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Soulver vs SigmaOS

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

Option A
Soulver

Soulver

Productivity

Notepad calculator for the rest of us.

Soulver lets you mix natural-language math with text — perfect for back-of-envelope math without leaving prose. Built by a solo Australian developer.

Founder
Zac Cohan
Founded
2004
Team
1-10
Listing
Free (nofollow)
Listed
May 2026
View Soulver →
Option B
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 →

See more alternatives

Soulver alternatives →SigmaOS alternatives →