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Heptabase vs Pretzel

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
Pretzel

Pretzel

Productivity

A modern, end-to-end-encrypted email client.

Pretzel is a privacy-first email and calendar client for power users — built by a small indie team.

Founded
2023
Team
1-10
Listing
Free (nofollow)
Listed
May 2026
View Pretzel →

See more alternatives

Heptabase alternatives →Pretzel alternatives →