GrandPerspective VS Quantopian

• Visualization
  GrandPerspective provides a visual representation of disk usage, allowing users to easily identify large files and folders at a glance through a treemap display.
• Open Source
  The software is open source, meaning it is free to use and its source code is accessible for modification and improvement by the community.
• User-Friendly
  The interface is simple and intuitive, making it easy for users of all levels of technical expertise to navigate and understand their disk usage.
• Customizable
  Users can customize the treemap view, including color schemes and block sizes, to better suit their preferences and needs.

Possible disadvantages

• Mac-Only
  GrandPerspective is available only for macOS, limiting its usage to Apple users and excluding those on Windows or Linux platforms.
• Basic Features
  While it provides excellent visualization, GrandPerspective lacks advanced features that are available in some paid disk usage analyzers.
• Performance Issues
  The application can struggle with performance when scanning particularly large disks or volumes, leading to longer loading times and potential crashes.
• Occasional Bugs
  As with many open-source projects, users may encounter occasional bugs or glitches that can impact the user experience.

• Community Collaboration
  Quantopian provided a platform for users to share and collaborate on trading algorithms, enabling users to learn from each other and improve their strategies.
• Access to Data
  Quantopian offered access to a wide range of financial data sets, which allowed users to develop and back-test their algorithms using historical data.
• Comprehensive Development Environment
  It featured an integrated development environment (IDE) with tools for coding, testing, and back-testing trading strategies in Python, which was user-friendly and powerful.
• Educational Resources
  Quantopian provided various educational resources, including lectures, tutorials, and a supportive community forum, which were beneficial for both beginners and experienced traders.
• Competition and Incentives
  Quantopian organized contests that incentivized users to develop successful trading algorithms, with the potential to receive a live trading allocation from the company.

Possible disadvantages

• Shutting Down Services
  Quantopian shut down its retail offering in 2020, which meant that users could no longer use their platform for developing and testing new algorithms.
• Limited Live Trading Options
  Users found limited options for deploying their strategies into live trading. Quantopian allowed this only for algorithms selected for allocation, which reduced accessibility for many users.
• Dependence on Platform
  Users who developed algorithms on Quantopian's platform were heavily dependent on it, and when it shut down, they had to transition to other platforms, which could be challenging.
• Resource Limitations
  There were computational and resource limitations for users, which could restrict the complexity of the algorithms and back-testing users could perform without additional infrastructure.
• Portfolio Selection Process
  The selection process for having algorithms licenced for live trading allocation was competitive and not transparent to many users, which could lead to frustration.

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Algorithmic Trading with Python and Quantopian p. 1

More videos

• DaisyDisk Alternatives: Free Disk Analyzers We've Actually Tested
  dissectmac.com · Feb 2026

  If you've been on Mac for 10+ years, you probably know GrandPerspective. It was the original treemap visualizer, and it's completely free under GPL.

• What is Disk Inventory X and Its Top Alternatives
  www.imymac.com · Feb 2022

  The main drawback of this tool is that it presents a lot of information which can be quite overwhelming to the user. It will not display an overview of your disks which contradicts its name. In summary,...

• What Is WinDirStat and Its Top Mac Alternatives
  www.imymac.com · Jan 2022

  GrandPerspective’s menu/toolbar contains all of the options the app offers. You can configure its settings easily even if you are a newbie Mac user. You just need to choose a folder you want to analyze. The app will...

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

• Don't let your Mac's storage fill up

  Don't pay $10 for what you can get for free: https://github.com/RobinNaumann/disko, https://grandperspectiv.sourceforge.net/, https://www.derlien.com/, etc… Otherwise, this is good advice. My cousin, who isn't particularly computer... - Source: Hacker News / 4 months ago

• Anthropic Cowork feature creates 10GB VM bundle on macOS without warning

  I simply run GrandPerspective (GUI app, https://grandperspectiv.sourceforge.net/), or dust (terminal app, https://github.com/bootandy/dust), to give me an idea of what is going on with disk usage. - Source: Hacker News / 6 months ago

• Anthropic Cowork feature creates 10GB VM bundle on macOS without warning

  I’d recommend GrandPerspective:[1] it’s really good at displaying this sort of thing, has been around for over two decades, and the developer has managed to keep it to <5MB which is perfect when you’re running very low on space. [1]... - Source: Hacker News / 6 months ago

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Tracking Quantopian since Mar 2021.