Your browser, already organized.
Favorites stay close, pinned tabs belong to a Space, and folders unfold only when the work calls for them.
The web,in full bloom.
A native browser for Mac, shaped around vertical tabs, focused work, and the speed to stay out of your way.
Alphav0.0.9macOS 15.5+ · Open source
Built around
the way you work.
Keep everyday tools close, separate projects into Spaces, and open more views only when the task needs them.
Up to four pages. One train of thought.
Read, compare, write, and research across as many as four pages inside one window and one Space.
A peek, not a detour.
Open a link above the current page, then close it, keep it as a tab, or send it into Split.
Keep the sound close.
Playback controls settle into the sidebar without covering the page or breaking your flow.
Page controls, together.
Permissions, site actions, and extensions stay by the address. Up to two pinned extensions appear in the URL bar; three or more move into a row below it.
Search the site you meant.
Type a supported site, press Tab, and send the query straight there — without visiting a search engine first.
Power when you ask for it.
Enable only the extensions you use. Disabled modules stay out of the way and use no system resources.
Set the atmosphere.
Build a palette from the page, tune it yourself, or keep one of Sumi’s restrained presets.
Make a site feel like yours.
Adjust the look of individual websites and keep those changes ready for the next visit.
Your tools, on your side.
Keep the vertical sidebar on the left or move the entire workspace to the right.
↔
More page.
Less browser.
Collapse the sidebar when you need the width. Turn on Frameless to let the page reach all the way to the window.
↔
CollapsedFrameless
Bring your browser
with you.
Bring over your spaces, tabs, folders, themes, profiles, bookmarks, history, cookies, website data, and more from Arc, Zen, Safari, Chrome, Edge, Brave, Firefox, and other installed browsers.
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Native speed.
Less baggage.
Sumi uses the WebKit already built into your Mac instead of shipping another browser runtime. Inactive tabs can unload without losing their place, and extensions can be switched off completely when you do not need them.
Built in public.
Sumi is independent, open source, and honest about what is ready. Follow every branch of development, read the code, or help shape what blooms next.
Apple Developer Program
Help Sumi ship
with confidence.
One year of Apple Developer membership helps move Sumi toward signed and notarized builds.