IBM Db2 Database vs IBM Informix comparison

Why PeerSpot?

IBM Db2 Database and IBM Informix are both solutions in the Relational Databases Tools category. IBM Db2 Database is ranked #6 with an average rating of 7.6, while IBM Informix is ranked #28 with an average rating of 4.0. IBM Db2 Database holds a 6.5% mindshare in SQL, compared to IBM Informix’s 1.9% mindshare. Additionally, 90% of IBM Db2 Database users are willing to recommend the solution, compared to 85% of IBM Informix users who would recommend it.

IBM Db2 Database

Read 74 IBM Db2 Database reviews

10,016 Views
9,816 Comparison Views

90% willing to recommend

IBM Informix

Read 17 IBM Informix reviews

3,136 Views
2,822 Comparison Views

85% willing to recommend

IBM Db2 Database

IBM Informix

Comparison Buyer's Guide

Download the report

Executive SummaryUpdated on Mar 4, 2025

IBM Db2 and Informix compete in the database management systems category. Db2 appears to have the upper hand due to its comprehensive platform support and strong integration capabilities.

Features: Db2 offers extensive platform support, powerful SQL dialects, and self-tuning memory management that enhances performance and usability. It integrates well with various IBM tools and features robust security options. Informix is known for flexible data management, ease of use, and strong capabilities in hybrid data and replication, efficiently supporting large-scale data with minimal resources.

Room for Improvement: Db2 has a steep learning curve and a complex licensing process, with a need for a more user-friendly interface. Informix needs a stronger marketing presence and improved integration with modern tools, as well as advanced features like data anonymization. Both require enhanced support structures and more intuitive setup processes.

Ease of Deployment and Customer Service: Db2 mainly focuses on-premises deployment with hybrid cloud options, but users find its setup and interface challenging. Informix offers similar deployment flexibility with fewer reported issues. Db2 enjoys broad customer service access but experiences vary in support quality. Informix's support is adequate but requires better global reach and proactive engagement.

Pricing and ROI: Db2 is considered expensive but more cost-effective than Oracle in terms of long-term ROI due to its strong performance and security. Informix, while perceived as high-priced, is competitive within the industry, offering various editions for different enterprise scales. Both solutions need careful license management to maximize ROI and control costs.

To learn more, read our detailed IBM Db2 Database vs. IBM Informix Report (Updated: November 2026).

Buyer's Guide

IBM Db2 Database vs. IBM Informix

November 2026

Download the complete report

Helped 920,769 peers since 2012

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

6.6

Number of Reviews

Ranking in other categories

No ranking in other categories

IBM Informix

Ranking in Relational Databases Tools

28th

Average Rating

8.2

Reviews Sentiment

7.5

Number of Reviews

Ranking in other categories

Embedded Database (9th)

Mindshare comparison

As of November 2026, in the Relational Databases Tools category, the mindshare of IBM Db2 Database is 6.5%, down from 7.1% compared to the previous year. The mindshare of IBM Informix is 1.9%, up from 1.8% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Relational Databases Tools Mindshare Distribution
Product	Mindshare (%)
IBM Db2 Database	6.5%
IBM Informix	1.9%
Other	91.6%

Relational Databases Tools

Featured Reviews

Sathyan K

Founder, Director at perfTech Solutions Pvt Ltd

Database has secured high-volume transactions and supports fast, compliant workflow processing

Sterling B2B Integrator is a highly transactional-oriented application, which can be described as an OLTP application. Any data that flows through the application is stored in the database for each step that it performs. IBM Db2 Database helps the application work much faster from an OLTP perspective. IBM Db2 Database is SSL enabled, which means that from the security point of view, any access to the database is through SSL. Additionally, all compliance-related aspects have been taken care of from the database point of view, including database encryption and security-related features. It is highly scalable, and its performance related to database pruning is very good. It can be scaled vertically or horizontally so that data insertions and data access are much faster and more secure compared to how Oracle or other databases work.

Read full review

Nasir Niamat

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.

Read full review

Quotes from Members

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

Pros

"Db2 is a very old product, but also a very stable product."

"IBM’s DB2 is a robust relational database management system (RDBMS)."

"If you want horizontal scaling and reliability, DB2 for i is absolutely the way to go."

"When you submit a ticket the response time is quick."

"The newly added feature of ALSM is one of the top features"

"The solution has very good data compression of up to 50%. For example, if you have 50 terabytes of data, it can be reduced to 25 terabytes."

"It is quite a stable solution."

"I would say that IBM DB2 is one of the topmost Database products."

