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Heptabase vs SigmaOS

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

Option A
Heptabase

Heptabase

Productivity

Establish a visual understanding of your research.

Heptabase is a card-based visual notes app for researchers and students — Roam meets Miro, with a deeply considered UX.

Founder
Alan Chan
Founded
2021
Team
1-10
Listing
Free (nofollow)
Listed
May 2026
View Heptabase →
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

Heptabase alternatives →SigmaOS alternatives →