No more typing reviews! Try our Samantha, our new voice AI agent.

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

"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."
"Every version is faster than the previous."
"We don't have any problems with the Informix Database."
"The scalability is very good."
"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."
"Replication, all levels of replication, query charting, and the MongoDB embedded are the most valuable features of this solution."
"My advice is to take it; you will never regret it."
"The performance of SQL Server is perfect."
"The most valuable feature of the solution, compared to other RDBMS solutions, such as Oracle MySQL or IBM DB2, it is more user-friendly and has backward compatibility. For example, if you have an application that requires an old version of SQL Server and you have the latest version of the license, you are able to install and use it in backward compatibility mode. They keep supporting the existing legacy application."
"We've mostly been pretty happy with its performance."
"We used SQL Server to store all of our lab data on the database, with a front-end application that needed SQL in the background for archiving all the laboratory data."
"SQL Server is pretty much bulletproof; it just runs."
"The tool helps us by being available always."
"I feel that this is the simplest of solutions; it is user-friendly, is a robust tool and is always reliable to users."
"Overall, we've had a positive experience with the solution."
 

Cons

"The pricing is a bit expensive."
"Every month or every second month, we find some bugs in it, which is not ideal."
"This product could be made easier to use for beginners."
"There should be more intelligence surrounding discovering data to be able to automatically create indexes."
"This solution is in need of more current tools."
"I really would love to have a QT plugin."
"The solution really doesn't add new features very often. Other solutions are much more actively pushing out upgrades and improvements."
"The solution lacks some functionality."
"We pay a license fee, it could always be cheaper."
"I would like to see improvements made to the stability of SQL Server, as well as more analytics requirements."
"Performance could be better. But I don't know if it's a problem with my application or with my database."
"The solution could offer more integration with other platforms."
"I would like to see SQL Server add the ability to write to multiple sites or support replication between multiple sites at the transaction level."
"It's difficult to make changes. It's a very complicated product in general — that's the issue."
"The solution could improve by being more user-friendly."
"The GUI needs improvement. From a technical perspective, it's quite complex, which may not be a problem for individuals with technical backgrounds like ours, especially since we've encountered similar interfaces. However, navigating the GUI can be challenging for newcomers or product owners without technical experience. For example, as someone transitioning from a developer role to a product management role, I find it relatively easy to use the GUI. But for those without a technical background, it's much more challenging to grasp what's happening."
 

Pricing and Cost Advice

"The product has reasonable pricing. We purchase its yearly license."
"I am not aware of the licensing costs or terms."
"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."
"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."
"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."
"SQL Server is a cost-effective solution for a small database."
"SQL Server is an expensive solution."
"Their options for concurrency and locking are good, as well as their prices."
"This is a very cheap product."
"SQL Server has the best licensing price."
"The price could be cheaper."
report
Use our free recommendation engine to learn which Relational Databases Tools solutions are best for your needs.
885,311 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Construction Company
9%
Comms Service Provider
8%
University
8%
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.
885,311 professionals have used our research since 2012.