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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
24th
Average Rating
8.2
Reviews Sentiment
7.5
Number of Reviews
17
Ranking in other categories
Embedded Database (9th)
SQL Server
Ranking in Relational Databases Tools
1st
Average Rating
8.4
Reviews Sentiment
6.6
Number of Reviews
274
Ranking in other categories
Database Management Systems (DBMS) (1st)
 

Mindshare comparison

As of April 2026, in the Relational Databases Tools category, the mindshare of IBM Informix is 1.8%, up from 1.8% compared to the previous year. The mindshare of SQL Server is 11.2%, down from 17.9% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Relational Databases Tools Mindshare Distribution
ProductMindshare (%)
SQL Server11.2%
IBM Informix1.8%
Other87.0%
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

"We don't have any problems with the Informix Database."
"It supports in-house-built applications in .NET and VB6"
"The scalability is very good."
"Replication is a valuable feature and easy to use."
"Replication, all levels of replication, query charting, and the MongoDB embedded are the most valuable features of this solution."
"Informix can support huge quantities of data with less memory and less capacity."
"The solution is quite stable and reliable; we use it mainly due to its general stable nature."
"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 product has been on the market for over 25 or 30 years. It's an extremely mature solution."
"The solution is very easy to use."
"My advice for people looking into using SQL Server is that it's the best choice, especially for those who are beginners with databases."
"The replication feature, user interface, reporting services, and notification services are really good. They are providing SQL profiler and SQLCMD as their integrated software, so we don't find it difficult to integrate any of our third-party applications with MS SQL because all of them support MS SQL very clearly."
"The solution can be deployed in a few minutes."
"I always recommend SQL Server; to whoever asks me, I will say, "Just go for it.""
"The solution seems to be pretty flexible."
"It's a normal DMS, so it can be used everywhere you want to use any RDBMS or relational database."
 

Cons

"I would like to see backups from secondary servers."
"The solution really doesn't add new features very often. Other solutions are much more actively pushing out upgrades and improvements."
"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."
"The product needs a lot more marketing involvement from 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."
"The solution should offer replication. It would be helpful if the solution would allow us to access third-party tools."
"This product could be made easier to use for beginners."
"While this is a reliable product, it has room for improvement."
"There are certain shortcomings in the scalability of the product, making it an area where improvements are required."
"Our biggest problem with SQL Server is latency."
"We want to move to Azure, and the solution could be made better to make the process easier for the migration from on-premise to the cloud."
"It could be more stable."
"The Management Studio is a pretty heavy piece of software, and it's sometimes slow. I would recommend making an express version of the Management Studio, which is lighter and has fewer features but is a little faster."
"SQL Server backups could be better."
"Our original architecture messaging infrastructure was based on Microsoft SQL server's Message Broker. It's been a complete disaster."
 

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."
"For me, it's always too expensive."
"I am not aware of the licensing costs or terms."
"We have an enterprise license, which we consider to be fine."
"It is expensive in terms of licensing costs and pricing. If you want to scale SQL Server, it is very expensive. We probably have to pay extra for technical support. We also have to pay for the license of Windows on which the SQL Server resides, which is an extra cost."
"The cost is high and because it's an expensive product, we are in the process of moving towards open-source solutions."
"The SQL server is affordable. I rate the pricing a five out of ten."
"This is a very cheap product."
"We have had to purchase the Enterprise version to the tune of a few hundred thousand dollars, which is just ridiculous."
"The price of the solution could be reduced, it is expensive."
"For our purpose, we are not required to have a license for what we are using it for."
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Top Industries

By visitors reading reviews
Construction Company
8%
Comms Service Provider
8%
Financial Services Firm
8%
University
7%
Financial Services Firm
39%
Manufacturing Company
6%
Computer Software Company
5%
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 Enterprise60
Large Enterprise118
 

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: April 2026.
886,576 professionals have used our research since 2012.