IBM Informix?
We are using IBM Informix for OLTP systems. We are using IBM Informix although it is a technology that is not very popular compared to others. We are using it because our application was initially ...
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: March 2026.
883,448 professionals have used our research since 2012.