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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

"We don't have any problems with the Informix Database."
"Not looking at Informix would really mean a shot in your own leg before walking a long distance."
"My advice is to take it; you will never regret it."
"The solution is quite stable and reliable; we use it mainly due to its general stable nature."
"The stability is incredible. I have customers with uptimes of several years."
"Replication is a valuable feature and easy to use."
"It is very easy to install IBM Informix, very easy to scale, and support is quite better."
"IBM Informix benefits users with high availability and good integration capabilities."
"This is an excellent solution when it comes to databases."
"Agent service is a good feature of SQL Server, where you can schedule certain tasks."
"Great product."
"The security and vulnerability management are well-managed through the vendor."
"Security is obviously the most valuable feature because I can provide certain logins for a particular level of security and I can provide specific permissions for certain logins."
"The product is easy to use."
"After reviewing a client's Microsoft SQL environment, I have been able to set up specific alerts and jobs in SQL Server Management Studio (SSMS) to definitely show them where they are experiencing network latency, disk latency, memory pressure, etc., and I have done this type of performance review for over 20 clients in the last 5 years."
"SQL Server is a highly stable solution."
 

Cons

"The pricing is a bit expensive."
"The solution really doesn't add new features very often."
"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 technical support services need substantial improvement."
"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."
"I would like to see backups from secondary servers."
"This product could be made easier to use for beginners."
"This solution is in need of more current tools."
"The licensing costs are very high."
"I would like to see native plugins built for other platforms versus having to buy third-party plugins to tap into S3 buckets and AWS Cloud. Right now, it does not have those built-in plugins."
"It will be very useful to have high-level database monitoring. It should also have built-in business intelligence reporting."
"In the next release, I would like to see a better user interface and a familiar syntax."
"The Management Studio is a pretty heavy piece of software, and it's sometimes slow. I would recommend making an express version of the Management Studio, which is lighter and has fewer features but is a little faster."
"SQL Server has good performance, but it could be better."
"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."
"While using it, we really didn't experience any pain points."
 

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."
"I am not aware of the licensing costs or terms."
"The product has reasonable pricing. We purchase its yearly license."
"For me, it's always too expensive."
"Some of our clients purchase the license and others do not, they use Express SQL Server."
"For our purpose, we are not required to have a license for what we are using it for."
"There is an annual license and it is priced reasonably."
"We are on an annual enterprise license for the solution and the cost of the license could be reduced."
"Since we are a cloud-based company, there is AWS pricing on top of the SQL Server pricing. The Enterprise Edition can typically sell from around $1000 dollars a month, which is not cheap. Then, there is an additional one-time Windows cost, based on the code, which can go anywhere from $30,000 to $40,000 for the license."
"For smaller companies, they find this solution expensive."
"Synapse is a bit costly. If I compare it with different databases, I think it's a reasonable price"
"The price of SQL Server could be better in the African market. The licensing model needs to be improved, it is confusing."
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Top Industries

By visitors reading reviews
Construction Company
8%
Comms Service Provider
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 Enterprise117
 

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.
886,510 professionals have used our research since 2012.