IBM Db2 Database vs kdb+ comparison

IBM and Kx Systems are both solutions in the Relational Databases Tools category. IBM is ranked #6 with an average rating of 8.2, while Kx Systems is ranked #33. IBM holds a 6.8% mindshare in SQL, compared to Kx Systems’s 0.9% mindshare. Additionally, 90% of IBM users are willing to recommend the solution, compared to 100% of Kx Systems users who would recommend it.

IBM Db2 Database

Read 75 IBM Db2 Database reviews

4,208 Views
4,082 Comparison Views

90% willing to recommend

kdb+

Read 1 kdb+ review

505 Views
455 Comparison Views

100% willing to recommend

IBM Db2 Database

kdb+

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Executive Summary

We performed a comparison between IBM Db2 Database and kdb+ based on real PeerSpot user reviews.

Find out what your peers are saying about Microsoft, Oracle, SAP and others in Relational Databases Tools.

To learn more, read our detailed Relational Databases Tools Report (Updated: March 2026).

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Relational Databases Tools

March 2026

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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 Db2 Database

Ranking in Relational Databases Tools

6th

Average Rating

8.2

Reviews Sentiment

6.7

Number of Reviews

Ranking in other categories

No ranking in other categories

kdb+

Ranking in Relational Databases Tools

33rd

Average Rating

9.0

Number of Reviews

Ranking in other categories

No ranking in other categories

Mindshare comparison

As of March 2026, in the Relational Databases Tools category, the mindshare of IBM Db2 Database is 6.8%, up from 6.8% compared to the previous year. The mindshare of kdb+ is 0.9%, up from 0.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Relational Databases Tools Mindshare Distribution
Product	Mindshare (%)
IBM Db2 Database	6.8%
kdb+	0.9%
Other	92.3%

Relational Databases Tools

Featured Reviews

reviewer2708292

Associate Director, Data Architecture at a financial services firm with 10,001+ employees

Support improves setup and maintenance while pricing influences decision

If you have a similar use case and the same deal with IBM as our company, it is definitely a good option and choice. The company I work with has more than 50,000 people and more than 500 support staff. We are not locked into one database vendor. We typically work with multiple database vendors simultaneously, selecting the top choice based on the deals we make and other considerations. We do not use IBM Db2 Database related to AI at this moment because our AI project PLC is still very small scale. We may consider it in the future if we have enough scale. Overall rating for IBM Db2 Database is 8.5 out of 10.

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Nitin Garg

Vice President - Financial Services at Evalueserve

An easy-to-deploy solution that can be used for data ingestion and usage

I work for a fintech company where we create several strategies generally built on finance data, which are like one-time series data. We deal with huge bulk data on a daily basis, and we use kdb+ for data ingestion and usage The most valuable feature of kdb+ is the speed at which it returns the…

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Quotes from Members

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

Pros

"Very good for performance and scalability."

"The structure is straightforward, consisting of the test file and the logical and physical files. You have one physical file and many logical files related to it."

"I have found the most valuable feature to be its availability."

"Its robustness, scalability, availability, and performance are valuable. All these are the major attributes of a relational database for supporting a very high-volume business, and Db2 is very good in all those areas and in all those attributes."

"The valuable features include access path optimization, excellent performance, a robust locking mechanism, parallelism, and effective buffering in memory."

"It is quite a stable solution."

"It is a scalable solution."

"I believe that because the support is good, they jump in and assist us in determining the root cause."

More IBM Db2 Database pros

"The solution returns data quickly, and data retrieval is fast in kdb+."

Cons

"The data table names are very short which is not user-friendly compared to the Oracle SQL server. It should have longer column and table names."

"They should develop its containerized version."

"The technical support can be faster."

"IBM Db2 Database is not ACID compliant, which would improve it. Db2 lacks Isolation, so when two people are trying to update the same field at the same time it can become stuck. Other newer databases do not have this issue, such as Microsoft SQL, Oracle DB, PostgreSQL, and SAP HANA."

"The user interface is old and needs to be improved."

"The vendor should offer a free version"

"I would like to see some artificial intelligence brought into the solution."

"They could enhance the product's cloud integration and general-purpose database capabilities."

More IBM Db2 Database cons

"The solution should have a more user-friendly user interface."

Pricing and Cost Advice

"It's very expensive for West African countries like ours."

"We normally handle large size businesses and as far as I am aware, the license is negotiable based on the number of users and the quantitative data."

"Licensing fees are on a yearly basis."

"The solution costs less than other products."

"Db2 is less expensive than Oracle."

"I rate the product pricing a nine out of ten."

"We purchase the product's yearly license."

"The solution's hardware and subscription model for support are very expensive."

More IBM Db2 Database pricing and cost advice

Information not available

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Top Industries

By visitors reading reviews

Financial Services Firm

17%

Manufacturing Company

10%

Government

Computer Software Company

Financial Services Firm

45%

Retailer

Comms Service Provider

Energy/Utilities Company

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	20
Midsize Enterprise	13
Large Enterprise	48

No data available

Questions from the Community

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.

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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...

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What is your primary use case for IBM Db2 Database?

I use the IBM Db2 Database for development applications. Many clients in our company have business applications currently working on it.

See all answers

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Comparisons

SQL Server vs IBM Db2 Database

Compared 39% of the time

Oracle Database vs IBM Db2 Database

Compared 15% of the time

Teradata vs IBM Db2 Database

Compared 7% of the time

SAP HANA vs IBM Db2 Database

Compared 7% of the time

MySQL vs IBM Db2 Database

Compared 5% of the time

More IBM Db2 Database Competitors

SQL Server vs kdb+

Compared 22% of the time

SingleStore vs kdb+

Compared 21% of the time

Oracle Database In-Memory vs kdb+

Compared 16% of the time

Oracle Database vs kdb+

Compared 15% of the time

MariaDB vs kdb+

Compared 14% of the time

More kdb+ Competitors

Product Reports

Buyer's Guide

IBM Db2 Database

March 2026

Download IBM Db2 Database product report

Buyer's Guide

Relational Databases Tools

March 2026

Download kdb+ product report

Also Known As

DB2

No data available

Overview

DB2 Enterprise for Linux, UNIX, and Windows is the ideal data server for the most demanding workloads. New XML support is designed to help firms minimize the time and effort it takes to persist and use their XML data reducing development costs and improving business agility.

IBM

Kx is the world leader in high-performance, in-memory computing, streaming analytics and operational intelligence. The company’s focus is on delivering the best possible performance and flexibility for high-volume, data-intensive analytics and applications. Kx software includes the time-series database kdb+ with a built-in programming language called q, and a robust suite of visualization tools built on top of the database platform providing business intelligence for all users.

Kx Systems

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

UniCredit, AIRBUS

Buyer's Guide

Relational Databases Tools

March 2026

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