Nitrokey 3 review
A versatile open-source key family with broad standards support and a €48 starting price.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Nitrokey 3 is a family of open-source hardware security keys for two-factor and passwordless authentication, cryptographic key storage, email encryption, password management, and smart-card use. It is aimed at open-source users and security-conscious individuals or teams that need more than basic website authentication. Support includes FIDO2 passwordless authentication, FIDO U2F two-factor authentication, OpenPGP smart cards, S/MIME, X.509, PIV, Password Safe, one-time passwords, and secure cryptographic storage. Touch-button activation and PIN protection add device-level controls, while Nitrokey App 2 and nitropy handle firmware updates and PIN management.
The product family offers five listed configurations. Nitrokey 3A (No NFC) costs €48 one-time and includes USB-A, FIDO2, one-time passwords, OpenPGP smart-card support, and Password Safe. Nitrokey 3C (No NFC) costs €52 with USB-C, while the Nitrokey 3A Mini costs €54 with USB-A Mini. NFC models cost €60 for Nitrokey 3A NFC and €65 for Nitrokey 3C NFC. The differences make connector choice and NFC availability important purchasing considerations. There is no free plan, and the entry price is higher than a basic no-cost software authenticator.
Its main strength is breadth: one device family spans authentication standards, smart-card functions, password and OTP storage, and multiple operating systems, including Windows, macOS, Linux, BSD, Android, and iOS. The open-source design also fits users who prioritize inspectable software and hardware. Choose Nitrokey 3 when broad cryptographic support, platform coverage, and connector choice matter. Consider another security key if the priority is the lowest purchase price, or if a single model must provide NFC without comparing variants.
Nitrokey 3 pros and cons
- Where it wins
- Supports FIDO2, U2F, OpenPGP, S/MIME, X.509, PIV, and OTP
- Works with Windows, macOS, Linux, BSD, Android, and iOS
- Offers USB-A, USB-C, Mini, and NFC variants
- Where it doesn't
- No free plan; models start at €48 one-time
- NFC is available only on selected variants
- Connector and feature combinations vary by model
Nitrokey 3 fact sheet, pricing and score →
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