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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

"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."
"It supports in-house-built applications in .NET and VB6"
"Replication is a valuable feature and easy to use."
"The scalability is very good."
"It is very easy to install IBM Informix, very easy to scale, and support is quite better."
"Replication, all levels of replication, query charting, and the MongoDB embedded are the most valuable features of this solution."
"OLTP processing capacity and the availability of information with high availability implementation have been significantly improved."
"The solution's stability, performance, enhanced functionality, and replication are all great features."
"SQL Server is essentially the backbone of every microservice. From a developer's perspective, it is the backbone of all microservices. The tool enables data retrieval, set data, and essential operations, ensuring the smooth functioning of applications. In essence, it is the integral part that keeps applications operational."
"We have found the solution valuable because we are able to easily create a query, shrink, backup, and make new tables."
"I have complete warehouse logic inside stored procedure and it works like a charm."
"Agent service is a good feature of SQL Server, where you can schedule certain tasks."
"We use the solution both on the cloud and on-premises and we have been pleased with its capabilities overall."
"The initial setup was straightforward."
"SQL Server is a highly stable solution."
"The solution is easy to use, has rich feature sets, and is business-oriented."
 

Cons

"I would like to see backups from secondary servers."
"The solution doesn't include functionality like data anonymization."
"The product needs a lot more marketing involvement from IBM."
"I would like to see backups from secondary servers."
"Every month or every second month, we find some bugs in it, which is not ideal."
"The solution should offer replication. It would be helpful if the solution would allow us to access third-party tools."
"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 pricing is a bit expensive."
"Query optimitzer could be simplified."
"Overall, trying to make over with Oracle, it can be improved in usage for high data migration companies of large scale."
"Additional interfaces would be an improvement."
"They need to improve their support. It should be faster."
"If SQL Server could perhaps run on Linux, that would be good. Most of us prefer Linux and I've used a lot of Linux. I understand that SQL Server is quite powerful, but I'm not sure if the functionality is there, but if it could be used in an open-source type of environment, it would be very good."
"I would like to have more replication scenarios."
"It is very costly, and that's the reason people are moving away from SQL Server."
"I would like to see the database become fully automated."
 

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 price of the solution could be cheaper."
"On a scale from one to ten, where one is cheap and ten is expensive, I rate the solution's pricing a seven out of ten."
"The price for the Standard Edition is approximately $3,000 USD per core. Once you include technical support, SQL Server is cheaper than PostgreSQL and MySQL."
"This is a very cheap product."
"For a brief period, approximately one year before 2018, I had experience working with the open-source version of SQL Server. During that time, I found SQL Server to be the preferred choice, in my opinion."
"The price of SQL Server could be reduced, the license is expensive. We have an annual subscription."
"For medium-sized customers who don't need some enterprise features, the tool would be available for 200 USD per month. For the enterprise segment, the tool's cost can go up to 6,000 USD."
"To scale the solution there are additional costs."
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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.
892,678 professionals have used our research since 2012.