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SigmaOS vs Mailbrew

Side-by-side comparison of two indie startups from the Startup Spotlight directory.

Option A
SigmaOS

SigmaOS

Productivity

The web is your operating system.

SigmaOS is an indie macOS browser built around workspaces and split-screen — a quieter Arc alternative from a small Berlin team.

Founder
Mahyad Ghassemibouyaghchi
Founded
2020
Team
1-10
Listing
Free (nofollow)
Listed
May 2026
View SigmaOS →
Option B
Mailbrew

Mailbrew

Productivity

Your daily newsletter, automated.

Mailbrew automatically composes personalized daily newsletters from Twitter, RSS, and Reddit. Built by Fabrizio Rinaldi and Francesco Di Lorenzo.

Founder
Fabrizio Rinaldi
Founded
2020
Team
1-10
Listing
Free (nofollow)
Listed
May 2026
View Mailbrew →

See more alternatives

SigmaOS alternatives →Mailbrew alternatives →