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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."
"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."
"My advice is to take it; you will never regret it."
"Overall, this is a great product. It works really well, is very stable, and is very scalable."
"It is very easy to install IBM Informix, very easy to scale, and support is quite better."
"Informix can support huge quantities of data with less memory and less capacity."
"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."
"Replication, all levels of replication, query charting, and the MongoDB embedded are the most valuable features of this solution."
"There is a return on investment because based on analytics, we are reducing the number of people who are doing the analytical part so that it's an automated process, and the data will be available to everyone, including business users."
"Even though there are some very useful features on Oracle, MySQL, and other platforms, the SQL Server by far has the most robust capabilities of any database platform."
"SQL Server scales well."
"A big advantage is the ability to store any type of data in SQL Server."
"Microsoft has one of the best supports."
"The initial setup is easy, flawless."
"Very stable relational database management system that offers ease of management, querying, and scaling. It has well-designed databases."
"The solution has proven to be very stable."
 

Cons

"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."
"I really would love to have a QT plugin."
"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."
"The solution doesn't include functionality like data anonymization."
"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."
"Continue extending the SQL language for compatibility with the competition's language, including Stored Procedure Language."
"Analysis services have a lot of room for improvement. Basically, manageability on the available tools. They should have improved them already. They are not very efficient. My main headache is with the analysis service, and it would be really good if Microsoft developed some additional tools that are more user-friendly to manage the analysis. This is both from the perspective of management, users' roles, and performance analysis. My main wish for SQL Server would be that management tools for analysis services grow and mature a bit."
"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 is an expensive solution"
"We are the largest micro-credit finance company with more than thirty companies internally. We have 25,000 employees using the business application and SQL does not scale to our requirements."
"Its security can be improved. When you look at the Windows environment, it isn't the most secure environment."
"The security features of the solution could be 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."
"Technical support could be faster."
 

Pricing and Cost Advice

"For me, it's always too expensive."
"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."
"I am not aware of the licensing costs or terms."
"The product has reasonable pricing. We purchase its yearly license."
"Currently, almost all of my machines are in Azure and I think it is the best way of licensing now (VM+software)."
"Their options for concurrency and locking are good, as well as their prices."
"I rate the product’s pricing a six out of ten."
"It's cheaper than Oracle."
"SQL Server's pricing has proven satisfactory for our market range."
"The price of the solution is fine."
"The pricing from Microsoft is quite expensive compared to Oracle."
"There is no licensing cost for SQL Server."
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Top Industries

By visitors reading reviews
Comms Service Provider
9%
Construction Company
8%
Financial Services Firm
8%
University
7%
Financial Services Firm
40%
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.
891,869 professionals have used our research since 2012.