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IIS vs Oracle WebLogic Server vs Tomcat 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:
 

ROI

Sentiment score
5.7
Network authentication improved, offering affordability and ROI, though user-friendly enhancements for IIS novices are needed.
Sentiment score
6.3
Oracle WebLogic Server offers significant long-term benefits with enterprise features, enhancing performance, compliance, and operational efficiency despite high costs.
Sentiment score
8.3
Tomcat ensures rapid ROI with minimal costs, offering scalability, simplified server management, and reduced infrastructure expenses for businesses.
It should be more user-friendly overall, because unless you know how IIS works as a Microsoft product, a system admin cannot just manage it.
Systems Engineer at Atos
Developing any kind of web application server is time-consuming and expensive, and I can use Tomcat as a commodity, which is an existing tool that everybody uses.
Freelance at a tech services company with 11-50 employees
 

Customer Service

Sentiment score
6.5
Users report mixed experiences with Microsoft support, often favoring community resources, but praise premium plan responsiveness.
Sentiment score
6.8
Oracle WebLogic Server support is valued for responsiveness but criticized for costs, response delays, and mixed knowledge levels.
Sentiment score
6.3
Tomcat's support relies on community forums and documentation, with varied ratings and many users resolving issues independently.
There are typically no significant issues.
IT System Administrator at Bouri
Microsoft provides a lot of online documentation to consult before speaking to an expert.
Relationship Manager at a financial services firm with 5,001-10,000 employees
I would rate the support from Microsoft very high because I definitely got all the help during the testing time of the development kit while we were configuring features on our on-premises server.
Systems Engineer at Atos
I would rate customer service and support from Oracle for this product as either nine or ten.
IT Consultant at a tech vendor with 10,001+ employees
We have the portal, which is appropriately escalated based on the severity of the ticket.
Regional Head And Director Product Development at Neptune Software Group
They are proactive in looking into the tickets we create in case we have unresolved queries.
Project Manager at Capgemini
Everything regarding technical support from Apache is in the documentation or in some discussion portal.
Freelance at a tech services company with 11-50 employees
 

Scalability Issues

Sentiment score
7.1
IIS scalability is mixed; effective with clustering and load balancing, but larger scales may need extra infrastructure or cloud migration.
Sentiment score
7.5
Oracle WebLogic Server is highly rated for scalability, effectively managing large datasets and high user loads across settings.
Sentiment score
7.6
Tomcat is highly scalable, supporting large user bases, cloud deployment, and adapts well with Docker and Kubernetes integration.
Cloud solutions may have better scalability options compared to IIS.
Chief Technology Officer at EVtech
It depends on the server environment and the presence of a UPS for power backup.
IT System Administrator at Bouri
I would rate the scalability of IIS as a six, mainly due to integration issues since it cannot integrate with other environments.
Relationship Manager at a financial services firm with 5,001-10,000 employees
I find Oracle WebLogic Server to be highly scalable, rating it as nine out of ten.
IT Consultant at a tech vendor with 10,001+ employees
The biggest benefit I see from Oracle WebLogic Server is that it is beneficial; we are stable through a large volume of transactions.
Regional Head And Director Product Development at Neptune Software Group
 

Stability Issues

Sentiment score
7.8
IIS is praised for enterprise stability, though occasionally challenged by application pool interactions and non-Microsoft technology compatibility.
Sentiment score
7.9
Oracle WebLogic Server is stable and reliable, with improvements and high user ratings, despite occasional issues from third-party modifications.
Sentiment score
7.8
Tomcat is highly stable, integrates with Apache, yet may need tuning for performance under heavy loads or resource-intensive tasks.
I would give it a nine out of ten for stability.
Relationship Manager at a financial services firm with 5,001-10,000 employees
It was secured for us, as we launched the product, and people were accessing it from India and Virginia, and we had no problem.
Systems Engineer at Atos
You can check the memory consumption and the number of crashes.
Senior System Integrations Architect at bs-team
 

