Software Alternatives, Accelerators & Startups

Rectangle VS Greylisting.org

Compare Rectangle VS Greylisting.org and see what are their differences

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.

Rectangle logo Rectangle

Window management app based on Spectacle, written in Swift.

Greylisting.org logo Greylisting.org

Boost email deliverability with an AI-powered greylisting platform. Intelligently manage whitelists, greylists, and blacklists to ensure your messages always reach the inbox.
  • Rectangle Landing page
    Landing page //
    2023-05-20
  • Greylisting.org Greylisting homepage
    Greylisting homepage //
    2025-09-12
  • Greylisting.org Greylisting email filtering
    Greylisting email filtering //
    2025-09-12

Rectangle features and specs

  • Ease of Use
    Rectangle offers an intuitive user interface that makes window management straightforward and user-friendly.
  • Customizable Shortcuts
    Users can easily configure keyboard shortcuts to better suit their workflow, making window management faster and more efficient.
  • Free
    Rectangle is available for free, making it accessible to anyone without the need for a financial investment.
  • Frequent Updates
    The app receives regular updates, introducing new features and ensuring compatibility with the latest macOS versions.
  • Lightweight
    Rectangle is a lightweight application that doesn't consume many system resources, ensuring smooth performance even on older Macs.

Possible disadvantages of Rectangle

  • Limited Advanced Features
    Rectangle lacks some of the more advanced features found in paid window management applications, such as multiple monitor support and more complex window arrangements.
  • MacOS Only
    Rectangle is only available for macOS, so users of other operating systems are unable to take advantage of its features.
  • Occasional Bugs
    Some users report occasional bugs or unpredictable behavior, which might require troubleshooting or waiting for a future update.
  • Learning Curve for Shortcuts
    While customizable shortcuts are a benefit, there is an initial learning curve for users to memorize and effectively use these shortcuts.
  • Basic Aesthetic
    The app's design and aesthetic are quite basic, lacking the polish and visual appeal found in some other similar tools.

Greylisting.org features and specs

  • Improved Spam Filtering
    Greylisting.org helps reduce spam emails by temporarily rejecting emails from unknown senders and requiring them to try again after a short delay. This method effectively filters out many automated spam messages.
  • Resource Efficiency
    The greylisting process reduces the amount of processing power needed to filter spam because it takes advantage of the retry mechanism that legitimate mail servers use, thus minimizing unnecessary resource consumption.
  • Easy Implementation
    Integrating greylisting into an existing email server setup is generally straightforward and can be done with minimal configuration, making it an attractive option for administrators looking to enhance email security.
  • Reduced False Positives
    Unlike other spam filtering methods that rely heavily on content analysis, greylisting reduces the number of legitimate emails marked as spam because it primarily focuses on the behavior of the sending server.

Possible disadvantages of Greylisting.org

  • Delivery Delays
    One major drawback of greylisting is the potential delay in email delivery. Since emails are temporarily deferred, legitimate emails may take longer to be delivered to the recipient.
  • Compatibility Issues
    Some legitimate email servers may not retry sending emails as expected, especially if they are configured non-standardly, leading to potential problems with email receipt.
  • Administrative Overhead
    Although greylisting can be easy to implement, maintaining and monitoring the system to ensure it works effectively and doesn't block legitimate email can require additional administrative effort.
  • Not Foolproof
    Sophisticated spam services can adapt to greylisting by mimicking legitimate server behavior, and thus greylisting should be used in conjunction with other spam filtering mechanisms for better security.

Analysis of Rectangle

Overall verdict

  • Overall, Rectangle is highly regarded for its ease of use, extensive customization options, and the fact that it is free and open-source. It provides essential functionality without unnecessary complexity, making it suitable for both casual users and power users who need efficient window management.

Why this product is good

  • Rectangle is a popular window management tool for macOS, known for its simplicity and ease of use. It allows users to efficiently organize and resize application windows using customizable keyboard shortcuts or by dragging windows into pre-defined areas of the screen. This can enhance productivity by minimizing the time spent arranging windows and improving multitasking capabilities.

Recommended for

    Rectangle is recommended for macOS users looking for a straightforward, lightweight solution to manage application windows. It is particularly beneficial for those who frequently work with multiple applications at once, including developers, designers, and anyone who values a tidy and organized desktop environment.

