Mendix vs OpenLegacy comparison

Mendix and OpenLegacy are both solutions in the AI Software Development category. Mendix is ranked #10 with an average rating of 8.0, while OpenLegacy is ranked #101. Mendix holds a 0.7% mindshare in ASD, compared to OpenLegacy’s 0.5% mindshare. Additionally, 95% of Mendix users are willing to recommend the solution, compared to 80% of OpenLegacy users who would recommend it.

Mendix

Read 63 Mendix reviews

9,064 Views
1,088 Comparison Views

95% willing to recommend

OpenLegacy

Read 5 OpenLegacy reviews

1,455 Views
480 Comparison Views

80% willing to recommend

Mendix

OpenLegacy

Comparison Buyer's Guide

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Executive Summary

We performed a comparison between Mendix and OpenLegacy based on real PeerSpot user reviews.

Find out in this report how the two AI Software Development solutions compare in terms of features, pricing, service and support, easy of deployment, and ROI.

To learn more, read our detailed Mendix vs. OpenLegacy Report (Updated: April 2026).

Buyer's Guide

Mendix vs. OpenLegacy

April 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

Mendix

Ranking in AI Software Development

10th

Average Rating

8.2

Reviews Sentiment

6.8

Number of Reviews

Ranking in other categories

Mobile Development Platforms (1st), Rapid Application Development Software (4th), Low-Code Development Platforms (2nd), Agentic Automation (5th), Business Orchestration and Automation Technologies (11th)

OpenLegacy

Ranking in AI Software Development

101st

Average Rating

7.6

Reviews Sentiment

6.2

Number of Reviews

Ranking in other categories

API Management (33rd)

Mindshare comparison

As of May 2026, in the AI Software Development category, the mindshare of Mendix is 0.7%, down from 1.8% compared to the previous year. The mindshare of OpenLegacy is 0.5%. It is calculated based on PeerSpot user engagement data.

AI Software Development Mindshare Distribution
Product	Mindshare (%)
Mendix	0.7%
OpenLegacy	0.5%
Other	98.8%

AI Software Development

Featured Reviews

Mitchel Mol BGS

CTO at Blue Green Solutions

Has improved development quality and speed but has introduced persistent IDE slowdowns

In recent years, the IDE has been more buggy and slower, and although there have been more features added, I would like to see more stability, as some areas that used to work for a fairly long time are now slower in my development, which feels like a step back. I choose a seven mainly due to the issues we've faced with slowdowns and bugs during development, while runtime has been very stable, and the overall output on Mendix platform is still good; there is definitely some room for improvement, and I would probably have given it an eight or even a nine if those issues weren't hurting my developer output for the past few years. Overall, Mendix platform is stable, but the IDE could be better.

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reviewer1042905

VP, Chief Enterprise Integration Architect at a financial services firm with 10,001+ employees

The biggest advantage is how simple the technology was.

I'd like to see OpenLegacy develop its low-code/no-code (LCNC) solutions. They've expanded somewhat their horizons for integration beyond mainframe CICS, which is their sweet spot. They have some tooling in that area, but it's not as good as it needs to be. OpenLegacy handles the bread-and-butter TP monitoring stuff, but I am working for one of the six banks in the United States still using the Hogan mainframe, which has a slightly proprietary mechanism. But OpenLegacy currently doesn't have a connector for Hogan. So it would help if they could build one. That would appeal to financial institutions that still use Hogan, like US Bank, Wells Fargo, KeyBank, and Vanguard.

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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

"The most valuable features of Mendix are the drag and drop functions, the data entities, domain models, and all the related features."

"It is stable."

"The most valuable features of the product are its ease of use and speed. My friend and I find it helpful as a team of just two developers."

"The domain model of Mendix is highly valuable as it allows quick setup and public deployment."

"The built-in security makes security-by-design from the start possible."

"The solution was good in our tests but we could not get a hold of the company for further inquiries."

"The features that I have found most valuable with Mendix are its business process management and its minimal low code, both from an interface perspective and from a process perspective."

"I find the fast development speed and low cost to be very valuable features of Mendix. It's a smart solution for busy developers when we need to apply new changes or fixes quickly. Mendix helps to save time and meet project deadlines faster."

More Mendix pros

"OpenLegacy provides a way to go from the outside world to the legacy mainframe, to move the old standard application to a REST API application. New digital services can be created in a few clicks and this can be done easily by COBOL programmers."