Room For Improvement

IIS struggles with compatibility, security, usability, and integration issues, inconsistent performance, costly licensing, and limited technical support.
Oracle WebLogic Server needs performance, pricing, support, and integration improvements, along with enhanced diagnostics and containerization features.
Tomcat struggles with scalability, speed, and usability, needing improvements in security, interfaces, documentation, and enterprise features.
It's influenced by the server's service performance.
IT System Administrator at Bouri
If I compare IIS to other web servers such as Apache, which can be deployed in other environments like Linux, I find IIS is mostly used for simple things.
Relationship Manager at a financial services firm with 5,001-10,000 employees
It should be more user-friendly because unless you know how IIS works as a Microsoft product, a system admin cannot just manage it.
Systems Engineer at Atos
Using scripting allows for the creation of resources.
IT Consultant at a tech vendor with 10,001+ employees
Tomcat needs a more robust logging error details feature; the current logging feature is available, but it should be more user-friendly.
Project Manager at Capgemini
I would like a visual tool for configuration to be added to Tomcat.
Freelance at a tech services company with 11-50 employees
 

Setup Cost

Enterprise users find IIS cost-effective within Windows but some see high licensing fees compared to Linux alternatives.
Oracle WebLogic Server pricing is per-core, higher for advanced features, but competitive among commercial servers.
Enterprise buyers value Tomcat's low cost and open-source model, though extra services can increase expenses.
If you have a Windows license, there is no additional cost for IIS.
IT System Administrator at Bouri
We never had any pricing issue, but I don't know if it is competitive or not.
Systems Engineer at Atos
We are working with an embedded license; for us, it is acceptable, but in reality, the open full license will be costly because it is a number-of-core-based licensing.
Regional Head And Director Product Development at Neptune Software Group
Since it is open source, I don't see any fee for that regarding whether the license for Tomcat is usually expensive or quite affordable.
Freelance at a tech services company with 11-50 employees
 

Valuable Features

IIS offers seamless Microsoft integration, robust management, enhanced security, resource efficiency, user-friendly interface, and robust web hosting support.
Oracle WebLogic Server excels in performance, scalability, and integration, offering robust features and stability for complex applications.
Apache Tomcat is a lightweight, reliable, and scalable open-source server favored for easy deployment, robust performance, and user-friendliness.
It is easy to publish websites with SSL, and it integrates well within the local environment and cloud.
IT System Administrator at Bouri
IIS is free.
Senior System Integrations Architect at bs-team
The configurations are simple, making it very easy to use and to set up everything.
Relationship Manager at a financial services firm with 5,001-10,000 employees
It also offers cluster services, which means I can install, create clusters, and add WebLogic Servers as members.
IT Consultant at a tech vendor with 10,001+ employees
I am able to have a highly scalable, highly demanding, enterprise deployment.
Regional Head And Director Product Development at Neptune Software Group
The advantages of Tomcat include its flexibility; we can increase the heap memory and the size of sessions as per our custom needs.
Project Manager at Capgemini
It is not just simple in terms of interface; it is simple for managing or very quickly running this server.
Freelance at a tech services company with 11-50 employees
 

Mindshare comparison

As of April 2026, in the Application Server category, the mindshare of IIS is 7.1%, up from 6.9% compared to the previous year. The mindshare of Oracle WebLogic Server is 12.0%, down from 25.6% compared to the previous year. The mindshare of Tomcat is 12.9%, down from 19.7% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Application Server Mindshare Distribution
ProductMindshare (%)
Tomcat12.9%
Oracle WebLogic Server12.0%
IIS7.1%
Other68.0%
Application Server
 

