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Onshape VS assertpy

Compare Onshape VS assertpy and see what are their differences

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Onshape logo Onshape

Onshape is the first full-cloud 3D CAD system. It runs in a web browser and on any mobile device.

assertpy logo assertpy

A straightforward assertion library for Python.
  • Onshape Landing page
    Landing page //
    2023-07-25
  • assertpy Landing page
    Landing page //
    2022-11-06

Onshape features and specs

  • Cloud-Based
    Onshape operates entirely in the cloud, allowing users to access their designs from anywhere with an internet connection. This eliminates the need for powerful local hardware and simplifies collaboration.
  • Collaboration
    The platform supports real-time collaboration, enabling multiple users to work on the same design simultaneously. This is particularly useful for teams spread across different locations.
  • Version Control
    Onshape offers built-in version control, providing a clear history of changes and the ability to revert to previous versions easily. This helps in maintaining design integrity over time.
  • No Software Installation
    As a web-based application, Onshape does not require any software installation or maintenance, reducing IT overhead and simplifying the setup process.
  • Integration and API
    Onshape supports a range of integrations with other software and provides an API for custom solutions, allowing seamless integration into existing workflows.
  • Cross-Platform Support
    The software works on various devices, including PCs, Macs, tablets, and smartphones, making it versatile and accessible for different user preferences.

Possible disadvantages of Onshape

  • Internet Dependence
    Since Onshape is cloud-based, a reliable internet connection is essential. Performance can be hindered by slow or unstable internet connections.
  • Subscription Model
    Onshape operates on a subscription-based pricing model, which may be costly in the long run compared to one-time purchase software licenses.
  • Data Security Concerns
    Storing designs in the cloud raises potential security issues. Users need to trust Onshape with their intellectual property and ensure that appropriate security measures are in place.
  • Learning Curve
    Users accustomed to traditional CAD software may face a learning curve when transitioning to Onshape due to its unique interface and functionalities.
  • Limited Offline Access
    Unlike traditional CAD software, Onshape does not offer robust offline capabilities, making it less ideal for use in environments without internet access.
  • Feature Parity
    While Onshape is continuously developing, it may lack some advanced features found in established CAD software, potentially limiting its use for highly specialized tasks.

assertpy features and specs

  • Fluent API
    Assertpy offers a fluent API that makes assertions more readable and expressive, enabling developers to write assertions in a natural language style that is easy to understand.
  • Chainable Assertions
    It allows for chainable assertions, enabling multiple checks to be performed in a single line of code, thereby reducing verbosity and enhancing clarity.
  • Comprehensive Assertion Methods
    The library provides a wide range of built-in assertion methods, catering to various types of data validations, such as checking for size, type, value, and more.
  • Extensibility
    Assertpy supports extending its functionality by defining custom assertions, allowing developers to tailor it to their specific needs.
  • Pythonic
    Designed with Pythonic principles in mind, Assertpy fits seamlessly into Python projects, enabling idiomatic and consistent code style.

Possible disadvantages of assertpy

  • Learning Curve
    Developers new to the library may encounter a learning curve due to the distinct approach of using fluent and chainable assertions as opposed to traditional methods.
  • Limited by Python Version
    The library may have limitations in terms of compatibility with older versions of Python, requiring users to ensure their environment is up-to-date.
  • Performance Overhead
    The additional abstraction layer introduced by a fluent interface might introduce some performance overhead, especially in performance-critical or resource-constrained environments.
  • Less Community Support
    Compared to more established testing libraries, Assertpy might have less community support and fewer resources available for resolving issues or getting help.
  • Dependency Management
    Using a third-party library introduces additional dependencies to manage, which could complicate project maintenance and compatibility.

Analysis of Onshape

Overall verdict

  • Onshape is a highly regarded computer-aided design (CAD) platform known for its collaborative features and cloud-based infrastructure.

Why this product is good

  • Onshape offers real-time collaboration tools, allowing multiple users to work on the same design simultaneously, similar to how Google Docs functions for text documents.
  • It is cloud-based, eliminating the need for large, powerful hardware or manual updates, making it accessible from any device with an internet connection.
  • The platform supports version control, ensuring that all changes are tracked and reversible, which minimizes the risk of lost work or errors.
  • Onshape integrates with numerous third-party apps and plug-in systems that extend its functionality, which is beneficial for more complex design workflows.
  • A robust set of simulation tools and features supports thorough testing and validation of designs before manufacturing.

Recommended for

  • Engineering teams looking for collaborative design tools.
  • Companies that need remote access to CAD software without investing in high-performance workstations.
  • Schools and educational programs that teach modern CAD techniques and collaborative design.
  • Innovators and product designers who require powerful simulation and configuration features.

Analysis of assertpy

Overall verdict

  • assertpy is a well-regarded, lightweight assertion library for Python that provides a fluent, chainable API for writing readable and expressive test assertions, making it a solid choice for improving test clarity.

Why this product is good

  • Offers a fluent, chainable assertion syntax that makes tests more readable and self-documenting
  • Comprehensive built-in assertions for strings, numbers, lists, dicts, files, dates, and more
  • Produces clear, descriptive failure messages that speed up debugging
  • Lightweight with minimal dependencies and easy to integrate into existing test suites
  • Framework-agnostic, working seamlessly with pytest, unittest, and other test runners
  • Actively maintained open-source project with good documentation and community support

Recommended for

  • Python developers who want more readable and expressive test assertions
  • Teams using pytest or unittest looking to enhance assertion clarity
  • Projects that value descriptive failure messages for faster debugging
  • Developers coming from fluent assertion libraries in other languages (like AssertJ or Chai)
  • QA engineers and testers writing maintainable, self-documenting test code

Onshape videos

The END of Onshape? Time to Start looking at Fusion 360?

More videos:

  • Review - 7 Reasons why Onshape is the best free CAD
  • Review - Fusion 360 Vs Onshape

assertpy videos

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Category Popularity

0-100% (relative to Onshape and assertpy)
3D
100 100%
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Testing
0 0%
100% 100
Architecture
100 100%
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Python
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Reviews

These are some of the external sources and on-site user reviews we've used to compare Onshape and assertpy

Onshape Reviews

Top 10 Cloud-Based PDM Tools in 2026 โ€“ Full Comparison
Limitation: Only works within the Onshape ecosystem. Not an option if youโ€™re using SOLIDWORKS or any desktop-based CAD tool.
Source: www.sibe.io

assertpy Reviews

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What are some alternatives?

When comparing Onshape and assertpy, you can also consider the following products

Blender - Blender is the open source, cross platform suite of tools for 3D creation.

grappa - grappa is an declarative, verbose, and expressive assertion library for Python.

Sculptris - Sculptris: Enter a world of digital art without barriers.

meshmixer - meshmixer is an experimental 3D modeling tool for making 3D mashups without too much hassle.

FreeCAD - An open-source parametric 3D modeler

SketchUp - 3D for Everyone