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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 February 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 11.8%, down from 19.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Relational Databases Tools Market Share Distribution
ProductMarket Share (%)
SQL Server11.8%
IBM Informix1.8%
Other86.4%
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."
"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."
"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."
"IBM Informix benefits users with high availability and good integration capabilities."
"It supports multiple applications and business intelligence tools."
"The scalability is very good."
"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."
"The availability is the most valuable feature. It has high availability. It also has good performance."
"I have contacted technical support, and overall my experience with technical support was okay."
"SQL Server is quite stable. And now we are using the Lattice 2017 version."
"It's great that the database engine is always on."
"The product's initial setup phase was simple."
"We are using the net for our environment. We're using the ADF Azure data factory for our analysis services, and it is pretty good."
"It is stable, and it works okay."
"The most valuable feature of SQL Server is the performance."
 

Cons

"Every month or every second month, we find some bugs in it, which is not ideal."
"The support team could include local engineers to establish efficient communication. It will help us speed up the escalation process."
"The solution really doesn't add new features very often."
"Continue extending the SQL language for compatibility with the competition's language, including Stored Procedure Language."
"This solution is in need of more current tools."
"I really would love to have a QT plugin."
"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."
"If SQL Server could perhaps run on Linux, that would be good. Most of us prefer Linux and I've used a lot of Linux. I understand that SQL Server is quite powerful, but I'm not sure if the functionality is there, but if it could be used in an open-source type of environment, it would be very good."
"The solution could use better governance on the management side, especially around data governance."
"You do need to have technical knowledge in order to install the solution. It's not something a layperson can do."
"They need to improve their support. It should be faster."
"They can build more performance-tuning tools in it. They can also make the stuff a little more user-friendly and provide the ability to schedule jobs. They can perhaps also streamline it a little bit so that it is not so resource-intensive, which would be helpful. SQL Server has a tendency to consume all the memory you allow it to. If you are not careful, you can basically break your server. I would like to see it having a smaller footprint in terms of system resource consumption. They might want to consider re-evaluating their pricing. It is expensive."
"I would like to see the integration with other platforms improved in the future."
"The maintenance and tasks should be improved so as to reduce database files."
"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."
 

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."
"The product has reasonable pricing. We purchase its yearly license."
"I am not aware of the licensing costs or terms."
"SQL Server offers three versions. You can get a free trial for 30 days."
"For smaller companies, they find this solution expensive."
"Our customers do pay license fees for the MS SQL Server but the Rabbit is free, as it is open-source software."
"I don't need a license for it as I will be migrating to Office 365."
"There is a license required for this solution."
"It's a bit expensive."
"We are on an annual enterprise license for the solution and the cost of the license could be reduced."
"Licensing fees increase depending on size and performance. If you want higher performance, you should go for a different course."
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Top Industries

By visitors reading reviews
Financial Services Firm
9%
Computer Software Company
8%
University
8%
Comms Service Provider
7%
Financial Services Firm
38%
Computer Software Company
7%
Manufacturing Company
6%
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 do you like most about IBM Informix?
It supports multiple applications and business intelligence tools.
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...
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: February 2026.
881,665 professionals have used our research since 2012.