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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

"The solution's stability, performance, enhanced functionality, and replication are all great features."
"Every version is faster than the previous."
"Overall, this is a great product. It works really well, is very stable, and is very scalable."
"The initial setup is pretty easy."
"The scalability is very good."
"The solution is quite stable and reliable; we use it mainly due to its general stable nature."
"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 works fine in terms of performance and stability."
"Comparing with other database management systems that I tried in other companies, SQL Server is quite easy to install, configure, and maintain."
"Their integration, SSRS and SSIS tools are really good."
"I love the developer version. Microsoft tells you about all the cool things they provided for everybody. You can develop and do anything with it. It's really good to learn. Oracle will not give you that much freedom, and Microsoft really kills it. You don't do anything with it but develop, learn, break, and push it to its limits. If there are problems, you show Microsoft or ask them, "what's going on here?" There is good community support for the developer edition, and that's what I really appreciate. You can teach people about it without limitations. You can have small databases created. You can keep it for a year and then work on it. It's a good thing for learners and developers."
"SQL Server is easy to manage because all our DevOps team are familiar with it and simple to access because it is cloud-based."
"I love the developer version because you can develop and do anything with it, learn, break, and push it to its limits with great community support and without limitations, making it a good thing for learners and developers."
"I have complete warehouse logic inside stored procedure and it works like a charm."
"I use this solution as our data warehouse; we use the reports, data analysis, and for connecting our databases to multiple resources."
 

Cons

"The solution lacks some functionality."
"Every month or every second month, we find some bugs in it, which is not ideal."
"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."
"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."
"I would like to see backups from secondary servers."
"Indexing, as well as integration, are areas of this product that need improvement."
"SQL Server could integrate better with other platforms."
"The GUI needs improvement. From a technical perspective, it's quite complex, which may not be a problem for individuals with technical backgrounds like ours, especially since we've encountered similar interfaces. However, navigating the GUI can be challenging for newcomers or product owners without technical experience. For example, as someone transitioning from a developer role to a product management role, I find it relatively easy to use the GUI. But for those without a technical background, it's much more challenging to grasp what's happening."
"In some cases it is quite difficult, like the lack of ease of the replication and other issues."
"SQL Server has good performance, but it could be better."
"SQL Server is not going to do that. In this way, it is not very scalable."
"In terms of improvement, it could use more integration with other products."
"The scalability and the high availability feature can be expanded or improved. Currently, there is a limitation on scalability. A feature similar to the Oracle Diagnostic feature can be included to provide a better user experience."
 

Pricing and Cost Advice

"I am not aware of the licensing costs or terms."
"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."
"The product has reasonable pricing. We purchase its yearly license."
"To scale the solution there are additional costs."
"I know the SQL Server pricing model, I believe, is based on CPU cores that your database server has, but I don't know what the solution's prices are though."
"I believe the licensing to be on an annual basis."
"It comes with the bundle package that we have. We have Microsoft Volume Licensing, so we don't have to pay for it separately. It is a part of the package."
"There is an annual license and it is priced reasonably."
"It's cheaper than Oracle."
"The licenses are really expensive. Their licensing model should be more simplistic."
"It costs a lot."
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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.
886,664 professionals have used our research since 2012.