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Heptabase vs K-9 Mail

A side-by-side look at Heptabase and K-9 Mail. For an in-depth review of either product, follow the links below.

Heptabase

Heptabase

Development

Heptabase is an open-source database management system built for developers to easily store, query, and manage data at any scale. It offers a flexible document data model with automatic indexing and powerful aggregations.

opensourcedatabasedocumentorientedscalable
Full review → Alternatives
K-9 Mail

K-9 Mail

Social & Communications

K-9 Mail is an open source email client for Android focused on security and privacy. It supports multiple accounts, search, tagging, notifications and more.

opensourcesecurityprivacyandroid
Full review → Alternatives

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