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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 initial setup is pretty easy."
"The solution's stability, performance, enhanced functionality, and replication are all great features."
"So far, we do not have a lot of issues. It's pretty problem-free."
"The scalability is very good."
"IBM Informix benefits users with high availability and good integration capabilities."
"It supports in-house-built applications in .NET and VB6"
"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."
"It is very easy to install IBM Informix, very easy to scale, and support is quite better."
"The solution is very easy to use."
"It integrates well with other platforms."
"It's easy to use and fairly intuitive. I do development and data analysis, so we do a lot of work with SSIS and SQL Job Scheduler. Deploying new databases is very simple with things like BACPAC."
"It's a very capable, efficient, price-performant OLAP server."
"The most valuable feature of SQL Server is the performance."
"The interface for building the queries or writing the store procedures is good."
"The columnstore index feature is useful for us, and we also use the integration services. It is also very stable."
"The performance of the SQL Server is very good."
 

Cons

"I experienced poor input/output (IO) performance."
"Continue extending the SQL language for compatibility with the competition's language, including Stored Procedure Language."
"The support team could include local engineers to establish efficient communication. It will help us speed up the escalation process."
"This solution is in need of more current tools."
"The pricing is a bit expensive."
"It would be helpful to have IBM salespeople know that Informix exists, and sell it. Currently, it is completely ignored by IBM."
"The technical support services need substantial improvement."
"This product could be made easier to use for beginners."
"There was a time when Microsoft support provided very crisp answers, but over time, they have diluted their support to third parties, leading to a drop in support quality, which restricts me from giving a perfect 10, as post-sales service is crucial."
"The solution could be more secure."
"It will be very useful to have high-level database monitoring. It should also have built-in business intelligence reporting."
"The product performance can become slow when the data reaches sizes like a terabyte."
"If you are a new user then this solution could be difficult, they could improve by making the overall usage easier."
"The ability to connect with other environments needs to be improved."
"SQL Server database capacities could be further increased to be more accessible for larger data requirements."
"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. Having so many different licensing options makes it difficult to decide which one to choose from. They can club things together. This is an area where they can make things easier for customers."
 

Pricing and Cost Advice

"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."
"I am not aware of the licensing costs or terms."
"We purchased our license and the pricing is fine for us."
"We're looking at alternative solutions because we think Microsoft's licensing costs have been expensive."
"The price for the Standard Edition is approximately $3,000 USD per core. Once you include technical support, SQL Server is cheaper than PostgreSQL and MySQL."
"My advice is quite straightforward. If you know the number of users who really and truly need access to the Server then it is a no-brainer. If you do not know, then get the basic package and minimum licenses and start from there. Needless to say, users can develop/use data structures outside and then deploy onto the Server."
"The price has been going higher and higher. The market is quite price sensitive."
"The price of SQL Server is great. In my company, SQL Server is part of the Microsoft Suite, we don't have to pay for any additional license costs, it's quite cost-effective for us."
"The price of SQL Server could be reduced, the license is expensive. We have an annual subscription."
"I don't need a license for it as I will be migrating to Office 365."
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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.
884,873 professionals have used our research since 2012.