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IBM Integration Bus vs Mule ESB vs WSO2 Enterprise Integrator comparison

 

Comparison Buyer's Guide

Executive Summary

Review summaries and opinions

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

Mindshare comparison

As of May 2026, in the Enterprise Service Bus (ESB) category, the mindshare of IBM Integration Bus is 15.4%, down from 22.0% compared to the previous year. The mindshare of Mule ESB is 16.6%, down from 20.4% compared to the previous year. The mindshare of WSO2 Enterprise Integrator is 6.1%, up from 5.2% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Enterprise Service Bus (ESB) Mindshare Distribution
ProductMindshare (%)
Mule ESB16.6%
IBM Integration Bus15.4%
WSO2 Enterprise Integrator6.1%
Other61.9%
Enterprise Service Bus (ESB)
 

Featured Reviews

RA
Associate Consultant at MindCraft Software Pvt. Ltd.
Efficient data transformation and seamless integration drive successful deployments
As for improvements in IBM Integration Bus, we are getting another feature of the retry mechanism now. Version 8.13 was upgraded, and we started using the retry mechanism itself, and we are using nodes in the development level. They are improving one of the nodes such as the HTTP request node, implementing the indirect retry mechanism itself, and we are getting new features.
Srinivas-Kanduri - PeerSpot reviewer
Enterprise integrator at a tech vendor with 10,001+ employees
Integration architecture has enabled reliable multi-channel messaging and secure API management but now needs better analytics and simpler development
In my opinion, the real-time analytics part of Mule ESB is not up to the mark for the decision-making process. While there are some analytics features, they lack the standards needed for enterprise use. Compared to other analytics tools such as Power BI, MuleSoft falls short.Points for improvement in Mule ESB definitely include enhancing the analytics capabilities because currently, they rely on external logging tools such as Splunk or ELK, which is lagging behind compared to other tools such as Workato that offer more analytical features. Additionally, issues arise with AI-based use cases due to dependencies on Salesforce tools such as agent force, making development more complicated when it should be more independent. Developing AI-based agents without being tied to Salesforce applications could also enhance functionality.
AC
Technical director at Cremete
Effective data transformation and integration in complex environments with high functionality
Something that could be improved in WSO2 Enterprise Integrator is that the problem is not a lack of capability or functionalities. The problem is that it is a very complex environment. To put your hand on this environment is a very demanding task. This is the real problem. The problem is not about the product, but about the complexity to manage, to configure, to decide what to do. I have some experience using SAP R/3. It seems to me something similar. When you have to configure a situation with a client, especially for a client not in an industrial sector, but in a service sector, it is quite usual that you are in trouble for some reason. This is always the story that I found in the implementations I have done. Maybe there are only three or four big problems, in some other cases there are more than that, but this is the situation usually. For WSO2 Enterprise Integrator, not the same, but I must say it is quite often there is a need to put together some pieces and make it work in a coordinated way.

Quotes from Members

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

Pros

"REST API design and development support are useful. Building and exposing APIs using GUI API designer with editor makes implementation a breeze."
"IBM ACE is very well engineered and very stable."
"IBM Integration Bus's best feature is integration."
"We have benefited by using this solution from the IAB, we have been able to use different delivery types."
"One of the most valuable features is how seamless and easy to use this solution is. This is a fantastic solution and a very measured product."
"I have found the inbound and outbound adapter confirmations valuable."
"The most valuable features of the IBM Integration Bus are flexibility. It's also an alternative for integrating it with other projects, which we are not ready at this time to do, such as switching to tunnels. The tunnels would be used with other partners to make sure everything is secured."
"We've been using IBM Integration Bus for seven years to create a service-oriented architecture in our bank and implement SOAR infrastructure using this tool. It helps us with internal services for core banking and different digital channels. We also use it to expose our services to other banks and companies and consume services from outside our bank using proxy servers."
"I like that it's user-friendly. Compared to other ESBs, I find it easier to use. I like it better than other ESBs. I like the connectors, which make calling the APIs through the routers easier."
"Mule ESB is one of the best; it is easy to use and setup."
"The scalability is amazing, and you can increase the horizontal perspective or increase the vertical perspective depending on your business needs."
"Mule ESB platform provided is very cohesive, and that's why it's leading in the Gartner quadrant as well and it's one of the best integration products as of now, especially when it comes to APIs, which has helped integration projects, particularly in terms of control and efficiency."
"I like that Mule ESB provides fast and good technical support."
"With Mule as its core runtime engine, Anypoint Platform is built with open technologies to promote reusability, modularity and collaboration, increasing developer productivity and project speed."
"Mule ESB is quite lightweight."
"The solution has a good graphical interface."
"The solution basically conforms to our standards."
"The connectors have been the most impactful features for handling integrations. I can use these connectors when I need specific connectivity with a third party, like a core banking system in BFSI. I don't need to do all the development. I take the specific connector, put in the IP address and password, and it takes care of everything."
"It's a very complete product. It allows us to network security and add more layers of security to the system."
"The learning curve for this solution is very good."
"The installation process is easy."
"The stability is excellent."
"WSO2's analytics capability is good, considering the ELC support they provide."
"The customer service executives are very responsive."
 

