Mailcube project cover.


You'll love email again.

Published in 2016


  • Brand Design

  • Interface Design

  • User Testing

  • Design System

  • Illustration

  • Multimedia Design

  • Front-end Development

  • Back-end Development


  • Brand Identity

  • Website

  • Desktop App

An email client to give you more time and peace of mind, capable of turning email from foe to friend again. Even though many of us have declared email dead, it's up to all of us to breathe new life into it. Let's face it, you won't stop using email, so instead, why not work on the relationship?

The app.


With Mailcube you can browse your inbox using faces. Each face filters the next. You can add and reorder them to better suit your needs. This is one of the core elements that make Mailcube unique and an excellent tool for organizing your emails.

Mailcube project - organize with faces.

There are 5 types of faces. Messages, contacts, attachments, calendars and tags. These can all be rearranged to filter the next face. For example, if you have contacts on your left and select one of them, all of the faces on the right will only display content relative to that contact.

Mailcube icons.
Mailcube mobile screens.

In every email client, there are numerous permutations of the same information. Take email, for example. It can be read, unread, have an attachment, have a subject, be forwarded, etc. All of these possible combinations had to be designed to keep the user accurately in sync with his email workflow.

Mailcube components.

Cubes and contexts.

Notifications will only appear if the message fits inside the context. This way, you can easily separate your work life from your personal, allowing you to increase your productivity at work or dedicate time to your family without having work interfere. Drag messages to a cube to organize your mail. If the user adds a person or a tag, all their messages will fit inside that cube.

Mailcube cubes and contexts.

If you are inside your Home Context, you can have various cubes such as bills, vacations, purchases and within each of these cubes you will have a set of contacts and messages that are specific to that cube.

Mailcube sidebar behaviour.

Design on a grid.

When you create such a complex platform, sticking to an incremental grid is essential. In this case, we used multiples of 8-pixel structures, ensuring that every element we created would work alongside the others.

Mailcube grid on desktop.

“You guys also care about Mailcube, you are proactive, you guys discuss the product with us, you give us your insights and strategy.”

Ademar Aguiar

Co-Founder of Mailcube

Mailcube — Interview with Co-founder

An interview with Ademar Aguiar, one of the co-founders of Mailcube.

Style guide.


Mailcube is being developed for macOS, and its main purpose is not only to organize information but to display it. Hence, it was essential for the text to have unmatched legibility, clarity, and consistency. To achieve that we used Apple’s system font, San Francisco UI Text.

Mailcube typography.

Colour palette.

To focus the user's attention on the contents of each new email, it was essential to use neutral tones of black white and grey, using only red for notifications and blue for selected elements.

Mailcube colour pallete.


Constructed on a grid, Mailcube's icon family was created to solve every need of the email platform.

Mailcube iconset construction.


Creating a Brand.

The Mailcube brand was created with the junction of three elements. First, the cube, which is the foundation of the brand itself, then a clock that represents email time saving, plus the envelope that represents the product itself, email.

Mailcube logo construction.

Using an altered version of the Neris font, the Mailcube lettering lives harmoniously with the glyph, creating a balanced logotype that works very well in both digital and graphic platforms.

Mailcube logo colours.


The Landing Page was the last piece of the puzzle, as it was created as an online brochure of Mailcube’s core features, capturing the user’s attention and allowing them to download the app.

Mailcube landing page.

For the Contact section of the website, we found a creative way to display the form. We created a dynamic and interactive contact form in an email composer format of the app.

Mailcube contact section on desktop.

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