Try our new research platform with insights from 80,000+ expert users

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."
"Replication is a valuable feature and easy to use."
"Every version is faster than the previous."
"The solution's stability, performance, enhanced functionality, and replication are all great features."
"The stability is incredible. I have customers with uptimes of several years."
"It is very easy to install IBM Informix, very easy to scale, and support is quite better."
"For IoT business cases, having Informix Enterprise Edition work on edge computers, like Raspberry Pi and using Informix replication, makes complex situations simple to build and maintain."
"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 feature that I have found most valuable is that it is easy to code."
"The performance is great."
"I value the ability it gives me to test on small machines and easily scale up to larger devices for live applications."
"Without any doubt the Integration Services and Analysis Services are the most widely used. These are the basis for data quality, data gathering, ETL process, as well as collation for the data warehouse, Cube-generation, and ad-hoc processes. The ease in which you may mold a process flow or even modularly add in new structures is something which is much needed in my job."
"SQL Server and their offers are very good. You can switch over, export, and do other things."
"The most valuable feature of SQL Server is that it is easy to set up."
"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 most valuable feature of the solution, compared to other RDBMS solutions, such as Oracle MySQL or IBM DB2, it is more user-friendly and has backward compatibility. For example, if you have an application that requires an old version of SQL Server and you have the latest version of the license, you are able to install and use it in backward compatibility mode. They keep supporting the existing legacy application."
 

Cons

"It would be helpful to have IBM salespeople know that Informix exists, and sell it. Currently, it is completely ignored by IBM."
"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."
"I really would love to have a QT plugin."
"I experienced poor input/output (IO) performance."
"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."
"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."
"Indexing, as well as integration, are areas of this product that need improvement."
"In the next release, I would like to see a better user interface and a familiar syntax."
"SQL Server could improve by increase the performance, it cannot handle large amounts of data. I did not find any additional features compared to others solutions."
"The pricing of the product could be better."
"They have too many licensing options. They may want to simplify its licensing and bring it down to two, three, or four categories from ten to fifteen categories. Having so many different licensing options makes it difficult to decide which one to choose from. They can club things together. This is an area where they can make things easier for customers."
"SQL Server has good performance, but it could be better."
"We would like to have a common storage option in the SQL Server. This option is available in Oracle Database. It would be great if Microsoft could create something like a columnstore that has not only indexing but also tables for common storage."
"The number of concurrent users is too limited and other databases are better than SQL in this regard."
 

Pricing and Cost Advice

"I am not aware of the licensing costs or terms."
"For me, it's always too expensive."
"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."
"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."
"We purchased our license and the pricing is fine for us."
"It is expensive, especially when you have open-source products that are just about as functional and they're free. They might want to consider re-evaluating their pricing. We purchased it in retail. It was somewhere in the neighborhood of 9,000. There is just the standard licensing fee. If they migrate this product the way they're trying to do everything else, eventually, it is going to be subscription-based, which is going to suck, but that's the way the industry is going, so it is what it is."
"The licenses are really expensive. Their licensing model should be more simplistic."
"Pricing is a bit on the higher side."
"This is a downside of enterprise Microsoft products."
"The setup cost is high, but it will return every penny."
"There is a license to use this solution. However, the model is not easy to understand. There is a guide you have to read about all the information on how it works. If you read this documentation, you can understand how it works. We are paying for our SQL Servers by CPU cores with an enterprise license."
report
Use our free recommendation engine to learn which Relational Databases Tools solutions are best for your needs.
884,696 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
University
8%
Comms Service Provider
8%
Computer Software Company
8%
Financial Services Firm
7%
Financial Services Firm
39%
Manufacturing Company
6%
Computer Software Company
6%
Government
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.
884,696 professionals have used our research since 2012.