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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

"Replication, all levels of replication, query charting, and the MongoDB embedded are the most valuable features of this solution."
"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."
"It is very easy to install IBM Informix, very easy to scale, and support is quite better."
"Replication is a valuable feature and easy to use."
"It supports in-house-built applications in .NET and VB6"
"The initial setup is pretty easy."
"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 solution can be used for a host of applications."
"SQL Server provides good performance. Most of the SQL solutions can be integrated and this solution is no different, you are able to link other databases. For example, we have Oracle running a Postgres Server and it is linked. It follows the ISO standard when it comes to commands, it works well."
"Many developers like SQL Server."
"I have found the whole solution with all its features wonderful."
"Microsoft SQL Server is one of the better database administration software packages out there. It runs primarily on Windows Server platforms, but it can also run on Linux platforms."
"The product's initial setup phase was simple."
"The ease of administration, in general, is the solution's most valuable aspect."
"We have found the solution valuable because we are able to easily create a query, shrink, backup, and make new tables."
 

Cons

"This solution is in need of more current tools."
"I really would love to have a QT plugin."
"I experienced poor input/output (IO) performance."
"The support team could include local engineers to establish efficient communication. It will help us speed up the escalation process."
"The solution lacks some functionality."
"It would be helpful to have IBM salespeople know that Informix exists, and sell it. Currently, it is completely ignored by IBM."
"The technical support services need substantial improvement."
"I would like to see backups from secondary servers."
"I have experience working with SQL Server 2016 and older versions, including handling JSON data. Initially, I found the JSON capabilities to be less helpful, but over time, they have greatly improved. SQL Server now offers extensive capabilities for working with various forms of data, particularly when communicating with text, such as in JSON format. I particularly prefer working with these features on Azure, as it provides numerous possibilities, especially in the field of business intelligence (BI). Additionally, the serverless platform offered by Azure is highly beneficial and makes tasks easier to manage."
"The way to make cursors and manage raw data in rows can be improved. Currently, the way to construct or build these cursors is very hard, and you can waste memory. You need a highly skilled person to make it more efficient. It can also have support for Cubes, which is the organization of data in different dimensions by using MDX languages."
"I would like to see more integration with other platforms."
"The only item which I can list is application failure during Integration Services debugging, when restarting a process flow. In a number of instances the solutions fails. I have not given this much thought and simply stop and start the debugging service rather than restarting."
"For a big amount of data, when we are speaking about IoT Segments, and Big Data projects, there are performance issues."
"The interface of the tool has certain shortcomings, making it an area where improvements are required."
"SQL Server could improve the integration with nonrational database solutions, such as MongoDB."
"The pricing could be better."
 

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."
"We did a one-time payment. Its price, in general, can be reduced."
"We are on a monthly subscription and the price could improve. However, the price has worked out well in some deployments. The problem is you never know what kind of services been installed and you have to be in touch with many people, such as which servers are active or which are not. I did face a couple of issues in terms of subscriptions and the pricing model. They have improved over time."
"It's cheaper than Oracle."
"On a scale of one to ten, when one is cheap and ten is an expensive solution, I rate the product price as seven. The product is expensive."
"SQL Server has the best licensing price."
"The price of the solution could be cheaper."
"Some of the licensing are very expensive, such as the Enterprise license."
"SQL Server's pricing has proven satisfactory for our market range."
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Top Industries

By visitors reading reviews
Computer Software Company
8%
University
8%
Financial Services Firm
8%
Comms Service Provider
8%
Financial Services Firm
39%
Computer Software Company
6%
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 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: February 2026.
882,207 professionals have used our research since 2012.