More IBM Db2 Database pros

"Informix can support huge quantities of data with less memory and less capacity."

"For IoT business cases, having Informix Enterprise Edition work on edge computers, like Raspberry Pi and using Informix replication, makes complex situations simple to build and maintain."

"Not looking at Informix would really mean a shot in your own leg before walking a long distance."

"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 scalability is very good."

"Replication is a valuable feature and easy to use."

"This solution has made financial reporting possible by allowing financial people the opportunity to set Informix to "Auto Pilot" so that they can attend other duties."

"OLTP processing capacity and the availability of information with high availability implementation have been significantly improved."

More IBM Informix pros

Cons

"The solution could improve the centralization aspect of the tools. It would be ideal if the solution offered backup functionality."

"End-to-end encryption specifically is something the solution needs to have in the next release."

"There could be better integration with some cloud solutions."

"Integration with other services could use some improvement. Currently, we are using Informatica ETL (Extract, Transform and Load) and the data is not loading as expected between the Db2 database and Informatica."

"Its process of building up queries could be more accessible."

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

"I would like to see better support for advanced analytics."

"We need some time to improve the performance. We have to perform a weekly REORG, or else RUNSTATS for the databases."

More IBM Db2 Database cons

"The support team could include local engineers to establish efficient communication. It will help us speed up the escalation process."

"Informix is very sturdy, but the problem for us is the marketing action around Informix."

"In my opinion, the packages could be improved. The version I use doesn't allow for packages. I can do some general procedures, but no packages like in Oracle. So, develop separate modules in SQL language. This would be most beneficial for me."

"It would be helpful to have IBM salespeople know that Informix exists, and sell it. Currently, it is completely ignored by IBM."

"The solution doesn't include functionality like data anonymization."

"I experienced poor input/output (IO) performance."

"Continue extending the SQL language for compatibility with the competition's language, including Stored Procedure Language."

"The solution should offer replication. It would be helpful if the solution would allow us to access third-party tools."

More IBM Informix cons

Pricing and Cost Advice

"If I consider the price of IBM Db2 Database, I would say there are cheaper products in the market."

"They are competitive and honest (compared to how peer firms approach licensing conversations). "

"Compared to other databases, Db2 is relatively cheaper."

"Among Microsoft SQL Server, Oracle, and Db2, Microsoft SQL Server is the cheapest one, and Oracle is the most expensive one. Db2 is in the middle. As compared to SQL Server, its price could go down. It will be good for customers."

"There is a license for this solution and we pay every three years."

"It is expensive."

"The total cost of the solution depends upon the PVU licensing"

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

More IBM Db2 Database pricing and cost advice

"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."

"I am not aware of the licensing costs or terms."

"For me, it's always too expensive."

See which vendors are best for you

Use our free recommendation engine to learn which Relational Databases Tools solutions are best for your needs.

See recommendations

920,769 professionals have used our research since 2012.

Top Industries

By visitors reading reviews

Financial Services Firm

18%

Manufacturing Company

Government

Outsourcing Company

Comms Service Provider

12%

Construction Company

10%

Outsourcing Company

Financial Services Firm

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	21
Midsize Enterprise	13
Large Enterprise	48

By reviewers
Company Size	Count
Small Business	9
Midsize Enterprise	2
Large Enterprise	8

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.

See all answers

What needs improvement with IBM Db2 Database?

A potential area of improvement is better documentation. From an educational perspective, it is difficult for people to understand IBM Db2 Database much faster compared to databases such as Oracle ...

See all answers

What is your primary use case for IBM Db2 Database?

We use IBM Db2 Database for B2B Integrator, specifically Sterling B2B Integrator, which requires a database to store all configuration details. Any workflow that is created, any configuration messa...

See all answers

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 ...

See all answers

What needs improvement with IBM Informix?

See all answers

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 ...

See all answers

Comparisons

SQL Server vs IBM Db2 Database

Compared 45% of the time

Oracle Database vs IBM Db2 Database

Compared 9% of the time

MySQL vs IBM Db2 Database

Compared 5% of the time

Teradata vs IBM Db2 Database

Compared 5% of the time

Oracle Database In-Memory vs IBM Db2 Database

Compared 2% of the time

More IBM Db2 Database Competitors

Oracle Database vs IBM Informix

Compared 15% of the time

SQL Server vs IBM Informix

Compared 15% of the time

MySQL vs IBM Informix

Compared 6% of the time

Actian Ingres vs IBM Informix

Compared 6% of the time

SAP HANA vs IBM Informix

Compared 6% of the time

More IBM Informix Competitors

Product Reports

Buyer's Guide

IBM Db2 Database

October 2026

Download IBM Db2 Database product report

Buyer's Guide

IBM Informix

October 2026

Download IBM Informix product report

Also Known As

DB2

Informix

Overview

IBM Db2 Database provides a robust SQL dialect, multi-platform support, self-tuning memory, and strong security. Its capabilities in handling structured and unstructured data while offering high uptime make it reliable for diverse applications.

