
Magnet Window Manager
Moom
yabai
BTT Remote
Homebrew
AppCleaner
Mizage Divvy
Window management app based on Spectacle, written in Swift.

Apollo.io
lemlist
SmartLead.ai
Reply.io
Mailshake
Hunter.io
ZoomInfo
Build your own infinitely scalable cold email outreach system with Instantly.

Which is more popular?
Based on our record, Rectangle seems to be a lot more popular than Instantly.ai. While we know about 480 links to Rectangle, we've tracked only 21 mentions of Instantly.ai.
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | rectangleapp.com | instantly.ai |
| Pricing | ||
| Company | — | Startup from the United States |
| Listed in |
What each product offers, as listed by its team.


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


Overall verdict
Why this product is good
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
Why this product is good
Recommended for
Walkthroughs and reviews on video.
SKYWALKER RECTANGLE TRAMPOLINE REVIEW!!!
More videos
Instantly Review - Creating A B2B Email Campaign With Instantly
More videos
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Rectangle and Instantly.ai. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


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...
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...
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...
Apollo now ships email warmup and inbox rotation too, so the difference comes down to volume economics. Instantly charges by emails sent and lets you connect unlimited inboxes, while Apollo charges by seat and credit.
What is the best MCP server for sales teams in 2026? toflow.ai is the most complete MCP server for sales in 2026, covering ICP search, account research, enrichment, sequence enrollment, and outreach across email,...
Instantly is stronger if email is your primary acquisition channel and you need deliverability infrastructure like inbox rotation, warm-up systems, and high-volume sending controls to scale cold email campaigns.
Recommendations tracked on public social media and blogs since March 2021.


Rectangle solved my macos window management annoyances. https://rectangleapp.com/ Not involved in dev of this, just a happy user. - Source: Hacker News / 2 months ago
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 / 7 months ago
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 / 7 months ago
I rebuilt my outreach this week after my reply rate tanked from 4% to <1%. Pulled fresh data from 5+ deliverability blogs (Autobound, MarketingProfs, HyperGen, Instantly), built a Python validator to enforce the new rules across 70+... - Source: dev.to / 6 months ago
Instantly was my final selection given its API was the most robust and well documented. It gave claude full access to campaigns, leads, and sequences while also being capable of sending webhooks on reply and unsubscribe events. - Source: dev.to / 10 months ago
Anywho, the old mailgun system was able to send emails immediately + had images in them. The recommendations we got were to remove ALL images, and instantly.ai has to delay a few minutes between email. So the emails get out slower and no... Source: about 3 years ago
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