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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 February 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 11.8%, down from 19.4% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Relational Databases Tools Market Share Distribution
ProductMarket Share (%)
SQL Server11.8%
IBM Informix1.8%
Other86.4%
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

"It is very easy to install IBM Informix, very easy to scale, and support is quite better."
"The scalability is very good."
"IBM Informix benefits users with high availability and good integration capabilities."
"The solution's stability, performance, enhanced functionality, and replication are all great features."
"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."
"The initial setup is pretty easy."
"So far, we do not have a lot of issues. It's pretty problem-free."
"Replication, all levels of replication, query charting, and the MongoDB embedded are the most valuable features of this solution."
"Very stable relational database management system that offers ease of management, querying, and scaling. It has well-designed databases."
"The initial setup isn't overly complex."
"I like that the new version has a memory-optimized table to improve the performance."
"Agent service is a good feature of SQL Server, where you can schedule certain tasks."
"It is a typical database solution, and it is working well so far. It is easy to use, and it is also very common and popular, which makes it easy to find a support partner."
"The pricing of the product is very good."
"The solution has a reliable database."
"For my business requirements, the performance is good."
 

Cons

"Continue extending the SQL language for compatibility with the competition's language, including Stored Procedure Language."
"Every month or every second month, we find some bugs in it, which is not ideal."
"I would like to see backups from secondary servers."
"There should be more intelligence surrounding discovering data to be able to automatically create indexes."
"The solution lacks some functionality."
"The technical support services need substantial improvement."
"It would be helpful to have IBM salespeople know that Informix exists, and sell it. Currently, it is completely ignored by IBM."
"This product could be made easier to use for beginners."
"One thing I don't like about SQL Server is the way they've set up security with users and groups. It just doesn't seem that intuitive to me. Adding some more explanatory information might help some."
"Query optimitzer could be simplified."
"Something that could be improved is the cost because it's very high. That's the only thing I'm concerned about but the technology is good."
"The agility of the non-SQL-based features is relevant on the market."
"SQL Server could improve by providing something similar to an interface or dashboard where a developer can do debugging, this would make a developer's work easier. Additionally, the optimization could be better. If there was an interface showing information needed for the optimization it would help because there can be some data loss making it difficult to optimize the SQL Server."
"Our biggest problem with SQL Server is latency. The communication between the cloud and the on-premises environment is slow. The data needs to be encrypted for security, and you have to exchange data certificates between environments. You can adjust the configuration to improve performance, but it would be nice if SQL Server had some templates to resolve problems."
"It will be very useful to have high-level database monitoring. It should also have built-in business intelligence reporting."
"There should be more security updates for the product."
 

Pricing and Cost Advice

"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."
"The product has reasonable pricing. We purchase its yearly license."
"I am not aware of the licensing costs or terms."
"Its licensing is yearly. There are no additional costs. There is only the subscription license."
"There is a license required for this solution. One of the problems is for smaller businesses to purchases a license because it is expensive for a lot of them to afford."
"The cost associated with SQL Servers is on the higher side."
"We pay per second of usage, but there are different offerings of the license."
"On a scale from one to ten, where one is cheap and ten is expensive, I rate the solution's pricing a seven out of ten."
"We are on an annual enterprise license for the solution and the cost of the license could be reduced."
"It costs a lot."
"Although it comes with a cost, using the most recent version is highly advisable, since it would ensure a certain measure of bug fixes and stability. The sole issue would involve the cost, as this is expensive."
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Top Industries

By visitors reading reviews
Financial Services Firm
9%
Computer Software Company
8%
University
8%
Comms Service Provider
7%
Financial Services Firm
38%
Computer Software Company
7%
Manufacturing Company
6%
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 do you like most about IBM Informix?
It supports multiple applications and business intelligence tools.
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...
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: February 2026.
881,455 professionals have used our research since 2012.