No more typing reviews! Try our Samantha, our new voice AI agent.

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
25th
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 May 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 10.7%, down from 17.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Relational Databases Tools Mindshare Distribution
ProductMindshare (%)
SQL Server10.7%
IBM Informix1.8%
Other87.5%
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."
"Informix can support huge quantities of data with less memory and less capacity."
"It supports multiple applications and business intelligence tools."
"IBM Informix benefits users with high availability and good integration capabilities."
"The initial setup is very simple."
"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."
"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."
"The solution is quite stable and reliable; we use it mainly due to its general stable nature."
"There was an online system in which we had about 2500 requests to the DB per second. Every request had a completion window of one second to process and retrieve data. After switching to SQL Server, and AlwaysOn, and Snapshot, and tinkering, and configuring and tinkering, the handling capacity we measured increased to about 5000 requests per second, while the time decreased to 0.5 seconds per request."
"We found it to be quite scalable."
"SQL Server is easier to use than Oracle, programming-wise, and it is the latest technology and pretty powerful in terms of the high availability of the virtual server."
"You could have an offsite and an onsite, and if the onsite goes down, the offsite picks it up. I like that flexibility to provide continuing operations."
"It's a normal DMS, so it can be used everywhere you want to use any RDBMS or relational database."
"The most valuable feature of SQL Server is the performance."
"The product’s most valuable features are flexibility and scalability."
"Its availability for a secured server is one of its most valuable features, and its replication features are valuable because we can manage eight replicas, while their clustering and availability groups are also valuable."
 

Cons

"In my opinion, the packages could be improved. The version I use doesn't allow for packages. I can do some general procedures, but no packages like in Oracle. So, develop separate modules in SQL language. This would be most beneficial for me."
"The technical support services need substantial improvement."
"I would like to see backups from secondary servers."
"The product needs a lot more marketing involvement from IBM."
"The pricing is a bit expensive."
"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 solution really doesn't add new features very often."
"This solution is in need of more current tools."
"Since this is a relational order system, scalability has a limit. If your system is very big, you need bigger servers and you have to spend more money. We scale a system up to a certain level, and then we move or shift data to the warehouse, which is NoSQL. We then do not have any bottleneck in scaling. For using this technique we are happy with it."
"From a DB administrator perspective, I would like to see more space requirements and space capacity history, so that we are able to see which DBs are growing, and by how much per day or week."
"SQL Server doesn't have proper bitmap indexing, proper columnar databases, or proper implementation of materialized views."
"In my experience, I've found that scalability can be improved."
"Few in SSIS Realtime data refresh in SSRS More datasources in Power BI"
"It is very costly, and that's the reason people are moving away from SQL Server."
"The performance needs some improvement and it needs more features integrated into it."
"As we have faced problems with the solution in both the past and present, I feel it could be more stable."
 

Pricing and Cost Advice

"The product has reasonable pricing. We purchase its yearly license."
"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’s price depends on the specific server requirements."
"There is a license required to use the solution and I am satisfied."
"For smaller companies, they find this solution expensive."
"Licensing fees are paid on a yearly basis."
"We pay approximately $12,000 USD per month for both the server and the license."
"There is a license required for servers and for the POS we use the free version. The free version allows you to have tables and a total database size of approximately 10 GB, which is enough for our requirements."
"I don't know the exact prices because my focus is essentially technical and not on the bills. A few years ago, they changed the billing policy for the Enterprise Edition, and it became less attractive. But I believe they are still cheaper than Oracle. SQL Server isn't cheap, but it's not expensive either."
"Their options for concurrency and locking are good, as well as their prices."
report
Use our free recommendation engine to learn which Relational Databases Tools solutions are best for your needs.
892,868 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Comms Service Provider
9%
Construction Company
8%
Financial Services Firm
8%
University
7%
Financial Services Firm
40%
Manufacturing Company
6%
Computer Software Company
4%
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.
892,868 professionals have used our research since 2012.