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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

"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 supports in-house-built applications in .NET and VB6"
"Replication, all levels of replication, query charting, and the MongoDB embedded are the most valuable features of this solution."
"The solution's stability, performance, enhanced functionality, and replication are all great features."
"The initial setup is pretty easy."
"The scalability is very good."
"IBM Informix benefits users with high availability and good integration capabilities."
"So far, we do not have a lot of issues. It's pretty problem-free."
"They have improved the UI and ease of accessing the database and server which is good. You can load it up and start using it from the very minute it is implemented."
"Having everything in one centralized set of databases is the most valuable feature."
"It is a very user-friendly solution. It is easy to manage the databases and troubleshoot any issue. It is a perfect solution for the volume or transactions that we need to manage."
"Similar to Microsoft SQL, it is easy to scale."
"Easy to implement and user-friendly relational database management system. This product is stable and scalable."
"The most valuable feature would most likely be querying. We query a lot, we use a lot of stored procedures. As for other features, such as replication and all other more fancy features we don't use them the most. I do not know, but perhaps the DBAs would be the best people who know of the features that they use, but as far as how I use it, it's just for querying and running stored procedures. We use the bare minimum features."
"It's great that the database engine is always on."
"I like that it's relatively stable."
 

Cons

"The support team could include local engineers to establish efficient communication. It will help us speed up the escalation process."
"This product could be made easier to use for beginners."
"I experienced poor input/output (IO) performance."
"The pricing is a bit expensive."
"There should be more intelligence surrounding discovering data to be able to automatically create indexes."
"Continue extending the SQL language for compatibility with the competition's language, including Stored Procedure Language."
"I would like to see backups from secondary servers."
"The solution really doesn't add new features very often."
"The solution is rather expensive."
"I would like to have the option to use fewer processors for certain tasks, thus reducing the licensing fee."
"It can be better if it enables the use of AI functions."
"Microsoft support is an issue unto itself."
"The stability of the solution should be improved in the next release. Sometimes it is great, sometimes it is troublesome. I would also like data conversion and the code pages to be a bit more straightforward."
"The solution could improve by having more integration with other operating systems and other platforms."
"Performance could be better. But I don't know if it's a problem with my application or with my database."
"The configuration process can be a little complex."
 

Pricing and Cost Advice

"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."
"For me, it's always too expensive."
"This solution is available at a much lower price point than Oracle."
"The product's price is reasonable."
"Cost is a major derivative for any organization. It has a reasonable cost value, and its cloud support is also better than others. Comparatively, Oracle can do the same things or is even better in certain areas, but it is expensive. The cost along with the support are the plus factors for SQL Server."
"SQL Server's pricing has proven satisfactory for our market range."
"It is expensive, especially when you have open-source products that are just about as functional and they're free. They might want to consider re-evaluating their pricing. We purchased it in retail. It was somewhere in the neighborhood of 9,000. There is just the standard licensing fee. If they migrate this product the way they're trying to do everything else, eventually, it is going to be subscription-based, which is going to suck, but that's the way the industry is going, so it is what it is."
"To scale the solution there are additional costs."
"SQL Server is a cost-effective solution for a small database."
"The product’s price depends on the specific server requirements."
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Top Industries

By visitors reading reviews
University
8%
Comms Service Provider
8%
Computer Software Company
7%
Financial Services Firm
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.
884,797 professionals have used our research since 2012.