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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 March 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 11.9%, down from 18.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Relational Databases Tools Mindshare Distribution
ProductMindshare (%)
SQL Server11.9%
IBM Informix1.8%
Other86.3%
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

"Overall, this is a great product. It works really well, is very stable, and is very scalable."
"Replication, all levels of replication, query charting, and the MongoDB embedded are the most valuable features of this solution."
"OLTP processing capacity and the availability of information with high availability implementation have been significantly improved."
"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."
"Every version is faster than the previous."
"The stability is incredible. I have customers with uptimes of several years."
"Informix can support huge quantities of data with less memory and less capacity."
"The scalability is very good."
"Features like autoscaling, business continuity, and security are beneficial. The tool's compatibility with almost all of the enterprise-class applications is also beneficial for users."
"We are using it for accounts payable and accounts receivable automation."
"It is an overall very good product."
"The most valuable feature is easy installation. It was very easy to install."
"SQL Server is a very good product and we use Microsoft SQL Server software that runs on Windows as most of our clients make use of the Windows operating system."
"SQL SSIS is the most useful aspect of the solution."
"MS SQL is the easiest of the three I tried."
"SQL Server is quite user-friendly. I have experience with Oracle and PostgreSQL, so out of three, I like SQL Server a lot."
 

Cons

"This solution is in need of more current tools."
"I experienced poor input/output (IO) performance."
"The solution doesn't include functionality like data anonymization."
"I really would love to have a QT plugin."
"The support team could include local engineers to establish efficient communication. It will help us speed up the escalation process."
"There should be more intelligence surrounding discovering data to be able to automatically create indexes."
"This product could be made easier to use for beginners."
"I would like to see backups from secondary servers."
"If you are a new user then this solution could be difficult, they could improve by making the overall usage easier."
"Analysis services have a lot of room for improvement. Basically, manageability on the available tools; they are not very efficient and my main headache is with the analysis service."
"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."
"I would like to see native plugins built for other platforms versus having to buy third-party plugins to tap into S3 buckets and AWS Cloud. Right now, it does not have those built-in plugins."
"I have no choice, our customer choose MS SQL."
"Sometimes we experience issues with its stability."
"There should be more security updates for the product."
"The free version of SQL Server is time-limited before updating to the paid version."
 

Pricing and Cost Advice

"I am not aware of the licensing costs or terms."
"The product has reasonable pricing. We purchase its yearly license."
"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."
"For me, it's always too expensive."
"We're looking at alternative solutions because we think Microsoft's licensing costs have been expensive."
"We have an enterprise license, which we consider to be fine."
"Synapse is a bit costly. If I compare it with different databases, I think it's a reasonable price"
"The licensing is on an annual basis."
"The price has been going higher and higher. The market is quite price sensitive."
"We pay per second of usage, but there are different offerings of the license."
"SQL Server is expensive if you use the advanced SQL version, but if you use the standard version, it's not expensive."
"I don't know the exact prices because my focus is essentially technical and not on the bills. A few years ago, they changed the billing policy for the Enterprise Edition, and it became less attractive. But I believe they are still cheaper than Oracle. SQL Server isn't cheap, but it's not expensive either."
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Top Industries

By visitors reading reviews
Comms Service Provider
8%
University
8%
Construction Company
7%
Computer Software Company
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 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: March 2026.
885,286 professionals have used our research since 2012.