Software Alternatives & Startups

UMLet VS ViewForge

Compare UMLet VS ViewForge and see what are their differences

UMLet

UMLet - Free UML Tool for Fast UML Diagrams

Rating
0 reviews
ViewForge

Year/Make/Model fitment search for Shopify. 8 verticals, Smart Parse, and your data in Shopify metaobjects — not a vendor database. Free tier, Pro at $49.

Rating
0 reviews
Pricing
Freemium Free trial $19 / Monthly ($19/month Starter 1,000 products, custom templates, CSV import)
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Based on our record, UMLet seems to be more popular. It has been mentioned 1 time since March 2021.

social mentions
1 vs 0
Diagrams popularity
100% vs 0%

Base details

Website, pricing, platforms and company facts side by side.

UMLet
ViewForge
Website umlet.com normalview.pro
Pricing —
Freemium Free trial $19 / Monthly ($19/month Starter 1,000 products, custom templates, CSV import) Official pricing
Platforms —
Shopify
Company — Startup from the United States · 1 - 9 employees · 2026
Listed in

About UMLet and ViewForge

In their own words, as submitted to SaaSHub.

UMLet
ViewForge

No description of UMLet yet.

ViewForge is a Year Make Model (YMM) parts finder for Shopify. Shoppers pick their vehicle, machine or device from cascading dropdowns and see only the parts that fit. Fitment search works across eight verticals — auto, motorcycle, tractor, marine, power equipment, bicycle, printer and...

Read more about ViewForge

Features and specs

What each product offers, as listed by its team.

UMLet 5 features
ViewForge 9 features
  • Simplicity
    UMLet offers a simple and intuitive user interface that is easy to navigate, making it suitable for beginners.
  • Open Source
    Being an open-source tool, UMLet is free to use and has a community-driven development approach, allowing users to contribute to its improvement.
  • Quick Diagramming
    The tool allows for quick and efficient creation of UML diagrams with minimal fuss and immediate visual feedback.
  • Lightweight
    UMLet is a lightweight application that doesn't consume significant system resources, ensuring smooth performance even on less powerful machines.
  • Integration
    It integrates well with various development environments and offers a standalone version, as well as an Eclipse plugin.

Possible disadvantages

  • Limited Features
    UMLet lacks some advanced features found in other UML tools, which might be necessary for complex modeling tasks.
  • Manual Updates
    Since UMLet is open-source, it may not have regular updates or support services, leading to potential issues with bugs or compatibility over time.
  • Basic Graphics
    The graphical capabilities are quite basic compared to more sophisticated UML tools, which might be a limitation for users needing high-quality visuals.
  • Learning Curve for Customization
    While simple to use for basic tasks, customizing UMLet to suit specific needs can involve a learning curve, particularly for new users.
  • Limited Collaboration
    UMLet may not offer robust real-time collaboration features, which can be a drawback for teams working on shared UML diagrams.
  • Fitment Information
    Cascading Year/Make/Model fitment search, up to four levels
  • Vertical integration nobody else has
    8 built-in vertical templates, plus custom templates on paid tiers
  • Shopify Metaobjects
    Fitment stored as native Shopify metaobjects — your data survives uninstall
  • Smart Data Processing
    Smart Parse: extract fitment from existing product titles and descriptions, with confidence scoring
  • CSV Import/Export
    CSV import with fuzzy matching and a coverage dashboard
  • ACES / PIES
    ACES / PIES import and NHTSA VIN decoding
  • My Garage
    Saved-vehicle garage, compatibility table, and product-page fit notice
  • Context Aware Fitment Search
    Collection-level fitment assignment
  • No Obligations
    Free tier with no expiry, up to 50 products

Analysis

An editorial look at what each product does well and who it suits.

UMLet
ViewForge

Overall verdict

  • Overall, UMLet is considered a good option for users who prioritize ease of use and quick diagramming capabilities over extensive features. It may not have the advanced functionalities found in more comprehensive UML tools, but it serves well for basic to moderately complex diagramming tasks.

Why this product is good

  • UMLet is a popular open-source UML tool favored for its simplicity and speed. It allows users to draw UML diagrams quickly without the need for overly complex interfaces. Being a lightweight tool, it is particularly useful for those who need to create diagrams efficiently without a steep learning curve. Additionally, its open-source nature makes it highly customizable and adaptable to various needs.

