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Rectangle VS Bosun.dev

Compare Rectangle VS Bosun.dev and see what are their differences

Rectangle

Window management app based on Spectacle, written in Swift.

Rating
0 reviews
Pricing
Open source
Alternatives Is it good?
Bosun.dev

See what's exposed. The macOS menu bar app that shows every open port, tunnel, VPN, and container — before it's a problem.

Rating
0 reviews
Pricing
Paid Free trial $12.99 / One-off (Solo, 1 computer)
Alternatives Is it good?
Status.io
Status.io is a hosted status page platform for incident communication and uptime monitoring. Keep your customers informed with real-time status updates, maintenance alerts, and transparent system notifications. sponsored

Which is more popular?

Based on our record, Rectangle seems to be more popular. It has been mentioned 480 times since March 2021.

social mentions
480 vs 0
Mac Tools popularity
100% vs 0%
alternatives listed
240+ vs 3

Base details

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

Rectangle
Bosun.dev
Website rectangleapp.com bosun.dev
Pricing
Open source
Paid Free trial $12.99 / One-off (Solo, 1 computer) Official pricing
Listed in
Mac Tools Window Manager Mac Developer Tools +1
Developer Tools Mac Tools Web Development Tools Productivity Mac Monitoring Tools +3

About Rectangle and Bosun.dev

In their own words, as submitted to SaaSHub.

Rectangle
Bosun.dev

No description of Rectangle yet.

Bosun is a native macOS menu bar app that shows you everything your Mac has open to the network, right when you need it, with no Terminal digging required. It runs lsof in the background to list every listening port, then goes further than a simple port scanner: it maps each port to the process...

Read more about Bosun.dev

Features and specs

What each product offers, as listed by its team.

Rectangle 5 features
Bosun.dev 14 features
  • 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

  • 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.
  • Port Scanning
    Detects all listening TCP/UDP ports in real time via lsof, no manual terminal digging.
  • One Click Kill
    Terminate any process by port with SIGTERM→SIGKILL fallback; Kill All with confirmation.
  • Menubar Native App
    Lives in the macOS menu bar, zero dock clutter, instant popover access.
  • Port Range Filtering
    Monitor custom ranges (e.g. 3000-9999) and exclude noisy system ports.
  • Tunnel Detection
    Auto-detects ngrok and Cloudflare tunnels (named + quick), shows public URL inline.
  • Docker Awareness
    Maps docker-proxy PIDs to container name + image instead of generic process names.
  • VPN Status Indicator
    Shows active native macOS VPN connections (IKEv2/L2TP/IPSec) at a glance.
  • SSH Tunnel Detection
    Identifies -L port-forwarding rules and displays the remote target.
  • Port History
    Logs first-seen/last-seen per port with configurable retention.
  • Process Info Panel
    CPU, memory, uptime, full command args per process on expand.
  • Global hotkey
    Configurable shortcut to toggle the popover from anywhere.
  • New Port Notifications
    System alert when a new port opens (skips the first scan).
  • Copy and Open
    One click to copy localhost:PORT or open it in the browser.
  • Auto updates
    Sparkle-based updates, EdDSA-signed, no manual reinstalls.

Analysis

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

Rectangle
Bosun.dev

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.

Overall verdict

  • Bosun is a solid, mature open-source monitoring and alerting system built by Stack Exchange, offering powerful and flexible alert definitions, but it has a steep learning curve and has seen slower development activity in recent years compared to newer observability tools.

Why this product is good

  • Highly expressive alert scripting language allowing complex, conditional alerting logic beyond simple threshold checks
  • Built-in support for reducing alert fatigue through smart notification handling, silencing, and templating of alert messages
  • Native integrations with Graphite, OpenTSDB, Elasticsearch, and other time-series backends
  • Includes a built-in expression testing and graphing UI to validate alert rules before deploying them
  • Proven at scale, having been developed and battle-tested internally at Stack Exchange/Stack Overflow
  • Open source and self-hostable, giving full control over data and infrastructure

Recommended for

  • Organizations already using OpenTSDB or Graphite as their metrics backend
  • Teams that need highly customized, condition-based alerting rules rather than simple threshold alerts
  • Engineers comfortable writing and maintaining alert logic in a domain-specific expression language
  • Companies wanting a self-hosted, open-source alternative to commercial alerting platforms
  • Ops teams who value alert deduplication and templating to reduce noise and false positives

Videos

Walkthroughs and reviews on video.

Rectangle 3 videos + Add
Bosun.dev 0 videos + Add

SKYWALKER RECTANGLE TRAMPOLINE REVIEW!!!

More videos

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

No Bosun.dev videos yet. You could help us improve this page by suggesting one.

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
Rectangle
Bosun.dev
100% 100%
Mac Tools
0% 0%
0% 0%
Developer Tools
100% 100%
100% 100%
Window Manager
0% 0%
0% 0%
Productivity
100% 100%

Questions & Answers

As answered by people managing Rectangle and Bosun.dev.

Which are the primary technologies used for building your product?

Bosun.dev's answer:

Swift 5.9+, SwiftUI + AppKit (NSStatusItem), lsof for port scanning, Sparkle for auto-updates, Polar for licensing/payments. No Electron, no third-party dependencies beyond Sparkle.

How would you describe the primary audience of your product?

Bosun.dev's answer:

Developers who run local dev servers, Docker containers, and tunnels (ngrok/Cloudflare) daily and need instant visibility into what's bound to which port, without opening Terminal or Activity Monitor.

What makes your product unique?

Bosun.dev's answer:

Bosun is the only menu bar tool that unifies port scanning with network context: it maps ngrok/Cloudflare tunnels, native VPN status, Docker containers, and SSH -L forwards to the process actually holding each port, then lets you kill it in one click. Most alternatives only do one of those things.

Why should a person choose your product over its competitors?

Bosun.dev's answer:

iStat Menus monitors the system but not tunnels or containers. Little Snitch blocks connections but doesn't show you what's already running. Seeports comes closest (port scanning for Docker/K8s/dev servers) but lacks tunnel and VPN detection. Bosun covers all of it natively, with zero third-party dependencies, no Electron overhead, and a one-time price instead of a subscription.

What's the story behind your product?

Bosun.dev's answer:

Built out of a personal need: constantly losing track of which local dev server, Docker container, or forgotten tunnel was holding a port, and resorting to lsof in Terminal every time. Bosun turns that into a native, always-visible menu bar view.

User comments

Share your experience with using Rectangle and Bosun.dev. 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.

Rectangle no reviews yet
Bosun.dev no reviews yet
  • Best 6 Mac Window Managers
    mackeeper.com · Sep 2023

    Rectangle shows that you don’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...

  • Top 6 Window Manager Apps for Mac
    www.maketecheasier.com · May 2023

    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 – such as BetterSnapTool, Magnet, and...

  • The 6 Best Mac Window Management Tools
    www.makeuseof.com · Apr 2023

    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...

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

Social recommendations and mentions

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

Rectangle 480 mentions
Bosun.dev 0 mentions
  • Apple introduces M6 and M5 Ultra for a big leap in performance and AI compute
    Rectangle solved my macos window management annoyances. https://rectangleapp.com/ Not involved in dev of this, just a happy user. - Source: Hacker News / about 2 months ago
  • 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... - Source: Hacker News / 6 months ago
  • Native Instant Space Switching on macOS
    Every macOS user uses Rectangle.app — https://rectangleapp.com The ones who don't use it is because they don’t know it exists. - Source: Hacker News / 6 months ago

View more

Tracking Bosun.dev since Jul 2026.

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