Krux

What it does

Krux turns supported development boards into Bitcoin signing devices using QR workflows. Its documentation covers hardware, installation and transaction signing. Check board compatibility and firmware verification before assembly; wallet descriptors and recovery backups need to be kept separately from the device.

Open-source signing device firmware for Bitcoin

Features & requirements

Custody

Self-custodySource · 8 Oct 2026 ↗

Pricing

Free software; network or service fees may applySoftware or documentation license; hardware, network and connected service charges are separate.Source · 8 Oct 2026 ↗

Platforms

HardwareSource · 8 Oct 2026 ↗

Bitcoin support

Native BitcoinSource · 8 Oct 2026 ↗

GitHub repositories

Stars

372

Stars gained · 7 days

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Forks

84

Primary language

Python

Repository license

Not checked

Last code push

Not checked

Popularity comes from GitHub stars. Seven-day growth appears after a full week of local snapshots; this is our collection, not GitHub’s official trending chart.

Sources & freshness

Editorial review · 8 Oct 2026

Imported records link to their sources. An entry is a discovery aid, not an endorsement.