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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

"Not looking at Informix would really mean a shot in your own leg before walking a long distance."
"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."
"OLTP processing capacity and the availability of information with high availability implementation have been significantly improved."
"Replication, all levels of replication, query charting, and the MongoDB embedded are the most valuable features of this solution."
"Every version is faster than the previous."
"So far, we do not have a lot of issues. It's pretty problem-free."
"We don't have any problems with the Informix Database."
"Replication is a valuable feature and easy to use."
"The setup process is straightforward."
"It integrates well with other platforms."
"Now we can supply a 16-core, 15TB, data warehouse loading hundreds of thousands of transactions per day for $100,000 purchase or cheaper via hosting partners."
"We use the solution both on the cloud and on-premises and we have been pleased with its capabilities overall."
"It is a typical database solution, and it is working well so far; it is easy to use, and it is also very common and popular, which makes it easy to find a support partner."
"SQL Server is a good solution for me."
"My experience is limited, but compared with Oracle, Microsoft SQL Server is many times better and easier to program with."
"Its speed and the ease of server management are valuable. If I compare Microsoft SQL Server to MySQL, what I like in Microsoft SQL Server is the speed. We are using Microsoft Management Studio for managing our Microsoft SQL Server, and the user interface that I get to work with is also better."
 

Cons

"Every month or every second month, we find some bugs in it, which is not ideal."
"I would like to see backups from secondary servers."
"The product needs a lot more marketing involvement from IBM."
"I really would love to have a QT plugin."
"I would like to see backups from secondary servers."
"I really would love to have a QT plugin."
"The solution doesn't include functionality like data anonymization."
"This solution is in need of more current tools."
"Improvements to the indexing, columnstore indexing, and high availability groups are good improvements for future versions."
"You do need to have technical knowledge in order to install the solution. It's not something a layperson can do."
"The user interface can be improved through the adoption of the intuitive interaction design of the MS Office 2013 applications."
"Right now, the tool you use to query the system updates every month. It pesters you to update the Client every month when there is nothing new that you really need to add, but it is constantly pestering you."
"There is room for improvement in performance when managing a large quality of data and a high number of active users."
"The pricing could be more affordable."
"Linux-based editions are not yet proven to be on par with Windows deployments."
"I would like the SQL Server to be able to provide cloud support. We use the solution with a Korean provider supporting only MySQL rather than Microsoft SQL Server, which would be preferable and cheaper. This would prevent us from having to pay for troubleshooting and hosting the server."
 

Pricing and Cost Advice

"I am not aware of the licensing costs or terms."
"The product has reasonable pricing. We purchase its yearly license."
"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 price could be cheaper."
"We have had to purchase the Enterprise version to the tune of a few hundred thousand dollars, which is just ridiculous."
"Currently, almost all of my machines are in Azure and I think it is the best way of licensing now (VM+software)."
"It is expensive, but you get what you pay for."
"There is no licensing cost for SQL Server."
"Pricing is a bit on the higher side."
"The cost associated with SQL Servers is on the higher side."
"For medium-sized customers who don't need some enterprise features, the tool would be available for 200 USD per month. For the enterprise segment, the tool's cost can go up to 6,000 USD."
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Top Industries

By visitors reading reviews
Construction Company
8%
Comms Service Provider
8%
Financial Services Firm
8%
University
7%
Financial Services Firm
39%
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 Enterprise117
 

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.
886,468 professionals have used our research since 2012.