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UNICOM System Architect vs erwin Data Modeler comparison

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Comparison Buyer's Guide

Executive SummaryUpdated on Mar 1, 2026

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
1st
Average Rating
8.4
Reviews Sentiment
6.0
Number of Reviews
54
Ranking in other categories
Business Process Design (7th), Data Governance (10th)
UNICOM System Architect
Ranking in Enterprise Architecture Management
22nd
Average Rating
6.0
Number of Reviews
2
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of September 2026, in the Enterprise Architecture Management category, the mindshare of erwin Data Modeler is 8.4%, down from 8.9% compared to the previous year. The mindshare of UNICOM System Architect is 1.6%, up from 1.0% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Enterprise Architecture Management Mindshare Distribution
ProductMindshare (%)
erwin Data Modeler8.4%
UNICOM System Architect1.6%
Other90.0%
Enterprise Architecture Management
 

Featured Reviews

Sushree Panigrahi - PeerSpot reviewer
Snowflake Data Engineer| Senior PLSQL Developer |Data Modeler|Assitant Vice Pre at Jp Morgan Chase & Co.
Data modeling has transformed regulatory reporting and collaboration across cloud environments
In erwin Data Modeler, areas that have room for improvement include performance improvements. I see that large models sometimes cause it to be slow when opening. Impact analysis can lag as well. Version control is another aspect. If we have developed a current version, it is not integrated with Git where we can easily compare different versions. UI modernization is also something we cannot utilize as it is primarily for development. Additionally, cloud-specific optimizations are needed when it comes to Snowflake or Databricks. When it comes to AI aspects, auto-suggestions for normalization or identifying primary, foreign, or surrogate keys are areas that can be improved.
reviewer1261290 - PeerSpot reviewer
Project Manager at a government with 10,001+ employees
Useful for creating build-outs and architecture views, but requires a publisher add-on for some detailed reports
I don't use the tool or know a lot. It is going to have some shortcomings. When it comes down to publishing, we just found out this week that they actually have a publisher add-on. So, what we were trying to publish was not giving a detailed report about the architecture, views, etc. I just wish they had sent these to UNICOM and contacted them about add-on features for the publishing part of the tool.

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 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."
"The solution's ability to compare and synchronize data sources with data models is fantastic. We use it for that on a regular basis to make sure that changes haven't been made to the database outside of the modeling process. I can take existing databases and reverse engineer them and understand their structure within 15 minutes. If I didn't have Data Modeler it would take hours. It increases our productivity and helps in understanding our legacy application."
"The solution's ability to compare and synchronize data sources with data models is fantastic."
"This tool is beneficial to any organization as it is foundational; there is no better way than this, and it is a must-have for every organization, whether large or small."
"The modeling portion of the tool is the most valuable. There are some notes, naming standards, and other functions that we use as well. There's a whole boatload of functionality in this thing and we use maybe 10% of it. It seems to be pretty common that not all the functionality is fully utilized. But it's just got gobs and gobs of stuff that you can implement if you so choose to."
"We can create mappings in erwin and possibly data dictionaries."
"The tool is also very intuitive and easy to use."
"The most valuable features are the ability to reverse engineer and do model comparison. With the reverse engineering, I can understand the databases from third-party products. With the model comparison, I can track the differences between two versions of the same database."
"It is useful for creating build-outs and architecture views and for publishing reports and stuff like that for different programs."
"It has good end-to-end metamodel interrelationships."
 

