Feature Trezor Ledger Nano S Keepkey Digital Bitbox CoolWallet OpenDime
Size 60mm x 30mm x 6mm , 12g 98mm x 18mm x 9mm, 16.2g 38 mm x 93.5 mm x 12.2 mm USB stick 85.6 x 53.98 x 0.8 mm USB stick
Screen 128x64 px 250×30 px OLED 256×64 px 3.12″ OLED None None None
OpenPGP Yes Yes No No No No
SSH Yes Yes No No No No
FIDO u2F Yes Yes No Yes No No
Certifications CE and RoHS CC EAL 5+ FIPS PUB 140-2 CC EAL 5+
USB connectivity USB Type A USB Type Micro-B USB Type Micro-B USB Type A USB Type A
NFC No No No No Yes No
Bluetooth No No No No Yes No
Release Date May 2013 July 2016 July 2015 March 2016 January 2015 April 2016
Open-Source Software? Yes No Yes Yes Yes No
Open-Source Hardware? No No No Yes No No
Open-Source Hardware? No No No Yes No No
Cryptocurrencies
Ether Yes Yes Yes No No No
ERC20 Yes Yes No No No No
Litecoin Yes Yes Yes No No No
ZCash Yes Yes No No No No
Dash Yes Yes Yes No No No
Doge Yes Yes Yes No No No
Others Ethereum Classic, Namecoin, Testnet Stratis Namecoin, Testnet
Hierarchical Deterministic Yes Yes Yes No Yes No