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Cal.com VS i3

Compare Cal.com VS i3 and see what are their differences

meetergo
GDPR-compliant meeting scheduling hosted in Germany. Booking pages, built-in video calls, lead routing, CRM and payments in one tool, with all data stored in Frankfurt and a data processing agreement (DPA/AVV) included. sponsored
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Cal.com logo Cal.com

Cal.com (formerly Calendso) is the open source Calendly alternative.

i3 logo i3

A dynamic tiling window manager designed for X11, inspired by wmii, and written in C.
  • Cal.com Landing page
    Landing page //
    2023-10-08
  • i3 Landing page
    Landing page //
    2021-09-19

Cal.com features and specs

  • Customizable
    Cal.com allows extensive customization to fit various branding and scheduling needs, which makes it adaptable for different types of users including businesses and individuals.
  • Open-source
    Being an open-source platform, Cal.com provides the flexibility for developers to modify and extend the software as per their specific needs, fostering a collaborative development environment.
  • Integrations
    Cal.com offers a wide range of integrations with other software tools like Google Calendar, Microsoft Outlook, and Zoom, enhancing its functionality and making it easier to fit into existing workflows.
  • User-friendly Interface
    Cal.com has an intuitive and clean interface that makes it easy for users of all technical skill levels to set up and manage their scheduling.
  • Privacy-focused
    Cal.com emphasizes data privacy, ensuring user information is handled securely, which is crucial for users who need to comply with regulations like GDPR.

Possible disadvantages of Cal.com

  • Learning Curve
    Although it is highly customizable, the plethora of options and features may result in a steeper learning curve for new users who are not familiar with such scheduling tools.
  • Limited Free Version
    The free version of Cal.com comes with limitations that may not be sufficient for growing businesses or advanced users who require more comprehensive features.
  • Dependency on Integrations
    Cal.com's effectiveness heavily depends on its integrations. Without these integrations, some users might find the tool less useful or incomplete, especially if their primary tools are not supported.
  • Support
    While open-source has many benefits, it may also mean that immediate, personalized support could be limited compared to fully commercial solutions. This might pose a challenge for users needing quick resolutions.
  • Performance
    As an open-source platform, the performance might vary depending on how it is hosted and managed. Suboptimal configurations could lead to slower performance or downtimes.

i3 features and specs

  • Efficient Window Management
    i3 allows for highly efficient window management using a tree data structure, making it easy to snap windows into grids and manage multiple applications simultaneously.
  • Lightweight
    i3 is deliberately simplistic and lightweight, which allows it to run efficiently on older hardware or systems with limited resources.
  • Customizability
    Users can extensively customize keybindings and behavior through a plain text configuration file. This allows for a personalized workflow.
  • Keyboard-Centric
    i3 is designed to be used primarily through keyboard shortcuts, which can lead to increased productivity for advanced users.
  • Scriptability
    i3 supports various scripting languages through its IPC (Inter-process Communication) interface, enabling automation of complex workflows.
  • Community and Documentation
    i3 has strong community support and extensive documentation, making it easier for new users to learn and troubleshoot issues.

Possible disadvantages of i3

  • Steep Learning Curve
    New users may find i3 difficult to learn and configure, especially if they are accustomed to traditional desktop environments.
  • Lack of GUI Configuration Tools
    i3 relies heavily on manual edits to text files for configuration, lacking user-friendly graphical interfaces for setup and customization.
  • Limited Out-of-the-Box Features
    i3 does not come with many built-in features available in more comprehensive desktop environments, such as app launchers or system tray support, requiring additional setups.
  • Compatibility Issues
    Some applications may not play well with tiling window managers like i3, requiring workarounds or alternative software choices.
  • Minimal Default Appearance
    Without customization, i3 offers a very minimalistic and barebones visual experience, which may not be appealing to all users.

Analysis of Cal.com

Overall verdict

  • Cal.com is generally considered a good option for scheduling and calendar management.

Why this product is good

  • Cal.com is praised for its open-source nature, allowing for greater customization and integration flexibility. It offers a user-friendly interface and supports various calendar integrations, making it a versatile tool for individuals and businesses alike.

