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Mendix vs OpenLegacy 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:
 

Categories and Ranking

Mendix
Ranking in AI Software Development
11th
Average Rating
8.2
Reviews Sentiment
6.9
Number of Reviews
61
Ranking in other categories
Mobile Development Platforms (2nd), Rapid Application Development Software (5th), Low-Code Development Platforms (3rd), Agentic Automation (5th), Business Orchestration and Automation Technologies (10th)
OpenLegacy
Ranking in AI Software Development
44th
Average Rating
7.6
Reviews Sentiment
6.2
Number of Reviews
5
Ranking in other categories
API Management (37th)
 

Mindshare comparison

As of January 2026, in the AI Software Development category, the mindshare of Mendix is 0.7%, down from 3.2% compared to the previous year. The mindshare of OpenLegacy is 0.4%. It is calculated based on PeerSpot user engagement data.
AI Software Development Market Share Distribution
ProductMarket Share (%)
Mendix0.7%
OpenLegacy0.4%
Other98.9%
AI Software Development
 

Featured Reviews

Mitchel Mol BGS - PeerSpot reviewer
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.
reviewer1042905 - PeerSpot reviewer
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.

Quotes from Members

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

Pros

"Enables us to rapidly create a complex application. We are also able to customize features that stakeholders in the corporation want to see, something that could not be done with other software. Our workflows and processes have evolved and improved. The fast iterations allow us to be nimble, get feedback from users, and do rapid updates."
"I highly regard Mendix because of its proper support, troubleshooting options, extensive learning path, and the availability of different types of exams."
"On a recent project, using Mendix cut development time by about 40-50% compared to traditional coding for a workflow app."
"Mendix provides the ability to create solutions that fill gaps that I would otherwise be unable to address with standard software."
"It is stable."
"On a recent project, using Mendix cut development time by about 40-50% compared to traditional coding for a workflow app."
"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."
"Suite allows you to easily and smoothly integrate with pretty much anything. It is also cloud-enabled. It provides a full Cloud Foundry-driven cloud environment with one-click deployment."
"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."
"OpenLegacy produces a war file which includes everything you need to deploy a Tomcat server."
"Using mainframe programs (not screens), the OpenLegacy services do not require any changes by the mainframe programmers, thus reducing development cycles."
"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."
"Using OpenLegacy, the exposure of services is far easier and quicker. In many cases, exposure of services requires just a few clicks and takes only minutes. In very complex cases, it still only takes half a day. Without OpenLegacy, it would take us several months to create the same services."
"It is possible to solve larger legacy API issues on an enterprise level with this product."
"Opens the door to connect modern web products to an 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."
 

Cons

"It could use a more comprehensive widget creation studio in the IDE."
"Mendix could improve in customization and UI, UX flexibility, native mobile development, and agile tooling for developers."
"Mendix can be improved in that, while it is good at pricing, it lacks a small business budget project for startups wanting to build their portfolio."
"There are not enough developers who are using Mendix. The knowledge base available online and in the market is not as rich as other competitors."
"The platform still has many areas for improvement. If I compare apples to apples, the PWA features of Mendix could be improved, for example, I wouldn't recommend creating a B2C or B2B marketplace or web portals on Mendix, but there's a tendency for people to still do it through the systems provided by my company, particularly implement B2B or B2C marketplace, versus using eBay or Shopify. On the web portal front, Mendix still needs to improve."
"One area for improvement is its integration capabilities. Creating a pluggable widget or integrating it with other systems is challenging. In terms of features, it would be great to see advancements such as AI services and the integration of third-party services. Additionally, connecting external devices to the application requires multiple steps. Improving this will make it easier for the developers."
"Needs multiple database connections so an app can directly read/write data to/from multiple databases. This would enable easy splitting of big applications that have complex entity relationships."
"We'd like to be able to write in C Sharp to develop code for Mendix."
"Customer support for the product is slow and not very good. It makes using the product difficult if you need help quickly."
"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."
"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."
"Debugging and logging for programmers could be better."
"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."
 

Pricing and Cost Advice

"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."
"The solution is a bit expensive compared to others"
"Licensing costs are similar to those for all other IT technology, but they vary by region."
"From a commercial point of view, we would like them to change that they currently sell it as a platform, but as a customer you have to decide upfront the usage of the platform. We would like to have Mendix sell it as a pay as you go model: You pay for what you use, and you don't pay for what you don't use."
"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."
"Initially, we started with a year for approximately $25,000, and if we need to expand the number of seats then we will increase it."
"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."
"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
12%
Computer Software Company
11%
Retailer
6%
No data available
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business28
Midsize Enterprise7
Large Enterprise25
No data available
 

Questions from the Community

What do you like most about Mendix?
We also use Mendix Enterprise Integration for complex business logic. It's a low-code platform, so we run Mendix in the Mendix Cloud.
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.
What needs improvement with Mendix?
Improvements for Mendix include that sometimes it gets hung while loading.
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Comparisons

 

Overview

 

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...
Find out what your peers are saying about Mendix vs. OpenLegacy and other solutions. Updated: December 2025.
881,114 professionals have used our research since 2012.