"Without OpenLegacy, it would take us several months to create the same services."

"The product has helped our business by allowing us to become more efficient in data handling."

"The biggest advantage of OpenLegacy was how simple the technology was, and we were able to build out the OpenLegacy parts very quickly, putting together a couple hundred APIs in six months."

"The biggest advantage of OpenLegacy was how simple the technology was. We were able to build out the OpenLegacy parts very quickly. We put together a couple hundred APIs in six months."

"The speed of development of production, especially in specific environments like IBM mainframes, has been valuable."

"OpenLegacy opens the door to connect modern web products to our old legacy system."

"It is possible to connect a service to a mainframe program or back transaction in a matter of minutes or hours at the most."

More OpenLegacy pros

Cons

"The cost of total ownership needs to be better. The licenses are very expensive."

"There is always a layer of custom code required."

"There should be more integration with engineering applications and tighter integration for user authentication, such as single sign-on, etc. They have some of that. It just could be stronger."

"Mendix could improve in customization and UI, UX flexibility, native mobile development, and agile tooling for developers."

"A constraint of Mendix is that you have to look for the required plugins which takes up development time."

"The vendor should focus more on the opinion of the users and make improvements"

"The platform still has many areas for improvement."

"I would also like to see automatic adjustment to the Java Heap, whenever an application load becomes too much for the application. It could also use hot database replication."

More Mendix cons

"The pricing of the solution could be more flexible and allow for once-off payment versus annual licensing."

"I would like to see SSL out-of-the-box. OpenLegacy certainly does SSL, but it was not the default for our use case."

"I'd like to see OpenLegacy develop its low-code/no-code (LCNC) solutions. They've expanded somewhat their horizons for integration beyond mainframe CICS, which is their sweet spot. They have some tooling in that area, but it's not as good as it needs to be."

"Debugging and logging for programmers could be better."

"I would like to see SSL out-of-the-box. OpenLegacy certainly does SSL, but it was not the default for our use case. We are currently working with OpenLegacy to cross the SSL bridge and suspect that most users will want to do the same."

"We would also be more than happy if the product had the option to work in the opposite direction – the ability to consume REST/SOW services in the outer world from the mainframe."

"The pricing of the solution could be more flexible and allow for once-off payment versus annual licensing. This would be more appealing to companies in Latin America."

"Customer support for the product is slow and not very good. It makes using the product difficult if you need help quickly."

More OpenLegacy cons

Pricing and Cost Advice

"Mendix licensing cost is based on the number of apps you have on the server. At the basic level, it is free of charge, so that seems reasonable, but once you go beyond that, and when it comes to the number of users on the app, that basic structure doesn't work, and the pricing tends to get a little bit steep."

"Mendix seems a bit expensive. But in terms of wanting to have less developers and higher velocity, the total cost of ownership is fine. It's not cheap, though."

"Licensing costs are similar to those for all other IT technology, but they vary by region."

"There is a license required to use Mendix. The solution's price is high, but it is best suited for enterprise companies that have the budget. It is not for small or medium-sized businesses."

"The solution is a bit expensive compared to others"

"Its cost is higher than competitors. The cost mostly includes licensing. It is charged per user. The cost model could be better. When you have a big company, what does per user mean? If I have a company where I have 40,000 people who will go to access it but only 200 do, how do you license it and who do you pay for? If they hit it once, do you pay for it? The licensing is complex for a big company. It is easy for us to buy all we can eat, get an enterprise license agreement, and call it good."

"Pricing used to be complex, but Mendix has improved that quite a bit."

"I would not recommend the solution to small and medium-sized businesses because it’s expensive. It’s great for big organizations. I rate the pricing as a three out of ten."

More Mendix pricing and cost advice

"The pricing of the solution could be more flexible and allow for once-off payment versus annual licensing. This would be more appealing to companies in Latin America."

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Top Industries

By visitors reading reviews

Manufacturing Company

13%

Financial Services Firm

11%

Computer Software Company

Construction Company

26%

Comms Service Provider

13%

Financial Services Firm

12%

Insurance Company

10%

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

By reviewers
Company Size	Count
Small Business	29
Midsize Enterprise	7
Large Enterprise	25

No data available

Questions from the Community

What is your experience regarding pricing and costs for Mendix?

I do not have much experience with the pricing, setup cost, and licensing because the sales or business team usually handles that, and as a developer, I don't have a clear idea.

See all answers

What needs improvement with Mendix?