Recommended for

  • Freelancers who need a simple yet effective scheduling tool.
  • Small businesses looking for a customizable scheduling solution.
  • Developers who appreciate open-source software and need a tool they can modify.
  • Businesses seeking a platform that can integrate with existing tools and workflows.

Analysis of i3

Overall verdict

  • Yes, i3 is considered a very good window manager for users who appreciate its minimalist and efficient approach. Its lightweight design keeps resource usage low, which can improve performance on less powerful machines.

Why this product is good

  • i3wm is known for its simplicity, speed, and efficient use of screen space, making it a popular choice among power users and developers who prefer a keyboard-driven workspace. Its tiling feature allows for the seamless organization of multiple windows, enhancing productivity and multitasking. Furthermore, it is highly customizable, allowing users to tailor their workspace to their specific needs.

Recommended for

    i3wm is recommended for advanced users, developers, and anyone who prefers a keyboard-centric interface. It is ideal for users who like to customize their environment extensively and are comfortable with configuring software via text files. New users with a willingness to learn may also find it rewarding.

Cal.com videos

+ Add

What can you do with Cal? | Cal.com Version 1.1 Launch | 10 new languages

More videos:

  • Review - Cal.com Version 1.0 Launch Event

i3 videos

+ Add

30k Miles with the BMW i3 - End of Lease Review

More videos:

  • Review - 2016 BMW i3 - Review and Road Test
  • Review - 2018 BMW i3s Range Extender (REx) Review - The Future Of Cars?
  • Demo - Gaming With Intel's Core i3 9100F - The First Turbo Boosted Desktop i3
  • Review - The best EV for the money? Used BMW i3 Review

Category Popularity

0-100% (relative to Cal.com and i3)

Cal.com

i3

Appointments and Scheduling
100 100%
Appointments and Scheduling
0% 0
Window Manager
0 0%
Window Manager
100% 100
Calendar And Scheduling
100 100%
Calendar And Scheduling
0% 0
Linux
0 0%
Linux
100% 100

User comments

Share your experience with using Cal.com and i3. For example, how are they different and which one is better?
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Reviews

These are some of the external sources and on-site user reviews we've used to compare Cal.com and i3

Cal.com Reviews

Acuity Scheduling alternatives for businesses outgrowing it
The honest read: if you're leaving Acuity because your business outgrew simple scheduling — you need deposits, add-ons, multiple staff and locations, and ideally a booking site you own — Opencals is built for exactly that transition, and pay-as-you-go means it costs nothing until you're earning. If you're leaving for a narrower reason, match it precisely: SimplyBook.me for...
Source: opencals.com
I've poked around a while ago at some Calendly alternatives (specifically was lo... | Hacker News
I tried using https://cal.com for a bit but ended up just switching over to https://zcal.co and it has been great so far. All these other scheduling tools end up trying to do too much and always seem to end up a bit clunky and charge absurd amounts for it
Source: news.ycombinator.com

i3 Reviews

Top 13 Best Tiling Window Managers For Linux In 2022
Sway is a tiling Wayland i3-compatible window manager that dynamically arranges app windows to rationally maximise desktop space. It is free, open-source, and lightweight. By default, it arranges windows in a grid and supports practically all of the i3 commands.
Source: www.hubtech.org
Top 10 Best Desktop Environments in 2020
i3-wm is one of my most loved standalone window managers, qualifying it to easily fit under the desktop environment list! The configuration is just very easy, and you can change everything that you see on screen. This includes what information you see on the bottom panel, how windows behave, and keyboard shortcuts to move, align, and set up windows on the screen.
Source: www.journaldev.com
13 Best Tiling Window Managers for Linux
Sway is a free, open-source, and lightweight tiling Wayland i3-compatible window manager that automatically arranges app windows to logically maximize desktop space. It arranges windows into a grid by default and supports almost all the commands included in i3.
Source: www.tecmint.com
5 Great Tiling Window Managers for Linux
I begun testing i3 just this week. I was always fascinated by the Tiling WM’s as they seem really light on system resources and functional. To my surprise , although i3 is really easy to customize, and works really well (at least for my needs) , I found that it isn’t really that lightweight. I had Mate desktop environment use the same amount of RAM. Maybe I was mislead to...
Source: www.maketecheasier.com

Social recommendations and mentions

Based on our record, i3 should be more popular than Cal.com. It has been mentiond 92 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.

