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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 (10th)
SQL Server
Ranking in Relational Databases Tools
1st
Average Rating
8.4
Reviews Sentiment
6.8
Number of Reviews
270
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of November 2025, in the Relational Databases Tools category, the mindshare of IBM Informix is 1.9%, up from 1.7% compared to the previous year. The mindshare of SQL Server is 14.6%, down from 21.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Relational Databases Tools Market Share Distribution
ProductMarket Share (%)
SQL Server14.6%
IBM Informix1.9%
Other83.5%
Relational Databases Tools
 

Featured Reviews

Nasir Niamat - PeerSpot reviewer
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.
Gus Mtz - PeerSpot reviewer
Availability and financial reporting thrive with robust integration tools
The best features of SQL Server are availability and stability. We never have concerns about the database. The ability of SQL Server to integrate with other Microsoft services, such as Azure for supporting business intelligence or data analytics, is primarily through Power BI for analytics tools. We use Power BI, but not in the cloud. We have interfaces with other databases. We extensively use the ETL tools of SQL Server for integrating with other databases or text files. The ETL tools are excellent for making jobs that run daily or hourly. For disaster recovery features supporting mission-critical applications in our organization, we have implemented the high availability feature of SQL Server. The always-on feature provides high availability in SQL Server. We use this tool daily for our risk management application.

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 initial setup is pretty easy."
"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."
"It supports multiple applications and business intelligence tools."
"The scalability is very good."
"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."
"Every version is faster than the previous."
"The solution is stable."
"The ability to see tables, reviews, and custom script options is good."
"The solution is very common. It's easy to use."
"SQL Server provides good performance. Most of the SQL solutions can be integrated and this solution is no different, you are able to link other databases. For example, we have Oracle running a Postgres Server and it is linked. It follows the ISO standard when it comes to commands, it works well."
"The solution's most valuable feature is that we can set up redundant databases and replication in the databases."
"We have many users, between 50 and 100 using the SQL Server product."
"SQL Server is definitely easy to use, and with the volume that we have, it's also stable."
"The solution can be used for a host of applications."
 

Cons

"The solution lacks some functionality."
"This product could be made easier to use for beginners."
"This solution is in need of more current tools."
"The solution really doesn't add new features very often."
"Continue extending the SQL language for compatibility with the competition's language, including Stored Procedure Language."
"The technical support services need substantial improvement."
"Every month or every second month, we find some bugs in it, which is not ideal."
"The support team could include local engineers to establish efficient communication. It will help us speed up the escalation process."
"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."
"The pricing and quality of the product could be improved."
"Primarily, the data replication and the backup areas can be improved. It should have data replication capabilities and uptime capabilities."
"There should be more tools and documentation for tuning the performance of Microsoft SQL Server. It would be nice to have more tools for tuning because currently, all the tuning that we have to do with our databases is almost manual. We have to read a bunch of knowledge base articles, and this information should be better documented. Its free text search should also be improved. It is quite important for us. Currently, we're developing our own free text search because of the lacking flexibility in Microsoft SQL Server. Therefore, we're kind of using elastic search and making different implementations in order to reach our targets. Using just the native free text search of Microsoft SQL Server is not enough for us. It should have more flexible features as compared to the current version."
"Sometimes, the tool doesn't support all the native features, and because of this, our company has to customize it to meet our requirements, which is a challenging process for our company's engineers."
"The tool's support needs to be improved."
"The treatment of database storage could be improved."
 

Pricing and Cost Advice

"For me, it's always too expensive."
"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."
"The product has reasonable pricing. We purchase its yearly license."
"The product's price is reasonable."
"There is a license required for this solution and we pay monthly. The price is reasonable compared to other solutions."
"There is a license required for the use of SQL Server and we are on an annual subscription."
"For our purpose, we are not required to have a license for what we are using it for."
"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."
"SQL Server's pricing has proven satisfactory for our market range."
"We have had to purchase the Enterprise version to the tune of a few hundred thousand dollars, which is just ridiculous."
"We did a one-time payment. Its price, in general, can be reduced."
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Top Industries

By visitors reading reviews
Computer Software Company
11%
Financial Services Firm
9%
Manufacturing Company
8%
Comms Service Provider
7%
Financial Services Firm
15%
Computer Software Company
11%
Manufacturing Company
10%
Government
6%
 

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 Business121
Midsize Enterprise58
Large Enterprise112
 

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: September 2025.
872,837 professionals have used our research since 2012.