I think Mendix can be improved by supporting automated tests more easily. For example, Mendix can add some IDs for each component to build the automation tests more easily.

See all answers

What is your primary use case for Mendix?

I use Mendix to build a system about the consultation of APIs. We are using Mendix to build a system to check SAP, which is another system, and we use APIs to bring information from SAP to this pro...

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Product Reports

Buyer's Guide

Mendix

April 2026

Download Mendix product report

Buyer's Guide

OpenLegacy

April 2026

Download OpenLegacy product report

Overview

Mendix offers a robust low-code platform that accelerates application development and enhances business-IT collaboration with strong integration and customization capabilities.

Mendix enables rapid prototyping with visual modeling tools like microflows, aiding seamless cloud deployment with scalability and security. Its low-code environment and reusable widgets support easy REST and SOAP integration. Application development is efficient, bridging business needs with minimal coding effort.

What are Mendix's key features?

Rapid Application Development: Speeds up development with low-code tools and visual modeling.
Integration Capabilities: Supports easy integration with REST, SOAP, and systems like SAP.
Visual Modeling Tools: Offers microflows for simplified process automation.
Cloud Deployment: Provides robust scalability and secure cloud-based solutions.
Customization: Flexible UI components and reusable widgets for tailored solutions.

What benefits should users look for in reviews?

Faster Time-to-Market: Accelerates development timelines with low-code features.
Flexibility: Adapts to diverse applications in banking, insurance, and manufacturing.
Scalability: Supports growth with strong cloud infrastructure.
Enhanced Collaboration: Bridges business and IT for seamless digital execution.
Integration Ease: Easily integrates with existing systems and improves workflows.

In banking, insurance, and manufacturing, Mendix is adopted for developing web and mobile applications. It aids in automating processes and integrating seamlessly with existing systems like ERP. Businesses leverage Mendix's flexibility in creating scalable and customized applications to streamline workflows and drive digital transformation efforts.

Mendix

OpenLegacy integrates legacy customer data with REST APIs, speeding up mobile transactions and code updates while simplifying API development. Its open-source platform offers flexibility, benefiting mainframe environments and Tomcat server deployments.

OpenLegacy is crucial for organizations aiming to integrate modern web applications with legacy systems. The platform is widely used in financial and logistics sectors to enable quick access to customer data and transactions, effectively monetizing mainframe assets. By facilitating the rapid creation of numerous APIs, OpenLegacy supports seamless interactions between applications, allowing modern web form inputs into legacy systems. Its flexibility and extensive capabilities simplify API development and deployment, proving valuable for those managing day-to-day banking and transaction data. However, room for improvement includes better debugging, logging, SSL integration, flexible pricing options, and support availability, especially for Hogan mainframe users.

What features define OpenLegacy?

REST API Integration: Facilitates integration with mobile transactions.
Faster Code Updates: Delivers efficiency in code changes for mainframe environments.
Open-Source Flexibility: Offers customization and broad capabilities.
Tomcat Deployment: Supports straightforward deployment via Tomcat servers.
Rapid API Development: Enables swift creation of multiple APIs.

What ROI benefits should users expect?

Legacy System Monetization: Transforms mainframe assets into profit.
Improved Integration: Enhances access to critical customer data and transactions.
Efficient Operations: Streamlines daily banking and transaction management.
Cost-Effectiveness: Flexibility and open-source nature reduce expenses.
Enhanced Interoperability: Allows seamless interaction between old and new applications.

Financial and logistics companies leverage OpenLegacy to link web applications with legacy systems, ensuring quick customer data and transaction access. This integration supports rapid solution building and efficient management of banking and transaction data, particularly benefiting institutions like US Bank and Wells Fargo needing comprehensive Hogan mainframe connectors.

OpenLegacy

Sample Customers

Genzyme, TNT, Yahoo, Capgemini, Roche, D&B, Aegon, kpn, AZL, Sky, Arch, Penn State Univeristy, BancABC

Many of openLegacy's global customers are among the Global 100 companies. Review case studies in these industries: Agriculture, Airport Authority, Automotive, Auto, Finance, Insurance, Government, Healthcare, Manufacturing, and Retailwww.openlegacy.com/case-studie...

Buyer's Guide

Mendix vs. OpenLegacy

April 2026

Free Report: Mendix vs. OpenLegacy

Find out what your peers are saying about Mendix vs. OpenLegacy and other solutions. Updated: April 2026.

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