Cal.com mentions (60)

  • "You Wouldn’t Steal a DIV": How I Built My Portfolio
    Then for the component library, I was really into coss ui. I stumbled upon it randomly one day and loved it so much. My Nathan's AI project already had a UI heavily inspired by cal.com: send button, message suggestions... So when I saw they had a shadcn/ui library with that kind of style, it was perfect for what I needed. - Source: dev.to / 6 months ago
  • AI Almost Sold Me a Subscription I Didn't Need
    I keep coming back to what would have happened if I didn't have a strong technical understanding of how calendar technology works — the difference between local and cloud calendars, what an ICS feed is, why enterprise auth blocks third-party integrations. If this was many years ago before I gained all this experience, I would have stopped at the first confident answer from my search tool, installed one of those... - Source: dev.to / 6 months ago
  • Introducing Quackback: Open-Source Feedback Platform with a Built-in MCP Server
    Plausible brought open source to web analytics. Cal.com did it for scheduling. Formbricks did it for surveys. PostHog did it for product analytics. Quackback does it for feedback collection. - Source: dev.to / 7 months ago
  • 🤝 Learn Front-End by Doing: Contribute to Cal.com's Open Source...🚀
    In this tutorial, we'll be focusing on Cal.com:. - Source: dev.to / about 1 year ago
  • 5 Side Project Ideas for Developers to Monetize as Micro-SaaS in 2025
    Take Cal.com (https://cal.com/), formerly known as Calendso. It started as an open source alternative to Calendly which offers a free, self-hostable version for users. - Source: dev.to / over 1 year ago
View more

i3 mentions (92)

  • Why I traded my custom "Opinionated Linux" for Omarchy
    I've been using Omarchy as my main setup since June 26, 2025, the day DHH released the first version. Before that I had my own custom Opinionated Linux, mclovin-ARCHived: an Arch + i3wm installer set up exactly the way I liked. It was total control over the OS: me deciding what goes in, keeping every piece (i3wm, polybar, picom, kitty, dotfiles) up to date and making sure they all talked to each other for the... - Source: dev.to / 4 months ago
  • Omarcacca
    Then few years back, in 2015, I got shown i3wm and used it on my ubuntu-netinstall until 2020, then I switched to Budgie and my personal laptop has been using that ever since. - Source: dev.to / 7 months ago
  • Automatic Visual Feedback for System Volume Change in I3wm via Dunst
    I switched to the i3 tiling based window manager. Because it's a whole different environment and thinking, it was very different from what I was used to. The volume buttons were working on my keyboard, but I didn't get any visual feedback. Furthermore, the volume percentage could go down below zero and increase up to more than hundread percent. There were times when I was confused why the keys stopped working, but... - Source: dev.to / about 2 years ago
  • "We understand" ;)
    This is partially why I use tools like i3 (/ sway). I like the tool; it works extremely well for me; the design has stayed the same for 20 years; there's no profit motive to come along and fuck everything up. It just works. It is boring in the best way possible. Source: over 2 years ago
  • what machines have you used for development, and what do you prefer?
    I use MacBook Pro (Retina, 15-inch, Mid-2014) with Manjaro as OS using i3 as a window manager. It isn't perfect, but I'm thrilled with it. I have been a Mac OS user for the last 15 years and wouldn't change what I have now for a Mac OS because I don't need more than what I'm using for development. Source: about 3 years ago
View more

What are some alternatives?

When comparing Cal.com and i3, you can also consider the following products

Calendly - Say goodbye to phone and email tag for finding the perfect meeting time with Calendly. It's 100% free, super easy to use and you'll love our customer service.

Sway - Sway is a drop-in replacement for the i3 window manager, but for Wayland instead of X11.

Acuity Scheduling - Automate your client bookings, cancellations, reminders & payments using the worlds friendliest online scheduling software.

dwm - dwm is a dynamic window manager for X. It manages windows in tiled, monocle and floating layouts. All of the layouts can be applied dynamically, optimising the environment for the application in use and the task performed.

TidyCal - Optimize your schedule with custom booking pages and calendar integrations

Openbox - Openbox is a highly configurable, next generation window manager with extensive standards support.

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