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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
24th
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 April 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 11.2%, down from 17.9% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Relational Databases Tools Mindshare Distribution
ProductMindshare (%)
SQL Server11.2%
IBM Informix1.8%
Other87.0%
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

"Every version is faster than the previous."
"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."
"So far, we do not have a lot of issues. It's pretty problem-free."
"Flexible Grid provides the ability to automatically create database objects, such as tables, indexes, and stored procedures on all nodes within the grid as a single operation."
"Replication, all levels of replication, query charting, and the MongoDB embedded are the most valuable features of this solution."
"Not looking at Informix would really mean a shot in your own leg before walking a long distance."
"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."
"The solution is quite stable and reliable; we use it mainly due to its general stable nature."
"The initial setup was straightforward."
"The solution is very common. It's easy to use."
"However, Microsoft SQL servers are a very trusted product."
"PaaS is a modern, scalable database, it is very easy, and you don't have to worry about versions and upgrades because Microsoft keeps on adding new features to this solution."
"I would recommend SQL Server for its stability, scalability, and ease of use."
"The product’s most valuable features are flexibility and scalability."
"The installation was straightforward. We did not have a large installation and it took a couple of weeks to complete."
"SQL Server is easy to manage because all our DevOps team are familiar with it and simple to access because it is cloud-based."
 

Cons

"This product could be made easier to use for beginners."
"The solution doesn't include functionality like data anonymization."
"This solution is in need of more current tools."
"The technical support services need substantial improvement."
"The pricing is a bit expensive."
"This product could be made easier to use for beginners."
"This solution is in need of more current tools."
"I would like to see backups from secondary servers."
"In terms of improvement, it could use more integration with other products."
"Query optimitzer could be simplified."
"SQL is a highly unstable server - there are patch updates on the Windows server every week, which is why we only use it for non-critical systems."
"The Standard Edition and Enterprise Edition have certain limitations."
"SQL Server could improve by increasing the performance, it cannot handle large amounts of data."
"When reviewing SQL processes it would be great if all of the local processes on the SQL server were marshaled to a remote SSMS client."
"Setting up some of the more complex systems could be simpler."
"The Always ON (High Availability) functionality is support only with the MS SQL enterprise edition."
 

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."
"For me, it's always too expensive."
"The product has reasonable pricing. We purchase its yearly license."
"I am not aware of the licensing costs or terms."
"Pricing is a bit on the higher side."
"We have had to purchase the Enterprise version to the tune of a few hundred thousand dollars, which is just ridiculous."
"The enterprise-level license agreement is very complicated."
"We didn't have any licensing costs for SQL Server."
"This is a downside of enterprise Microsoft products."
"​It has the easiest licensing."
"Depending upon your usage, you can use the pay-as-you-go model for a short period of time. For longer projects, we can opt for one-year or a three-year license."
"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."
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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
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 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.
886,858 professionals have used our research since 2012.