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Heptabase vs Soulver

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
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 →

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Heptabase alternatives →Soulver alternatives →