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IBM Rational System Architect vs erwin Data Modeler comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Aug 19, 2025

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

erwin Data Modeler
Ranking in Enterprise Architecture Management
4th
Average Rating
8.6
Reviews Sentiment
7.2
Number of Reviews
39
Ranking in other categories
Business Process Design (10th)
IBM Rational System Architect
Ranking in Enterprise Architecture Management
19th
Average Rating
7.4
Number of Reviews
5
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of August 2025, in the Enterprise Architecture Management category, the mindshare of erwin Data Modeler is 10.0%, down from 10.4% compared to the previous year. The mindshare of IBM Rational System Architect is 1.8%, down from 2.1% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Enterprise Architecture Management
 

Featured Reviews

JorgeSanz - PeerSpot reviewer
Streamline data modeling and automate network changes for increased efficiency
The initial setup depends on the tool if you are using the data model environment. Stopping the server could be complex and require strong expertise. If you have everything set up and configured, Erwin is straightforward. You can deploy it in a few hours. In our case, it took a couple of months to address internal conditions, assign machines, and set up everything for the services. I rate the initial setup a six out of ten, where one is difficult and ten is easy.
GM
Lots of valuable features, especially the metamodel customization
In terms of what could be improved, we did not take the whole package with all the modules, and I think that the integration with other platforms like Office could be better. The reverse engineering of the database is already there, but in the next release I would like to see some pilot supplied with the solution in order to address any database.

Quotes from Members

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

Pros

"We find that its ability to generate database code from a model for a wide array of data sources cuts development time. The ability to create one model in your design phase and then have it generate DDL code for Oracle or Teradata, or whichever environment you need is really nice. It's not only nice but it also saves man-hours of time. You would have to take your design and just type in manually. It has to take days off out of the work."
"I have worked with erwin Data Modeler for quite some time and familiarity is its most valuable feature."
"The most valuable features are being able to visualize the data in the diagrams and transform those diagrams into physical database deployments. These features help, specifically, to integrate the data. When the source data is accumulated and modeled, the target model is in erwin and it helps resolve the data integration patterns that are required to map the data to accommodate a model."
"It's a safeguard for me because I'm always concerned that somebody is free handing it and will forget a key coming from the parent. The migrating keys are a great feature. Identifying relationships, non-identifying relationships, and being visually right there to understand the differences are great features. erwin is key to being able to visually understand whatever the customer is requesting. They'll give you words on a paper, but once they can actually view it as a picture, it really comes to life. The data comes to life to where they understand exactly what they're asking for."
"The fitting model is very intuitive."
"When you're getting down to the database level, where you're building a design and you're creating DDL out of it, or you're going in the other direction where you're reaching into system catalogs and bringing things back, that starts to really require specialization. Visio isn't going to reverse-engineer that for you. Those features in erwin are valuable."
"We use the Forward and Reverse Engineering tools to help us speed things up and create things that would have to be done otherwise by hand. E.g., getting a database into a data model format or vice versa."
"The principal feature that I liked is that the solution has a very graphic interface."
"The solution is pretty stable."
"There are a lot of features I find valuable, but I think that the metamodel customization is one of the best features that the solution offers."
"The user interface is good. It's both clear and comprehensible. It's easy to work with."
"We have seen ROI with this solution over the years that we have used it."
 

Cons

"I would like to see improved reporting and, potentially, dashboards built on top of that. Right now, it's a little manual. More automated reporting and dashboard views would help because currently you have to push things out to a spreadsheet, or to HTML, and there aren't many other options that I know of. I would like to be able to produce graphs and additional things right in the tool, instead of having to export the data somewhere else."
"I would like the solution to be less rigid in terms of its theory."
"I am not so happy with its speed. Sometimes, it can have problems with connections."
"The solution's reporting side needs to be improved."
"The navigation is a little bit of a challenge. It's painful. For example, if you've got a view open and you want to try to move from side to side, the standard today is being able to drag and drop left and right. You can't really do that in the model. Moving around the model is painful because it doesn't follow the Windows model today."
"I love the product. I love the ability to get into the code, make it automated, and make it do what I want. I would like to see them put some kind of governance over the ability to make changes to the mart tables with the API, so that instead of just using the modeler's rights to a table -- it has a separate set of rights for API access. That would give us the ability to put governance around API applications. Right now a person with erwin and Excel/VBA has the ability to make changes to models with the API if they also have rights to make changes to the model from erwin. It's a risk."
"It would be nice to have it on the Linux platform, not just Windows. If they can support Linux, there would be a huge market for it."
"The solution's model mark could be better because it crashes sometimes."
"There needs to be more information at the outset about how to use the solution and how to deploy it. The deployment process needs improvement."
"This solution can be more user-friendly and easier to use, with better dashboards."
"The solution needs to better integrate with other products, like Microsoft."
"The reverse engineering of the database is already there, but in the next release I would like to see some pilot supplied with the solution in order to address any database."
 

Pricing and Cost Advice

"The pricing of the solution is cheap. I rate the pricing a five out of ten."
"erwin Data Modeler by Quest is an expensive solution."
"The tool is expensive."
"There are two license options and the pricing is reasonable."
"erwin is expensive compared to other solutions. We are paying almost $6,000 per seat a month."
"The solution is expensive."
"I wish it wasn't so expensive. I would love to personally buy a copy of my own and have it at home, because the next job that I'm looking at is probably project management and I might not have access to the tool. I would like to keep my ability to use the tool. Therefore, they should probably have a pricing for people like me who want to just use the solution as an independent consultant, trying to get started. $3,000 is a big hit."
"erwin has this option where you pay a one-time fee and you have the license for six years, which makes sense because I don't upgrade my database engine every other year. I have an application that depends on it. This is something weird about PowerDesigner. There are no additional costs beyond the standard licensing fee."
Information not available
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Top Industries

By visitors reading reviews
Financial Services Firm
18%
Manufacturing Company
9%
Government
8%
Computer Software Company
7%
Manufacturing Company
19%
Financial Services Firm
12%
Government
10%
Computer Software Company
7%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
 

Questions from the Community

What do you like most about erwin Data Modeler by Quest?
Forward engineering, DDL generation, reverse engineering, and reporting are the most valuable features of the solution.
What is your experience regarding pricing and costs for erwin Data Modeler by Quest?
The product is expensive. I rate the product’s pricing a nine out of ten, where one is cheap and ten is expensive.
What needs improvement with erwin Data Modeler by Quest?
As a documenting tool, it's solid, though its reporting could be more robust. The reporting mechanisms could be more intuitive regarding report creation. It can generate reports in CSV files, displ...
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Also Known As

erwin DM
Rational System Architect
 

Overview

 

Sample Customers

 Premera, America Honda Motors, Aetna, Kaiser Permanente, Dental Dental Cali, Cigna, Staples
Wuxi Lake Cloud, Nationwide, ETI, IDS Scheer
Find out what your peers are saying about IBM Rational System Architect vs. erwin Data Modeler and other solutions. Updated: July 2025.
865,295 professionals have used our research since 2012.