Rectangle videos

SKYWALKER RECTANGLE TRAMPOLINE REVIEW!!!

More videos:

  • Review - Skywalker Rectangle Trampoline Review #1
  • Review - Marvin Malton 160 Rectangle Flying Hour Watch Review

Greylisting.org videos

No Greylisting.org videos yet. You could help us improve this page by suggesting one.

Add video

Category Popularity

0-100% (relative to Rectangle and Greylisting.org)
Mac Tools
100 100%
0% 0
Anti-Spam
0 0%
100% 100
Window Manager
100 100%
0% 0
Email
0 0%
100% 100

User comments

Share your experience with using Rectangle and Greylisting.org. For example, how are they different and which one is better?
Log in or Post with

Reviews

These are some of the external sources and on-site user reviews we've used to compare Rectangle and Greylisting.org

Rectangle Reviews

Best 6 Mac Window Managers
Rectangle shows that you donโ€™t need to dip into your bank account to get window resizer tools. This free Mac window manager lets you manage multiple windows using keyboard shortcuts, menu options, or by dragging and dropping. Just like Magnet, you can split your screen up into quarters, thirds, or halves.
Source: mackeeper.com
Top 6 Window Manager Apps for Mac
Most window manager apps for Mac support multiple monitors. They can help you move windows between screens and create custom layouts for each monitor. Many window manager apps โ€“ such as BetterSnapTool, Magnet, and Rectangle โ€“ offer this functionality.
The 6 Best Mac Window Management Tools
However, it might take some time for you to get used to the shortcuts in the Rectangle app since there are many. Furthermore, you can also add some of your apps to exceptions if you want to keep them away from Rectangle's shortcuts.

Greylisting.org Reviews

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

Social recommendations and mentions

Based on our record, Rectangle seems to be more popular. It has been mentiond 479 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Rectangle mentions (479)

  • Ubuntu 26.04 LTS Released
    As a both old Linux and now decade user of MacOS, after I got used to no middle-click paste and no focus-follows-mouse: 1. Keyboard shortcuts are Emacs, Ctrl-A: start of line, E: end of line, K: kill selected or to end of line, Y to paste, etc. https://support.apple.com/en-au/102650#text 2. Karabiner elements (FOSS) fixes keyboard mappings outside of the Settings: https://karabiner-elements.pqrs.org/ 3. I have the... - Source: Hacker News / 2 months ago
  • Native Instant Space Switching on macOS
    Every macOS user uses Rectangle.app โ€” https://rectangleapp.com The ones who don't use it is because they donโ€™t know it exists. - Source: Hacker News / 3 months ago
  • Native Instant Space Switching on macOS
    I use https://rectangleapp.com/ and enjoy it. I have shortcuts to move windows to the left/right half of the screen, and cycle between monitors. This, combined with native cmd+tab and cmd+` is enough for me. - Source: Hacker News / 3 months ago
  • Make macOS consistently bad (unironically)
    Rectangle [1] is pretty much essential for me because of this. I use only a few keypresses (maximize window, move to one of the halves of the screen horizontally) but that is enough. My mouse very rately interacts with the borders of any window, or those buttons. I had to click on the green one that you mentioned in order to see what it did (yuck). [1] https://rectangleapp.com/. - Source: Hacker News / 3 months ago
  • Make macOS consistently bad (unironically)
    I use Rectangle [1] for window management. I only use three shortcuts: full screen, left half of the screen, and right half of the screen. My editors and chrome are always running in one of these modes. But for other apps like Messages, Notes, Music, etc - yeah I don't usually expand them to full screen. [1] https://rectangleapp.com/. - Source: Hacker News / 3 months ago
View more

Greylisting.org mentions (0)

We have not tracked any mentions of Greylisting.org yet. Tracking of Greylisting.org recommendations started around Sep 2025.

What are some alternatives?

When comparing Rectangle and Greylisting.org, you can also consider the following products

yabai - A tiling window manager for macOS based on binary space partitioning

Twilio - Brings voice and messaging to your web and mobile applications.

Magnet Window Manager - Magnet Developers

SpamTitan - Comprehensive Email Protection. 99.99% Spam Detection. Blocks phishing, viruses, malware and other email threats.

BTT Remote - A remote control for you Mac, using your iPhone or iPad

MailChannels - MailChannels protects companies against abusive email traffic. Used by 650+ service providers around the world.