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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 (10th)
SQL Server
Ranking in Relational Databases Tools
1st
Average Rating
8.4
Reviews Sentiment
6.8
Number of Reviews
270
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of October 2025, in the Relational Databases Tools category, the mindshare of IBM Informix is 1.9%, up from 1.7% compared to the previous year. The mindshare of SQL Server is 15.5%, down from 22.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Relational Databases Tools Market Share Distribution
ProductMarket Share (%)
SQL Server15.5%
IBM Informix1.9%
Other82.6%
Relational Databases Tools
 

Featured Reviews

Nasir Niamat - PeerSpot reviewer
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.
Gus Mtz - PeerSpot reviewer
Availability and financial reporting thrive with robust integration tools
The best features of SQL Server are availability and stability. We never have concerns about the database. The ability of SQL Server to integrate with other Microsoft services, such as Azure for supporting business intelligence or data analytics, is primarily through Power BI for analytics tools. We use Power BI, but not in the cloud. We have interfaces with other databases. We extensively use the ETL tools of SQL Server for integrating with other databases or text files. The ETL tools are excellent for making jobs that run daily or hourly. For disaster recovery features supporting mission-critical applications in our organization, we have implemented the high availability feature of SQL Server. The always-on feature provides high availability in SQL Server. We use this tool daily for our risk management application.

Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Pros

"Replication is a valuable feature and easy to use."
"The stability is incredible. I have customers with uptimes of several years."
"It supports in-house-built applications in .NET and VB6"
"It supports multiple applications and business intelligence tools."
"Replication, all levels of replication, query charting, and the MongoDB embedded are the most valuable features of this solution."
"So far, we do not have a lot of issues. It's pretty problem-free."
"The solution's stability, performance, enhanced functionality, and replication are all great features."
"IBM Informix benefits users with high availability and good integration capabilities."
"Its security is good. The GUI of SQL Server is also very good."
"SQL Server is very scalable because we use it across a couple of different types of applications, such as micro-infrastructure setup and server farm."
"I have found that SQL Server works very well in the Microsoft Dynamics environment."
"The pricing of the product is very good."
"The documentation and manuals are very good."
"The pricing of the solution is okay. It's less expensive than Oracle, for example."
"The most valuable feature of SQL Server is the performance."
"We like business integration, database, and analysis."
 

Cons

"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 pricing is a bit expensive."
"This solution is in need of more current tools."
"The technical support services need substantial improvement."
"The solution lacks some functionality."
"There should be more intelligence surrounding discovering data to be able to automatically create indexes."
"Every month or every second month, we find some bugs in it, which is not ideal."
"I experienced poor input/output (IO) performance."
"The product overall would benefit from the addition of better tutorials to help master the skills necessary to actually build a project database. Right now, what is available isn't sufficient."
"SQL Server could improve by being more user-friendly, it is still geared towards specialists. Additionally, the monitoring system is difficult to use, not everyone can use it well. The configuration should be able to be done through the GUI."
"SQL Server has good performance, but it 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."
"Other than Synapse and the other version of SQL Server, they face some problems while processing the data."
"Microsoft doesn't have active-active load balancing scenarios. It's always a failover cluster."
"SQL Server could improve the integration with nonrational database solutions, such as MongoDB."
"The interface integration could be better."
 

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."
"We have had to purchase the Enterprise version to the tune of a few hundred thousand dollars, which is just ridiculous."
"You need to pay for the license. It most probably has per-core licensing."
"The price of the solution could be reduced, it is expensive."
"SQL Server is expensive if you use the advanced SQL version, but if you use the standard version, it's not expensive."
"It is expensive, but you get what you pay for."
"The product is expensive."
"SQL Server is an expensive solution."
"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."
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Top Industries

By visitors reading reviews
Financial Services Firm
10%
Computer Software Company
10%
Manufacturing Company
8%
University
7%
Financial Services Firm
15%
Computer Software Company
11%
Manufacturing Company
9%
Government
6%
 

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 Business121
Midsize Enterprise58
Large Enterprise112
 

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: September 2025.
871,358 professionals have used our research since 2012.