Keystone 3 Pro vs Ledger Flex
The same rows for both, each value from the maker's own page or repository with the date it was checked.
Keystone 3 ProKeystone
Ledger FlexLedger
List price
$149 source
$249 source
Coins and tokens
5,500+ sourceThe manufacturer's own figure, tokens included.
15,000+ sourceThe manufacturer's own figure, tokens included.
Chains named by the maker
not verified
Bitcoin-only edition
Yes source
not verified
Firmware source
Open source · MIT source
Partly · MIT (app) sourceThe Ledger Wallet app is open source; the device operating system and secure-element code are not fully published.
Reproducible build
not verified
not verified
Secure element
Yes · 3 chips sourceMicrochip ATECC608B, Maxim DS28S60, Maxim MAX32520
Yes · CC EAL6+ sourceST33K1M5
Connections
QR, microSD source
USB-C, Bluetooth, NFC source
Air-gapped signing
Yes sourceSigns by QR code or microSD, without a cable or radio link.
No source
Screen
4" colour touchscreen, 480×800, fingerprint sensor source
2.8" E Ink touchscreen source
Backup
not verified
not verified
Passphrase
not verified
not verified
Company location
Hong Kong (licence holder Yanssie HK Limited) source
not verified
Security facts score
65
40
Ease facts score
65
80
Value (points per $100)
44
24
Scores: a published sum of the facts above. FormulaChecked 2026-11-13
Where they differ
- Keystone 3 Pro has the lower list price: $149 against $249.
- Source code: Keystone 3 Pro — open; Ledger Flex — partial.
- Only Keystone 3 Pro can sign without a cable or radio link (QR code or microSD).
- Only Ledger Flex has Bluetooth.
- Coins stated by the maker: Keystone 3 Pro 5,500+, Ledger Flex 15,000+.
- Secure element: Keystone 3 Pro — Yes · 3 chips; Ledger Flex — Yes · CC EAL6+.
More comparisons
FAQ
What is the difference between Keystone 3 Pro and Ledger Flex?
Keystone 3 Pro has the lower list price: $149 against $249. Source code: Keystone 3 Pro — open; Ledger Flex — partial. Only Keystone 3 Pro can sign without a cable or radio link (QR code or microSD). Only Ledger Flex has Bluetooth. Coins stated by the maker: Keystone 3 Pro 5,500+, Ledger Flex 15,000+. Secure element: Keystone 3 Pro — Yes · 3 chips; Ledger Flex — Yes · CC EAL6+.
Which of the two is better?
That depends on what you need; this page does not pick one. It lists the facts from the makers' own sources and, for hardware wallets, fact scores computed by a published formula.