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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

"Flexible Grid provides the ability to automatically create database objects, such as tables, indexes, and stored procedures on all nodes within the grid as a single operation."
"So far, we do not have a lot of issues. It's pretty problem-free."
"The most valuable feature is concurrency and locking because my customers usually use databases in OLTP mode. So, for a large number of competitive users. Other features that are well valued are quick large-scale data types. It is better than Oracle."
"The initial setup is very simple."
"The solution's stability, performance, enhanced functionality, and replication are all great features."
"Replication, all levels of replication, query charting, and the MongoDB embedded are the most valuable features of this solution."
"It is very easy to install IBM Informix, very easy to scale, and support is quite better."
"It supports multiple applications and business intelligence tools."
"As an engineer working for multiple organisations, MS SQL has proven stability and operational power."
"I like that it's a cloud solution, is simple to set up, and is simple to use."
"It is an extremely stable solution."
"This is a very affordable solution, which is why it's used so widely in the market."
"The technical support that Microsoft provides is great."
"From my point of view, using SQL Server 2017 and 2019 is very good."
"The most valuable aspect is the ability to utilize jobs and various functions to accomplish specific tasks, which cannot be achieved with standard procedures alone. This allows for a combination of features and functionalities to be employed."
"The installation was straightforward. We did not have a large installation and it took a couple of weeks to complete."
 

Cons

"This product could be made easier to use for beginners."
"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."
"The support team could include local engineers to establish efficient communication. It will help us speed up the escalation process."
"This product could be made easier to use for beginners."
"Every month or every second month, we find some bugs in it, which is not ideal."
"The pricing is a bit expensive."
"The solution should offer replication. It would be helpful if the solution would allow us to access third-party tools."
"In terms of improvement, it could use more integration with other products."
"SQL is a highly unstable server - there are patch updates on the Windows server every week, which is why we only use it for non-critical systems."
"I think the treatment of database storage could be improved."
"There is room for improvement in terms of pricing for SQL Server."
"The main area of SQL Server that can be improved is the price. The cost is substantial for using the tool."
"The reporting services of the solution (SSRS and now Power BI) are the less valuable items of the SQL Server suite."
"Microsoft could improve SQL Server by integrating the tools better."
"With so much data, things can get slow, which is why I would like to be able to understand how to better optimize queries."
 

Pricing and Cost Advice

"For me, it's always too expensive."
"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."
"The product has reasonable pricing. We purchase its yearly license."
"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."
"It is annual."
"There is an annual license and it is priced reasonably."
"The pricing from Microsoft is quite expensive compared to Oracle."
"We're looking at alternative solutions because we think Microsoft's licensing costs have been expensive."
"Licensing fees increase depending on size and performance. If you want higher performance, you should go for a different course."
"You need to pay for the license. It most probably has per-core licensing."
"The product's price is reasonable."
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Top Industries

By visitors reading reviews
Comms Service Provider
8%
University
8%
Construction Company
7%
Computer Software Company
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.
885,311 professionals have used our research since 2012.