SigmaOS is a radical new browser for organizing tabs

SigmaOS isn’t the primary startup to strive reinventing the online browser, but it surely may be the weirdest.

In contrast to most desktop net browsers, this new Mac app has no horizontal tab bar, no bookmarks, and just one browser window. Some components of its format, comparable to its new tab button, appear intentionally misplaced, and it’s lacking some options you may think about table-stakes, like extension help. It additionally prices $10 per thirty days after a two-week trial, whereas most browsers are free.

So why did SigmaOS turn into the most-upvoted entry on ProductHunt last week? Maybe it’s as a result of we’re always overwhelmed by our browser tabs and are determined for new methods to cope with them. Mahyad Ghassemi, SigmaOS’s cofounder and CEO, has said that he grew to become pissed off by the dearth of group options in conventional net browsers, and determined to develop a radical different.

That’s why SigmaOS forces customers to think about browser tabs as duties and the browser itself as a to-do checklist. Whereas it has some blind spots and blemishes in its early days, it makes a convincing argument that the best way we work on the internet wants a rethink.


Unusual by design

As an alternative of home windows, SigmaOS has “Workspaces,” showing as a row of customizable icons alongside the left aspect of the display, and every has its personal vertical stack of tabs subsequent to it. Each tab should belong to a Workspace, and the verticality is non-negotiable. To make up for its lack of a number of home windows, SigmaOS presents one concession for split-screen looking: You possibly can click on a button or press Cmd-Proper to slip out a second web page in a side-by-side view.

[Screenshot: courtesy of SigmaOS]

The purpose is make group really feel necessary. Whereas utilizing SigmaOS myself, I made a decision to arrange separate Workspaces for every of my writing assignments, together with a “Procrastination” house for all the private issues I used to be studying or trying up. As a result of SigmaOS can solely show one Workspace’s tabs at a time, it inspired me to remain centered and to pay extra consideration to how I used to be grouping issues collectively.

To that finish, SigmaOS additionally has a good means of dealing with hyperlinks you click on on in different apps, comparable to Apple Mail or Slack. Whereas most browsers simply load these tabs in an present window, SigmaOS provides them to a separate Workspace known as “Shared with me.” That means, random articles from your folks or colleagues don’t muddle up your present Workspaces.

[Screenshots: courtesy of SigmaOS]

SigmaOS is obsessive about keyboard shortcuts as properly, to the purpose that it makes some frequent capabilities cumbersome to perform in any other case. The new tab web page lives within the top-right nook of the display, away from the tab row the place you’d anticipate it, and shutting a tab together with your cursor requires right-clicking and choosing “Mark as Executed.”

Naturally, you’ll pressure your self to make use of the keyboard as a substitute: Hitting backslash opens a new web page immediate, the place you may sort an tackle, search the online, or change to a tab that’s already open. “D” closes a tab (or marks it as “Executed,” in SigmaOS parlance), “H” snoozes a web page for later, “M” strikes it to a different Workspace, and “S” shares it through Messages, Mail, or Twitter. For those who ever overlook a command, hitting Cmd-Ok brings up a search field for executing duties and viewing their corresponding shortcuts.

A piece in progress

As a rethink of methods to work in your net browser, SigmaOS makes a lot of sense. However even if you’re adhering to its inflexible construction, the browser generally will get in its personal means.

For example, there’s no strategy to bulk-select a group of tabs to shut them or transfer them into one other Workspace, and the browser’s “subpage” idea is complicated. (You possibly can open a new tab as a subpage inside one other tab, however you may’t transfer present pages into or out of a subgroup.) Even the straightforward act of modifying a URL turns into a chore, as a result of SigmaOS doesn’t expose the URL in its tackle bar. As an alternative, it’s a must to click on the “copy hyperlink” button, paste it within the tackle bar, and modify it from there.


[Screenshots: courtesy of SigmaOS]

SigmaOS additionally simply feels sluggish, even on an M1 Mac Mini. I observed a slight delay when switching between tabs, and I often skilled tabs reloading after clicking on them. I additionally bumped into a couple of crashes, which isn’t a enormous shock on condition that the browser is model new.

Ghassemi says the browser makes use of Apple’s WebKit rendering engine, citing excessive RAM utilization in Blink, the engine utilized in Chrome and different Chromium-based net browsers. However thus far, it’s onerous to see that call paying off.

The largest subject of all, although, is a lack of extension help. Meaning you may’t auto-fill passwords, use your favourite advert blocker, fill out masked e-mail addresses with Abine Blur, or save webpages to websites like or Pocket.

[Screenshots: courtesy of SigmaOS]

Once more, SigmaOS’s use of WebKit might be a legal responsibility right here, since it could actually’t simply faucet into Chrome’s present library of extensions like Chromium-based browsers can. Ghassemi says that SigmaOS is engaged on extension help, utilizing Chrome’s extension API as a workaround, however he declined to clarify how it will work, citing proprietary data.

For those who’re merely evaluating options, a lot of SigmaOS’s group instruments exist elsewhere. Combining Vivaldi’s Tab Stacks function with its vertical tab format would provide a related sort of group, and you can use its tiling function or net panels for split-screen webpages. And should you don’t wish to change browsers, Workona presents a browser extension for organizing tabs. (It additionally makes use of the time period “Workspaces.”)

SigmaOS stands out as a result of it doesn’t relegate these concepts to being elective options or add-ons. It’s an opinionated net browser that forces you to rethink your tab habits, and whereas I most likely received’t keep it up resulting from its present limitations, it did make me notice that higher methods of working on the internet are doable.