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IBM Db2 Database vs SQL Server comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Jul 27, 2025

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

ROI

Sentiment score
6.6
IBM Db2 Database offers high ROI with enhanced efficiency and performance, despite initial costs, supporting seamless business projects.
Sentiment score
7.3
SQL Server offers high ROI through cost-effectiveness, automation, and ease of deployment, with returns often within a year.
All applications need our repository to provide services for our online business or our customers, so the return is good.
 

Customer Service

Sentiment score
6.5
IBM Db2 support is generally reliable yet requires speed improvements; users find response times and expertise occasionally lacking.
Sentiment score
6.5
Microsoft support offers valuable online resources, but experiences vary with concerns about wait times and language issues.
We normally receive substantial discounts on the price.
When we created support tickets, the experience was very positive.
 

Scalability Issues

Sentiment score
7.1
IBM Db2 excels in scalability for large companies but faces challenges with horizontal scaling and increasing costs.
Sentiment score
7.0
SQL Server is generally scalable and effective, but large datasets and costs pose challenges requiring maintenance and infrastructure adjustments.
The server where we installed it has grown from 64 gigabytes in RAM to 256 gigabytes, demonstrating significant scalability capabilities.
 

Stability Issues

Sentiment score
7.7
IBM Db2 Database is highly rated for stability and reliability, though performance can dip with significant data growth.
Sentiment score
7.6
SQL Server is highly stable and reliable, with most issues resolved by updates, receiving high satisfaction ratings.
 

Room For Improvement

IBM Db2 Database needs usability, integration, and cloud improvements, plus better licensing, analytics, security, and standardization tools.
SQL Server needs better pricing, integration, security, performance, and support, with improvements in Management Studio, encryption, and cloud services.
It might be slightly slower than other database vendors, but it works well since banks typically do not move quickly with leading-edge technology.
I would appreciate using Microsoft Pro as it can integrate with Excel or, with a simple query, consume information from the database using Microsoft Excel.
When we consider the price for replication in another site, the pricing becomes prohibitive.
 

Setup Cost

IBM Db2 pricing is complex and expensive, especially in Africa and the Middle East, but offers robust features.
SQL Server pricing is costly but cheaper than Oracle, with various licensing options and a free Developer Edition available.
 

Valuable Features

IBM Db2 Database offers SQL, Java integration, scalability, security, and seamless IBM integration for flexible, reliable enterprise applications.
SQL Server offers dynamic resource allocation, high availability, performance, security, integration, ease of use, scalability, and extensive support.
IBM Db2 Database, because of enterprise performance and support, is why banks still maintain their relationship with it.
The IBM Db2 Database is trusted, and IT effort is less than any other product.
I have been working with SQL Server for a long time, and it works well for me as I am using it in different applications, such as web applications, Windows applications, or the data warehouse reporting.
For disaster recovery features supporting mission-critical applications in our organization, we have implemented the high availability feature of SQL Server.
 

Categories and Ranking

IBM Db2 Database
Ranking in Relational Databases Tools
6th
Average Rating
8.2
Reviews Sentiment
6.7
Number of Reviews
75
Ranking in other categories
No ranking in other categories
SQL Server
Ranking in Relational Databases Tools
1st
Average Rating
8.4
Reviews Sentiment
6.8
Number of Reviews
270
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of September 2025, in the Relational Databases Tools category, the mindshare of IBM Db2 Database is 7.5%, up from 6.8% compared to the previous year. The mindshare of SQL Server is 15.8%, down from 22.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Relational Databases Tools Market Share Distribution
ProductMarket Share (%)
SQL Server15.8%
IBM Db2 Database7.5%
Other76.7%
Relational Databases Tools
 

Featured Reviews

Michael Raz - PeerSpot reviewer
Efficient access path optimization and performance excellence with helpful support
IBM Db2 for zOS serves as the central database for all the core business applications in the two banks I work with. All applications use Db2 as a data server. We fully implement and utilize most of Db2's functionalities and capabilities for core banking business applications IBM Db2 has…
Gus Mtz - PeerSpot reviewer
Availability and financial reporting thrive with robust integration tools
The best features of SQL Server are availability and stability. We never have concerns about the database. The ability of SQL Server to integrate with other Microsoft services, such as Azure for supporting business intelligence or data analytics, is primarily through Power BI for analytics tools. We use Power BI, but not in the cloud. We have interfaces with other databases. We extensively use the ETL tools of SQL Server for integrating with other databases or text files. The ETL tools are excellent for making jobs that run daily or hourly. For disaster recovery features supporting mission-critical applications in our organization, we have implemented the high availability feature of SQL Server. The always-on feature provides high availability in SQL Server. We use this tool daily for our risk management application.
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Top Industries

By visitors reading reviews
Financial Services Firm
20%
Manufacturing Company
10%
Government
9%
Computer Software Company
9%
Financial Services Firm
15%
Computer Software Company
12%
Manufacturing Company
9%
Government
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business20
Midsize Enterprise13
Large Enterprise48
By reviewers
Company SizeCount
Small Business121
Midsize Enterprise58
Large Enterprise112
 

Questions from the Community

What do you like most about IBM Db2 Database?
Db2 database scalability and performance capabilities match our database needs. It covers pretty much everything a database administrator or engineer might need.
What is your experience regarding pricing and costs for IBM Db2 Database?
IBM Db2 is an expensive solution. While I am not heavily involved with pricing, additional companies provide capabilities or products like those from BMC, which many installations might also purchase.
What needs improvement with IBM Db2 Database?
The IBM Db2 Database is a good solution, but now there is a high maintenance charge. The IBM Db2 Database needs improved support, and there are many difficulties in using it. We tend to use the clo...
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

DB2
Microsoft SQL Server, MSSQL, MS SQL
 

Overview

 

Sample Customers

Knorr-Bremse, Mizuho Bank Ltd., Australian Government Department of Defence, SCHWENK Zement, Friedhelm Loh Group, YAZAKI Europe Limited, Ekornes ASA, Baldor Electric, VSN Systemen BV, Lion Brewery (Ceylon) PLC, PLANSEE Group, TE Connectivity, Hansgrohe SE, Openmatics, University of Toronto
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 Db2 Database vs. SQL Server and other solutions. Updated: September 2025.
867,349 professionals have used our research since 2012.