Slack Logo Evolution: Comparing the Old and New Designs

What is the essential answer to my logo design question?

The old Slack logo most often refers to the 2013-era mark that preceded the systematic 2019 redesign: a compact multicolor symbol made from a two-by-two arrangement of rounded shapes. People also remember its earlier, looser hashtag-like form, but the logo that dominates archive searches and vector asset libraries is the pre-2019 four-color pictogram with the wordmark. This guide focuses on that observable version and compares it with the current Slack mark.

How did this logo develop, and what explains its design?

Slack began with a visual identity built around a tilted or loosely assembled hash symbol, a direct reference to channels in early chat tools. Over time the mark was tightened into a distinctive geometric pictogram: four rounded elements placed in a square, with two horizontal bars and two forms that read as speech-bubble tails or interlocking units. The result was an abstract representation of connected communication rather than a literal grid.

A major visual-system change arrived with the current identity. The most commonly cited goals were consistency, improved reproduction across screens and simplified application, though individuals often summarize the motivation slightly differently. The new symbol keeps the same basic DNA of clustered rounded shapes but normalizes the construction, removes competing color relationships and creates a more regular mark.

What meaningful differences separate the old and new versions?

The old and new Slack symbols read differently even though both use rounded geometric forms.

Criterion|Old Slack mark|New Slack mark

Overall feel|Playful, slightly irregular, closer to a hash|Cleaner, more controlled, more obviously systematic

Geometry|Four rounded units at varied visual angles|Simplified geometry with more regular alignment

Color|Multiple mid-tone colors on some backgrounds|Fewer, more deliberate color relationships

Reproduction|Could look busy at small sizes|Usually denser and more stable when reduced

Wordmark|Paired with a heavier wordmark|Uses a clearer wordmark relationship

The old logo’s irregularity is much of its personality: the shapes feel like overlapping conversation elements and can appear dynamic in larger applications. The tradeoff is control. At icon size, low contrast between some colored forms could reduce clarity. The new mark sacrifices some of that casual energy for predictability, which helps when the same symbol must work in browser tabs, app icons, documentation and third-party integrations.

If you are choosing a historical asset for reproduction, use the old mark where the brief calls for nostalgia or period-accurate branding. Use the current mark for present-day references, product documentation or any context where official visual consistency matters.

Vector-asset considerations

A filename containing a word such as vector, final or official does not guarantee usable vector geometry, and availability does not by itself grant permission to reuse the logo. Before editing or publishing a Slack logo asset, confirm the file contains actual paths rather than an embedded bitmap, and verify the applicable usage terms for the intended context.

Practical next step

For a historical comparison or archive-style design study, choose the old Slack symbol and preserve its original spacing and color behavior rather than trying to correct them. For a current brand need, work from the official modern mark and test it at the smallest required size before committing, especially where the logo will sit beside other product icons.