Startup Spotlight
← Back to directory

Compare

Fantastical vs SigmaOS

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

Option A
Fantastical

Fantastical

Productivity

The world's best calendar app.

Fantastical is the calendar app of choice for Apple power users — built by Flexibits, a small family-run studio.

Founder
Michael Simmons
Founded
2011
Team
11-50
Listing
Free (nofollow)
Listed
May 2026
View Fantastical →
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

Fantastical alternatives →SigmaOS alternatives →