Cons

"The solution requires a license and is very expensive here in India."
"The solution doesn't have a standard testing framework that can be used for integration performance and other tests."
"In terms of improvement, the UI should be more user-friendly."
"I would like to be able to build an Integration Bus cluster that is active-active."
"The version of the technology and current knowledge is a bit outdated."
"The solution is too expensive for smaller companies."
"Licensing is too high. It is quite expensive."
"The solution’s pricing could be improved."
"Mule ESB is a costly solution."
"The documentation is not extensive and is limited to examples which are too basic."
"The Mule IDE (Integrated Development Environment) could be more stable."
"The Anypoint platform consumes a lot of memory, and it would be great for developers if it were more lightweight."
"MuleSoft is not so strong in method-based integration, so they're not so functional in that regard."
"Lacking some connectors that could be included."
"MuleSoft isn't as mature as some other integration technologies out there like IBM WebSphere."
"There are limitations with the subscription model that comes with the product."
"The server is very specific and it is very difficult to get experience with it."
"The integration capabilities need to be improved."
"The product's price is an area of concern where improvements are required."
"If I have to buy software, then it becomes expensive for me."
"The micro integrator should be improved. There is room for enhancement considering alternative integration components."
"You cannot include the validation of XPath."
"They should release upgrades more frequently."
"There are a lot of security settings that when you apply you have to re-apply again every time you modify a setting."
 

Pricing and Cost Advice

"The pricing of the solution is high."
"Support costs are high compared to the competition. Otherwise, the support is good."
"IBM Integration Bus solution is expensive and this is one of the reasons we are looking for an alternative, such as MuleSoft."
"It is a highly-priced solution."
"The price of this product could be lower."
"I generally do not get involved in the licensing or pricing because I'm a hardcore technical guy, but I'm aware of the fact that IBM is highly expensive, so not everybody can afford it. All the products are licensed."
"Our licensing is based on a five-year contract, and as far as I know, there are no costs in addition to the standard licensing fee."
"The price of the IBM Integration Bus is expensive. If you compare the price to the cloud version you can purchase what you need but the on-premise version price is flat."
"This product is expensive, but it does offer value for money."
"Regarding licensing and pricing, I find it somewhat flexible. They are more flexible with larger customers compared to small and medium ones, as their licensing model depends on ports and other factors. Large customers benefit from more flexibility in implementation and renewal compared to smaller ones."
"This is expensive. In my next project, we had to go to other vendor."
"Mule ESB is an expensive solution."
"The solution is expensive."
"You will not get any support from Mule ESB's team for the tool's community edition...You can get support with the licensed version of Mule ESB."
"This product is cheaper than some offered by other vendors, although there is a problem because you have to pay for some third-party adapters."
"The price of the Mule ESB commercial version is expensive. However, they have a free community version."
"It is a low-cost solution."
"The solution costs about 20,000 or 30,000 euros per year, per instance."
"The open-source, unsupported version is available free of charge."
"The pricing of WSO2 Enterprise Integrator for enterprise subscriptions can be considered expensive, especially from the perspective of someone who prefers open-source software."
"The cost is better than IBM Cloud Pak."
"I rate the product price a six on a scale of one to ten, where one is low price and ten is high price."
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Top Industries

By visitors reading reviews
Financial Services Firm
18%
Manufacturing Company
8%
Computer Software Company
6%
Comms Service Provider
6%
Financial Services Firm
13%
Manufacturing Company
11%
Computer Software Company
9%
Comms Service Provider
8%
Financial Services Firm
13%
Comms Service Provider
8%
Manufacturing Company
7%
Government
5%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business15
Midsize Enterprise17
Large Enterprise47
By reviewers
Company SizeCount
Small Business23
Midsize Enterprise6
Large Enterprise39
By reviewers
Company SizeCount
Small Business8
Midsize Enterprise2
Large Enterprise11
 

Questions from the Community

Migration from IBM Integration Bus to Mulesoft ESB for a large enterprise tech services company
I was previously part of the Oracle SOA/OSB development team. In my current capacity I architected solutions using Mu...
IBM Integration Bus vs Mule ESB - which to choose?
Our team ran a comparison of IBM’s Integration Bus vs. Mule ESB in order to determine what sort of ESB software was t...
What is your experience regarding pricing and costs for IBM Integration Bus?
Regarding the pricing setup cost and licensing for IBM Integration Bus, I believe it is expensive. The IBM tool is no...
What is your experience regarding pricing and costs for Mule ESB?
In terms of costing, I consider it 50-50; I would not say it's 100% cost-effective because the platform itself is a l...
What needs improvement with Mule ESB?
In my opinion, the real-time analytics part of Mule ESB is not up to the mark for the decision-making process. While ...
What is your primary use case for Mule ESB?
Mule ESB is an enterprise service bus where all applications are integrated, making them loosely coupled systems with...
What needs improvement with WSO2 Enterprise Integrator?
Something that could be improved in WSO2 Enterprise Integrator is that the problem is not a lack of capability or fun...
What is your primary use case for WSO2 Enterprise Integrator?
A typical use case for WSO2 Enterprise Integrator is when I am in an interoperability environment with healthcare fac...
What advice do you have for others considering WSO2 Enterprise Integrator?
For simpler tasks or simpler use cases, we avoid using WSO2 Enterprise Integrator because it is quite complex. So it ...
 

Also Known As

IBM WebSphere ESB
No data available
No data available
 

Overview

 

Sample Customers

Salesbox, €sterreichische Bundesbahnen (€BB), Road Buddy, Swiss Federal Railways, Electricity Supply Board, The Hartree Centre, ESB Networks
Ube, PacificComp, University of Witwatersrand, Justice Systems, Camelot
West
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