Cons

"I believe erwin Data Modeler could be improved in a few areas, particularly performance, especially when dealing with large models that contain thousands of tables, as opening those models and running impact analysis can become slow."
"The solution's model mark could be better because it crashes sometimes."
"I still use Visio for conceptual modeling, and that's mainly because it is easier to change things, and you can relax some of the rules."
"As erwin Data Modeler files get larger, the response time really slows down, and when I have multiple files open I sometimes get a glitch where a lot of the text fields get solid black and the first eight characters of column names might be blacked out with a rectangle."
"The interface must be improved."
"We find erwin DM less valuable creating initial drafts and reverse-engineering databases and there are still a lot of extensions to the scripting language that are not included with the erwin product."
"I find the UI very clunky and very difficult to use. If I add columns to a table the whole workflow could be so much easier. I get frustrated using it. I've tried other tools. I've tried to get off of erwin a few times. I always come back to it because every tool has its own set of problems, and it seems like if I have to pick my poison, I stay with erwin. But so many things that are clunky with it."
"The price should be reduced."
"I don't use the tool or know a lot. It is going to have some shortcomings. When it comes down to publishing, we just found out this week that they actually have a publisher add-on. So, what we were trying to publish was not giving a detailed report about the architecture, views, etc. I just wish they had sent these to UNICOM and contacted them about add-on features for the publishing part of the tool."
"They need to add reports that show the enterprise architecture perspectives, and the dashboards should be comfortable for the senior enterprise architects so that they can view the complete landscape."
"UNICOM System Architect is quite a dated tool. The usability needs to be improved."
 

Pricing and Cost Advice

"This company had bought the license for three years, and it's not an individual license. While you can buy a license for each individual, that would be very expensive. There is something called concurrent licenses where you can purchase licenses in bulk and 15 to 20 people can access the license and model. Concurrent licenses are scalable to the number of users and are proportional to the cost."
"We've continued to use the product for many years and compared it with others on the market. The pricing is reasonable considering what the solution offers and what we pay. There are cheaper tools, but they may not be as robust and easy to use, so it's worth the money."
"Though the solution is not cheap, it's worth the money."
"erwin is expensive compared to other solutions. We are paying almost $6,000 per seat a month."
"The tool is expensive."
"The pricing of the solution is cheap. I rate the pricing a five out of ten."
"An issue right now would be that erwin doesn't have a freely available browser (that I am aware of) for people who are not data modelers or data engineers that a consumer could use to look at the data models and play with it. This would not be to make any changes, but just to visually look at what exists. There are other products out there which do have end user browsers available and allow them to access data models via the data modeling tool."
"I don't specifically know what we're paying now. About three years ago, in another organization, I have this memory of 6,000 AUD a seat or something like that, but I am not sure. In the mid-2000s, it was something like 1,200 AUD a seat. I get the impression that there was a price jump when it was spun off from CA as a separate company, which is understandable, but it could sometimes be a barrier in some organizations picking it up. I haven't talked to erwin people yet, but I'm going to suggest to them that they could perhaps think of having an entry-level product that is priced a bit lower, and then, you can buy the extra suite."
"I don't remember the price. It is a different cost for just buying it, and then you have a maintenance cost, which you need to renew every year."
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Top Industries

By visitors reading reviews
Financial Services Firm
14%
Outsourcing Company
9%
Marketing Services Firm
7%
Manufacturing Company
6%
No data available
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business17
Midsize Enterprise4
Large Enterprise43
No data available
 

Questions from the Community

What is your experience regarding pricing and costs for erwin Data Modeler by Quest?
The experience with pricing, setup cost, and licensing is that the licensing process is painful and quite onerous. The setup is okay, but there is room for improvement.
What needs improvement with erwin Data Modeler by Quest?
Regarding improvements, the first thing I would mention is that every release has some issues, some of which are related to current functionalities, which means they often seem not very well tested...
What is your primary use case for erwin Data Modeler by Quest?
My main use case for erwin Data Modeler is to implement a single data architecture design department so everyone is using erwin Data Modeler for their data models to be a transactional application ...
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Also Known As

erwin DM
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Overview

 

Sample Customers

 Premera, America Honda Motors, Aetna, Kaiser Permanente, Dental Dental Cali, Cigna, Staples
Apple, Facebook, Google, HSBC, PayPal
Find out what your peers are saying about UNICOM System Architect vs. erwin Data Modeler and other solutions. Updated: September 2026.
913,806 professionals have used our research since 2012.