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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
25th
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 May 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 10.7%, down from 17.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Relational Databases Tools Mindshare Distribution
ProductMindshare (%)
SQL Server10.7%
IBM Informix1.8%
Other87.5%
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

"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."
"We don't have any problems with the Informix Database."
"OLTP processing capacity and the availability of information with high availability implementation have been significantly improved."
"Not looking at Informix would really mean a shot in your own leg before walking a long distance."
"Every version is faster than the previous."
"So far, we do not have a lot of issues. It's pretty problem-free."
"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."
"Its stability delivers performance and usability."
"The solution has proven to be very stable."
"The solution is extremely stable; it's got an amazing backup repository system and a fail-safe system for any type of data loss, with backups stored on a day-to-day or even hourly basis and the ability to restore critical, recent, or archive data relatively fast."
"The solution is valuable because it seamlessly extracts reports and enables the collection of information from different tables."
"Having everything in one centralized set of databases is the most valuable feature."
"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."
"The most valuable feature is the system architecture."
"We use it as part of our product, so it is helpful for us."
 

Cons

"I really would love to have a QT plugin."
"The solution really doesn't add new features very often."
"There should be more intelligence surrounding discovering data to be able to automatically create indexes."
"I really would love to have a QT plugin."
"Every month or every second month, we find some bugs in it, which is not ideal."
"The solution lacks some functionality."
"This product could be made easier to use for beginners."
"The solution really doesn't add new features very often. Other solutions are much more actively pushing out upgrades and improvements."
"I would like to have the option to use fewer processors for certain tasks, thus reducing the licensing fee."
"They have too many licensing options. They may want to simplify its licensing and bring it down to two, three, or four categories from ten to fifteen categories."
"If SQL Server could perhaps run on Linux, that would be good."
"SQL Server has a tendency to consume all the memory you allow it to. If you are not careful, you can basically break your server."
"The documentation could be much better. It's lacking right now."
"The maintenance and tasks should be improved so as to reduce database files."
"As a software developer, it can be hard to do something in Oracle that is SQL Server specific, and vice-versa, sometimes."
"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."
 

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."
"For me, it's always too expensive."
"The product has reasonable pricing. We purchase its yearly license."
"SQL Server offers three versions. You can get a free trial for 30 days."
"Their options for concurrency and locking are good, as well as their prices."
"Since we are a cloud-based company, there is AWS pricing on top of the SQL Server pricing. The Enterprise Edition can typically sell from around $1000 dollars a month, which is not cheap. Then, there is an additional one-time Windows cost, based on the code, which can go anywhere from $30,000 to $40,000 for the license."
"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."
"There is a license required for this solution and we pay monthly. The price is reasonable compared to other solutions."
"There is a license required for the use of SQL Server and we are on an annual subscription."
"I would rate the tool's pricing a six out of ten. It is not extremely cheap but also it's not the most expensive product."
"It is something we have been using for a lot of years. If we're paying, it should be reasonable."
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Top Industries

By visitors reading reviews
Comms Service Provider
9%
Construction Company
8%
Financial Services Firm
8%
University
7%
Financial Services Firm
39%
Manufacturing Company
6%
Computer Software Company
4%
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 Enterprise118
 

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.
893,164 professionals have used our research since 2012.