IBM Db2 Database is known for its robust performance, seamless integration, and effective data replication. It supports diverse environments and applications, leveraging its advanced features like automatic storage, data compression, and efficient resource management. Despite its strengths, complexities in learning, costly licensing, and a need for better interfaces and advanced analytics support are noted. It requires improvements in AI features, management simplification, and cloud compatibility to effectively address the dynamic needs of businesses.

What are the important features of IBM Db2 Database?

Powerful SQL Dialect: Offers extensive SQL capabilities for varied database tasks.
Multi-platform Support: Compatible with different operating systems for flexible deployment.
Self-tuning Memory: Automatically optimizes memory usage for improved performance.
High Availability: Ensures continuous service with minimal downtime.
Strong Security: Provides advanced security measures for data protection.

What benefits should users consider when evaluating IBM Db2 Database?

Ease of Use: Simplifies database management and operation.
Autonomic Features: Automatically performs optimization and recovery tasks.
Robust Performance: Maintains high efficiency in data processing and management.
Seamless Integration: Easily integrates with existing systems and applications.
Effective Data Replication: Ensures data consistency and reliability across platforms.

Organizations leverage IBM Db2 Database in financial and banking applications, including core banking systems, card management, and transaction management. It also serves as a data warehouse supporting ERP systems, e-commerce projects, and data integration. Its robustness is utilized in mainframe environments across sectors like entertainment, retail, and public cloud deployments.

IBM

IBM Informix is renowned for its high performance and reliability, especially optimized for OLTP settings. Supporting large data volumes with scalability and advanced data management features, Informix efficiently integrates SQL and NoSQL capabilities within hybrid environments.

IBM Informix provides comprehensive capabilities tailored for robust database management and industry applications. Designed for handling concurrent data processing, its advanced replication, data compression, and seamless scalability are key highlights. Despite facing challenges such as less replication enhancement and SQL compatibility, Informix remains crucial for sectors like healthcare, banking, and government, integrating effectively with Unix-based systems. While some users seek improved AI features, enhanced tools, and simpler administration, Informix stands as a reliable choice for demanding data tasks.

What are the main features of IBM Informix?

Advanced Data Replication: Facilitates efficient data management across different environments.
Scalability: Offers both horizontal and vertical scaling for handling growth and complexity.
Data Compression: Reduces storage needs, saving resources while enhancing performance.
Hybrid Data Capabilities: Allows integration of SQL and NoSQL for varied data needs.

What benefits should users expect from IBM Informix?

High Performance: Optimized for OLTP, ensuring quick data transactions and processing.
Reliability: Stable performance even under demanding conditions, maintaining data integrity.
Cost Efficiency: Handles large data volumes with minimal resources, reducing overall costs.
Ease of Management: Simplifies complex database scenarios, enhancing operational efficiency.

IBM Informix plays a central role in sectors such as healthcare, banking, telecommunications, and government by supporting crucial operations through data processing, replication, and backup tasks. Its ability to integrate into Unix-based systems makes it widely adopted for applications, analytics, and real-time industry needs, especially in organizations focusing on OLTP systems.

IBM

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

Shaspa, Hildebrand, Kaifa, Ranhill Powertron, Federaci‹ Farmacutica (FedeFarma), Camden Council, The German Aerospace Center (DLR), Myers, Votorantim Group, Doosan Infracore, GreenIvory

Buyer's Guide

IBM Db2 Database vs. IBM Informix

November 2026

Free Report: IBM Db2 Database vs. IBM Informix

Find out what your peers are saying about IBM Db2 Database vs. IBM Informix and other solutions. Updated: November 2026.

DOWNLOAD NOW

920,769 professionals have used our research since 2012.

See our IBM Db2 Database vs. IBM Informix report.

See our list of best Relational Databases Tools vendors.

We monitor all Relational Databases Tools reviews to prevent fraudulent reviews and keep review quality high. We do not post reviews by company employees or direct competitors. We validate each review for authenticity via cross-reference with LinkedIn, and personal follow-up with the reviewer when necessary.