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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
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

"The solution's stability, performance, enhanced functionality, and replication are all great features."
"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."
"The initial setup is very simple."
"It supports multiple applications and business intelligence tools."
"It is very easy to install IBM Informix, very easy to scale, and support is quite better."
"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."
"Overall, this is a great product. It works really well, is very stable, and is very scalable."
"We don't have any problems with the Informix Database."
"The solution has proven to be very stable."
"The most valuable features of SQL Server are the speed, great support, and it is from a known vendor."
"What I like best about this product is the environment."
"SQL Server's performance is fine."
"I think just having everything in one centralized set of databases where there is easily managed manageable."
"The solution's most valuable feature is that we can set up redundant databases and replication in the databases."
"It's much more friendly in comparison with Oracle."
"SQL Server scales well."
 

Cons

"The support team could include local engineers to establish efficient communication. It will help us speed up the escalation process."
"I would like to see backups from secondary servers."
"There should be more intelligence surrounding discovering data to be able to automatically create indexes."
"I would like to see backups from secondary servers."
"The pricing is a bit expensive."
"This product could be made easier to use for beginners."
"The solution really doesn't add new features very often. Other solutions are much more actively pushing out upgrades and improvements."
"This solution is in need of more current tools."
"The scalability and the high availability feature can be expanded or improved; currently, there is a limitation on scalability."
"There is always some place for improvements. Statistics could be better (2 table statistic), or dynamic partition function, but that is probably true with every other product."
"Reloading all the data in a database can cause potential data loss especially when the size of database is large."
"SQL Server could improve by increase the performance, it cannot handle large amounts of data. I did not find any additional features compared to others solutions."
"The solution could be better integrated with the SQL Server Studio tool."
"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."
"I would like to have the option to use fewer processors for certain tasks, thus reducing the licensing fee."
"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."
 

Pricing and Cost Advice

"For me, it's always too expensive."
"The product has reasonable pricing. We purchase its yearly license."
"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."
"There is a license required for this solution."
"SQL Server has the best licensing price."
"The solution is on a pay-per-use pricing model."
"We are on an annual enterprise license for the solution and the cost of the license could be reduced."
"The price of SQL Server could be better in the African market. The licensing model needs to be improved, it is confusing."
"SQL Server's pricing has proven satisfactory for our market range."
"It's cheaper than Oracle."
"There is a license required for this solution and we pay monthly. The price is reasonable compared to other solutions."
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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.
892,776 professionals have used our research since 2012.