Featured Reviews

Krishnakumar Natarajan - PeerSpot reviewer
Systems Engineer at Atos
Designs and manages multiple websites while ensuring data backup and disaster recovery
I have experience with AWS, and I am most familiar with the server environment, as we just use the server environment and then use Microsoft products on an AWS environment. I have experience with Windows Server IIS, which I ran on my own on-premise data center. The website was developed and then hosted, and through IIS, we managed the servers. The manageability within the IIS environment is not very difficult. For server management, you need to ensure data backup, data restore, and you have a DR configured to keep the database intact. It was done on-premises, so I had no problem doing that. If you have to go to the cloud, then you should have the storage connected to the IIS server and also have a DR set up for that. I didn't use Microsoft Azure tools, but since it is a Microsoft product, Azure has all the portability, so you don't have to worry about compatibility on the cloud. On a scale of 1-10, I would rate this solution a 10.
Thomas Waltair - PeerSpot reviewer
Regional Head And Director Product Development at Neptune Software Group
Stable and scalable enterprise deployment with Cloud-Native support
Oracle WebLogic Server helps with my deployment strategy in both monolithic as well as Cloud-Native ways. I think it is useful; this Cloud-Native support helps with deployment in both on-prem and cloud. For container deployment, we are not very rich. We are in the process of moving our business logic to containerization. But in terms of this being a big product, a core banking system, I prefer on-prem rather than cloud. The use cases and the scrum help me a lot in an iterative, incremental manner. I would recommend this product; it is an enterprise, large volume, and of course, it is worth it to deploy. I am providing this review with a rating of 9.
Sanjay Sahu - PeerSpot reviewer
Project Manager at Capgemini
Customization and flexibility enhance web applications while support effectively resolves queries
Regarding improvements in Tomcat, I personally haven't used it very extensively, but all Apache products are very useful for our web applications. Although the web server setup is a little different, it has everything we have been using, and as of now, everything is good with no deficiencies that need improvement. I think that Tomcat needs a more robust logging error details feature; the current logging feature is available, but it should be more user-friendly. This improvement would make error handling more user-friendly.
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Top Industries

By visitors reading reviews
Financial Services Firm
12%
Computer Software Company
10%
Comms Service Provider
9%
Government
8%
Financial Services Firm
15%
Government
10%
Comms Service Provider
8%
Manufacturing Company
8%
Financial Services Firm
20%
Government
13%
Comms Service Provider
10%
Computer Software Company
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business29
Midsize Enterprise11
Large Enterprise22
By reviewers
Company SizeCount
Small Business15
Midsize Enterprise6
Large Enterprise17
By reviewers
Company SizeCount
Small Business23
Midsize Enterprise4
Large Enterprise28
 

Questions from the Community

Which is better - IIS or NGINX Plus?
IIS is a flexible, secure, and manageable web server to host anything on the web. IIS’s scalable and open architectur...
What is your experience regarding pricing and costs for IIS?
For the pricing, setup cost, and licensing for IIS, as a Microsoft product, I didn't think much about separately purc...
What needs improvement with IIS?
I see that IIS has maintained the same interface for a long time, so they could potentially use more automation or in...
What needs improvement with Oracle WebLogic Server?
I am not sure at this stage about any areas for improvement.
What is your primary use case for Oracle WebLogic Server?
The main purposes for which I use Oracle WebLogic Server is for enterprise deployment. It is an enterprise applicatio...
What do you like most about Tomcat?
Tomcat's ease of use has positively impacted project timelines. Tomcat already has high availability – it doesn't go ...
What needs improvement with Tomcat?
Tomcat lacks a visual tool for configuring. Everything is from the command line. I would like a visual tool for confi...
What is your primary use case for Tomcat?
I work with Tomcat as a programmer, but not as an administrator. My major use case involves using Tomcat, mostly encl...
 

Also Known As

Windows Server IIS
WebLogic Application Server
No data available
 

Overview

 

Sample Customers

Erste Bank Group, NJVC, Samsung Electronics, Sheraton Hotels and Resorts, Tata Steel Europe, Urban Software Institute
Colab Consulting Pty. Ltd., Infosys Ltd., Sascar, Banca Transilvania, UL, Center for Railway Information Systems, SPAR Austria Group, Reliance Commercial Finance, Industrial Bank of Korea, Al Jaber Group, Safe Water Kenya, Chhattisgarh Infotech and Biotech Promotion Society
1. Adobe Systems 2. Amazon 3. Apple 4. AT&T 5. Bank of America 6. Boeing 7. Cisco Systems 8. Citigroup 9. Dell 10. eBay 11. Facebook 12. General Electric 13. Google 14. Hewlett-Packard 15. IBM 16. Intel 17. JPMorgan Chase 18. Microsoft 19. Netflix 20. Oracle 21. PayPal 22. Salesforce 23. Samsung 24. Sony 25. Target 26. Twitter 27. Uber 28. Verizon 29. Visa 30. Volkswagen 31. Walmart 32. Yahoo
Find out what your peers are saying about Apache, Red Hat, Oracle and others in Application Server. Updated: March 2026.
885,789 professionals have used our research since 2012.