Solo 2

Name: Solo 2
Price: 34 USD

Web · Windows · Mac · Linux · Android · iPhone

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Freedom report

Two barsScore 5.4

Free tierNo free tier on record
Open codeNo open-source code on record
Runs widely6 of 6 device platforms
DocumentedPlans, terms and facts published

Solo 2 is ranked #6 of 15 in security keys on Freedom251. It runs on Android, iOS, Linux, macOS, Web, Windows. There is no free plan.

Solo 2 plans and pricing

All plans

Solo 2C Security Key $34 once One-time purchase USB-C · no NFC solokeys.com · 5 Oct 2026

Solo 2 USB-A Hacker $35 once One-time purchase USB-A · unlocked for custom firmware · no NFC solokeys.com · 5 Oct 2026

Solo 2 USB-A Security Key $35 once One-time purchase USB-A · no NFC solokeys.com · 5 Oct 2026

Solo 2C+ NFC Security Key $46 once One-time purchase USB-C · NFC solokeys.com · 5 Oct 2026

Solo 2A+ NFC Security Key $46 once One-time purchase USB-A · NFC solokeys.com · 5 Oct 2026

Compared on security keys

Free plan: No
Paid from: 34 one-time
Authentication standards: FIDO2, WebAuthn, U2F
NFC support: No
Device management: none
Operating systems: Windows, macOS, Linux, Android

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The record

Product: Solo 2 is an open source FIDO2 security key designed to protect online accounts from phishing, account takeover, and unauthorized access.
Authentication: It supports FIDO2, WebAuthn, and U2F; basic use requires no software installation or drivers.
Touch confirmation: A capacitive sensor with three contact points confirms authentication when touched.
Integrations: It works with security-key-enabled services including Google, Microsoft, Facebook, Salesforce, GitHub, Dropbox, and Twitter/X.
Browser support: The maker lists Chrome, Edge, Safari, Brave, and Firefox as supported browsers.
Passkey storage: Solo 2 stores credentials and passkeys on the physical key, does not back them up to cloud services, and can store approximately 100 passkeys.
Open source: The maker says Solo 2 is fully open source: software is dual licensed under Apache 2.0 and MIT, hardware under CERN-OHL-S, and documentation under CC-BY-SA 4.0.
Attestation: Standard Solo 2 devices ship with locked firmware and SoloKeys attestation certificates; the Hacker model does not include attestation.
Key management: The solo2-cli tool can manage passkeys, firmware updates, PINs, PIV, and OpenPGP settings; the Solo 2 GUI is listed as coming soon.
Limits: If a user forgets the PIN, resetting the key erases stored passkeys; the guide recommends registering a backup key.
Support: For help with a purchased device, SoloKeys directs customers to its support email or contact form.
Intended users: Solo 2 is presented for everyday users, security professionals, and enterprise teams; Solo 2 Hacker is aimed at developers, security researchers, and makers.
Headquarters: Newark, Delaware, United States

Where it ranks on Freedom251

Best Security Keys in 2026#6 of 15

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Sources

solokeys.com/pages/solo-2-guide· checked 5 Oct 2026
solokeys.com· checked 5 Oct 2026
solokeys.com/collections/all· checked 5 Oct 2026