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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."
"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."
"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."
"My advice is to take it; you will never regret it."
"Without any doubt the Integration Services and Analysis Services are the most widely used. These are the basis for data quality, data gathering, ETL process, as well as collation for the data warehouse, Cube-generation, and ad-hoc processes. The ease in which you may mold a process flow or even modularly add in new structures is something which is much needed in my job."
"Microsoft SQL Server is one of the better database administration software packages out there. It runs primarily on Windows Server platforms, but it can also run on Linux platforms."
"Since we can automate most of our tasks, it means that the management is very easy."
"I love SQL Server's Common Table Expression. In addition to that, I like its lead and lag functions. That helped us reduce a lot of code when comparing rows in SQL Server."
"The most valuable features of SQL Server are the speed, great support, and it is from a known vendor."
"The solution is great for creating backups."
"It is integrated with Microsoft tools."
"SQL Server is very scalable because we use it across a couple of different types of applications, such as micro-infrastructure setup and server farm."
 

Cons

"The solution lacks some functionality."
"For me, it's always too expensive. The problem is that Informix sometimes competes with free products, so yes, it's very expensive, but when we're talking about licensed products like SQL Server or anything, the midsize pricing could be significantly improved."
"The pricing is a bit expensive."
"The solution should offer replication. It would be helpful if the solution would allow us to access third-party tools."
"This solution is in need of more current tools."
"I would like to see backups from secondary servers."
"The solution really doesn't add new features very often. Other solutions are much more actively pushing out upgrades and improvements."
"The solution really doesn't add new features very often."
"I would like to have the ability to restore backups in the next release."
"Microsoft doesn't have active-active load balancing scenarios. It's always a failover cluster."
"Due to the fact that I'm dealing with the product more as a data analyst, the SQL Server management studio is really relatively primitive compared to other more advanced tools."
"We experience latency at times when there is a lot of data being processed."
"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."
"Performance could be improved."
"SQL Server could integrate better with other platforms."
"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

"For me, it's always too expensive."
"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."
"I am not aware of the licensing costs or terms."
"With recent releases, the Standard Edition (cheaper) SKU has some of the earlier version Enterprise features. SQL Express has some limitations."
"We purchased our license and the pricing is fine for us."
"Its licensing is yearly. There are no additional costs. There is only the subscription license."
"There is no licensing cost for SQL Server."
"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."
"We're looking at alternative solutions because we think Microsoft's licensing costs have been expensive."
"It's cheaper than Oracle."
"The licensing is on an annual basis."
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Top Industries

By visitors reading reviews
Comms Service Provider
8%
University
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.
884,976 professionals have used our research since 2012.