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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 Mindshare Distribution
ProductMindshare (%)
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

"IBM Informix benefits users with high availability and good integration capabilities."
"The scalability is very good."
"So far, we do not have a lot of issues. It's pretty problem-free."
"The solution's stability, performance, enhanced functionality, and replication are all great features."
"Replication is a valuable feature and easy to use."
"The initial setup is pretty easy."
"Replication, all levels of replication, query charting, and the MongoDB embedded are the most valuable features of this solution."
"It supports in-house-built applications in .NET and VB6"
"It works fine in terms of performance and stability."
"We've found it to basically be pretty problem-free."
"Very stable relational database management system that offers ease of management, querying, and scaling. It has well-designed databases."
"The solution has a user-friendly environment and supporting functionalities. It also has great memory and processing databases."
"SQL Server is a stable product."
"It is fairly easy to work with. I like the high-availability options, like mirroring for example, and the high-availability groups."
"SQL Server Profiler makes finding and debugging easy."
"It is a stable product, and it runs seamlessly. It is not complex."
 

Cons

"Continue extending the SQL language for compatibility with the competition's language, including Stored Procedure Language."
"I would like to see backups from secondary servers."
"This solution is in need of more current tools."
"The solution lacks some functionality."
"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."
"I really would love to have a QT plugin."
"Every month or every second month, we find some bugs in it, which is not ideal."
"There should be more intelligence surrounding discovering data to be able to automatically create indexes."
"The solution could improve by having more integration with other operating systems and other platforms."
"We experience latency at times when there is a lot of data being processed."
"They need to improve their support. It should be faster."
"There was a time when Microsoft support provided very crisp answers, but over time, they have diluted their support to third parties, leading to a drop in support quality, which restricts me from giving a perfect 10, as post-sales service is crucial."
"It would be nice if there was a feature to search for a specific value across multiple tables. This would save a lot of time for its users."
"There are a lot of improvements in the cloud space about which we open a case with Microsoft every now and then. These improvements are not in terms of features or functionality. They are more related to their own compatibility or connectivity on which they keep on working to improve the product."
"SQL Server database capacities could be further increased to be more accessible for larger data requirements."
"I would like to see the database become fully automated."
 

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."
"SQL Server offers three versions. You can get a free trial for 30 days."
"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."
"It is annual."
"We have had to purchase the Enterprise version to the tune of a few hundred thousand dollars, which is just ridiculous."
"Although it comes with a cost, using the most recent version is highly advisable, since it would ensure a certain measure of bug fixes and stability. The sole issue would involve the cost, as this is expensive."
"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."
"I don't know the exact prices because my focus is essentially technical and not on the bills. A few years ago, they changed the billing policy for the Enterprise Edition, and it became less attractive. But I believe they are still cheaper than Oracle. SQL Server isn't cheap, but it's not expensive either."
"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."
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Top Industries

By visitors reading reviews
University
8%
Comms Service Provider
8%
Computer Software Company
7%
Financial Services Firm
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 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.
884,873 professionals have used our research since 2012.