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
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

"My advice is to take it; you will never regret it."
"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."
"Every version is faster than the previous."
"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."
"Overall, this is a great product. It works really well, is very stable, and is very scalable."
"The solution's stability, performance, enhanced functionality, and replication are all great features."
"Not looking at Informix would really mean a shot in your own leg before walking a long distance."
"The solution is very intuitive and easy to use."
"SQL Server, as a database, is great, and when it comes to the governmental sector, it is easily dealt with and can handle a big load of data, especially after they added the capability of building a big data cluster from the SQL Server itself."
"The stability is fine, especially if you're hosting it on AWS or Azure. You can get up to 99.99% stability on AWS."
"Overall, it is generally a good product, and if you're interested in using this solution, my advice is to do your research because it's a good product, but there are other products available."
"There is improvement in the performances and stability."
"From my point of view, using SQL Server 2017 and 2019 is very good."
"The solution is easy to use."
"Technical support is very good."
 

Cons

"The solution should offer replication. It would be helpful if the solution would allow us to access third-party tools."
"This solution is in need of more current tools."
"The solution really doesn't add new features very often. Other solutions are much more actively pushing out upgrades and improvements."
"I really would love to have a QT plugin."
"This solution is in need of more current tools."
"I really would love to have a QT plugin."
"I would like to see backups from secondary servers."
"I would like to see backups from secondary servers."
"On the SQL Server Management Studio (SSMS) side, I have noticed more bugs in terms of being able to connect to our SQL servers. I can't tell how many times my recent server list got dropped or cleaned out. It is a pain, and it would be nice to have that recent connect list when you connect in. For whatever reason, once in a while, I get a hard error, and it'll close. When I go back in, everything is cleared out. It is annoying when you are working with more than a hundred database instances."
"Every good tool has its own limitations. First of all its cost. It is very high."
"The scalability is adequate but could improve."
"We do not have much to complain about SS 2016 Dev Ed in itself, we do have some complaints regarding licensing for SQL Server 2016 Enterprise Ed."
"The stability of the solution should be improved in the next release. Sometimes it is great, sometimes it is troublesome."
"Its ability to handle certain kinds of large data could be improved."
"SQL Server has a tendency to consume all the memory you allow it to. If you are not careful, you can basically break your server."
"Its support for JSON should be improved. It does support JSON, but the support is not good enough currently. They should also improve the way indexes work. Its performance can also be improved because sometimes it becomes very slow for certain table designs. It cannot have more than a certain amount of data. As compared to other databases, its capability to handle large volumes of data is not very good."
 

Pricing and Cost Advice

"For me, it's always too expensive."
"I am not aware of the licensing costs or terms."
"The product has reasonable pricing. We purchase its yearly license."
"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."
"There is a subscription that needs to be purchased to use the solution."
"You need to pay for the license. It most probably has per-core licensing."
"SQL Server is an expensive solution."
"The product’s price depends on the specific server requirements."
"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."
"It is expensive in terms of licensing costs and pricing. If you want to scale SQL Server, it is very expensive. We probably have to pay extra for technical support. We also have to pay for the license of Windows on which the SQL Server resides, which is an extra cost."
"Some of the licensing are very expensive, such as the Enterprise 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."
report
Use our free recommendation engine to learn which Relational Databases Tools solutions are best for your needs.
886,719 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
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.
886,719 professionals have used our research since 2012.