Recommended for

  • Software developers in need of a fast, efficient diagramming tool.
  • Educators and students who require a simple and accessible tool for teaching or learning UML concepts.
  • Teams that prefer open-source solutions and the ability to customize their tools.
  • Individuals working on projects that do not require highly detailed or advanced UML diagrams.

No analysis of ViewForge yet.

Videos

Walkthroughs and reviews on video.

UMLet 2 videos + Add
ViewForge 1 video + Add

Tutorial for Open-Source UML Tool UMLet: Basic Use and Custom Elements

More videos

  • - How to draw CPM Network Diagram using UMLet

ViewForge: YMM Search & Filter

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
UMLet
ViewForge
100% 100%
0% 0%
0% 0%
100% 100%
100% 100%
0% 0%
0% 0%
100% 100%

Questions & Answers

As answered by people managing UMLet and ViewForge.

What makes your product unique?

ViewForge's answer:

Three things. (1) Data ownership: ViewForge writes fitment as Shopify metaobjects native to your store — most competitors store fitment in their own database. (2) 8 verticals out of the box: auto, motorcycle, tractor, marine, power equipment, bicycle, printer, electronics — most competitors are automotive-only. (3) Smart Parse: extract fitment automatically from your existing product titles and descriptions instead of re-typing everything.

Why should a person choose your product over its competitors?

ViewForge's answer:

Data ownership. Fitment lives in your Shopify metaobjects, so uninstalling does not take your compatibility data with it. Convermax, EasySearch and PartFinder all keep it in their own databases, and getting it back depends on their export tooling on the day you cancel.

Cost at the low end. The search widget, the compatibility table on the product page and the saved-vehicle garage are all on the free tier, up to 50 products, with no expiry. EasySearch puts the table and the garage behind its $75/month Premium plan. Convermax starts at $250/month.

Automotive and non-automotive coverage. Eight built-in templates, and fully custom templates from $19/month, for catalogs that do not decompose into Year/Make/Model at all.

How would you describe the primary audience of your product?

ViewForge's answer:

Shopify merchants whose customers need to know whether a part fits before they will buy it — and who do not have an engineer on staff to build that themselves.

Concretely: auto and truck parts retailers, powersports and motorcycle dealers, tractor and agricultural parts sellers, marine and outboard suppliers, small-engine and power equipment stores, bicycle and e-bike component shops, printer supply merchants, and electronics accessory sellers.

Catalog sizes run from a few dozen products on the free tier up into the tens of thousands; it is running in production on a catalog of roughly 40,000 SKUs. The common thread is not the industry — it is that "does this fit my thing" is the question deciding the sale.

What's the story behind your product?

ViewForge's answer:

ViewForge came out of agency work. Normal View was building for a parts retailer running roughly 12,000 SKUs who needed fitment search, and every app we evaluated stored the merchant's compatibility data in the vendor's own database.

That is a strange trade when you look at it directly. Fitment data is genuinely expensive to produce — it is weeks of work — and the merchant would not own the result. It would belong to whichever app happened to be installed that year.

Shopify metaobjects made a different answer possible: write fitment as native structured data inside the merchant's own store. The theme reads it, the Storefront API queries it, Admin GraphQL exports it, and it is still there after an uninstall. That decision is what the rest of the app is built around.

Everything else came from real catalogs rather than a roadmap. Eight verticals exist because a tractor catalog is not Year/Make/Model. Smart Parse exists because that retailer had already written fitment into 12,000 product titles, and nobody was ever going to retype them.

Which are the primary technologies used for building your product?

ViewForge's answer:

  • TypeScript
  • Shopify metaobjects, as the fitment data store
  • Shopify theme app extensions for the storefront components: fitment search, saved-vehicle garage, compatibility table, product-page fit notice
  • Shopify Storefront API, for querying fitment from the theme
  • Shopify Admin GraphQL API, for writing and exporting fitment records
  • NHTSA vehicle database, for VIN decoding
  • ACES and PIES XML parsing, for automotive catalog import

User comments

Share your experience with using UMLet and ViewForge. For example, how are they different and which one is better?

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Reviews and articles

External articles and on-site reviews we used to compare the two products.

UMLet no reviews yet
ViewForge no reviews yet

We have no reviews of ViewForge yet. Be the first one to post

Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

UMLet 1 mention
ViewForge 0 mentions
  • Is there any free handy tool to create UML diagrams ?
    I like Umlet. It is a GUI drawing tool, but is not overbearing. Since I like to abuse the details of UML graphical notation, Umlet lets me type anything in a class "box" I like. Source: over 3 years ago

Tracking ViewForge since Aug 2026.

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