best security keys for passwordless login in 2025

Passwords are the weakest link in your security chain. Even a strong, unique password can be phished, leaked, or stolen. That's why the industry is moving toward passwordless login — and hardware security keys are the gold standard for making it work.

A security key is a small physical device that plugs into your computer or taps your phone. Instead of typing a code from an authenticator app, you insert the key and press a button. It uses FIDO2/WebAuthn, the latest authentication protocol, to prove you are who you say you are — without ever revealing a secret that can be phished.2

We looked at the top keys on the market, weighing protocol support, connector types, biometric options, and price. Here's what we found.

why hardware keys beat TOTP apps

You might be using an authenticator app like Google Authenticator or Authy for two-factor authentication. Those apps generate time-based one-time passwords (TOTP) — six-digit codes that refresh every 30 seconds. They're better than SMS, but they're still vulnerable to real-time phishing attacks. A fake login page can capture your code and use it immediately.

Hardware keys solve this. With FIDO2, the key cryptographically signs the request for the specific website domain. A phishing site can't trick it — the signature won't match. This is called phishing-resistant authentication, and it's the reason companies like Google and Microsoft now require hardware keys for their own employees.1

The shift to passkeys (Apple and Google's passwordless standard) makes this even more relevant. Passkeys are built on FIDO2, and a hardware key is the most portable way to carry your passkeys across devices.

the best security keys

1. best overall: yubico security key c nfc

Best for: Most people who want a reliable, affordable FIDO2 key.

The Yubico Security Key C NFC is the pick that keeps coming up in every serious roundup — and for good reason. It supports FIDO2/WebAuthn and U2F, works with USB-C and NFC (tap it on your phone), and costs significantly less than Yubico's flagship models.1

It's the simplest key to recommend: plug it in, register it with Google, Microsoft, or any passkey-supporting service, and you're done. No batteries, no drivers, no fuss.

Specs: FIDO2 + U2F | USB-C + NFC | ~$30 price tier

2. power user pick: yubico yubikey 5c nfc

Best for: People who need more than just FIDO2 — OTP, PGP, and smart card support.

The YubiKey 5C NFC is Yubico's flagship. It supports everything the Security Key does, plus OATH-TOTP (the same codes your authenticator app generates), FIDO U2F, smart card (PIV), and OpenPGP.3

If you're a security professional, a developer signing Git commits, or someone who wants to consolidate all your authentication into one device, this is the key. The trade-off: it costs more, and the extra protocols add complexity that most users won't need.

Specs: FIDO2 + U2F + OTP + PGP + PIV | USB-C + NFC | ~$55 price tier

3. biometric pick: yubico yubikey bio

Best for: A truly seamless passwordless experience with fingerprint unlock.

The YubiKey Bio adds a fingerprint sensor to the FIDO2 workflow. Instead of touching the key's button to confirm a login, you tap your finger. It's a small change that makes a big difference in daily feel — especially if you're logging in many times a day.

It supports FIDO2 and U2F, but notably does not support OTP or PGP. It's purpose-built for passwordless, not for legacy protocol compatibility. If you want the most modern, friction-free passkey experience, this is it.

Specs: FIDO2 + U2F (biometric) | USB-C | ~$80 price tier

4. budget / enterprise alternative: feitian fido2 security key

Best for: Bulk deployments, IT admins, or anyone who wants a solid FIDO2 key at the lowest price.

Feitian makes a range of FIDO2 keys that are widely used in enterprise deployments. They support the same core FIDO2 and U2F protocols as Yubico's entry-level key, often at a slightly lower price point. They're a strong alternative if you're buying for a team or just want a spare key without spending Yubico money.

Specs: FIDO2 + U2F | USB-C | ~$20 price tier

comparison table

quick setup guide

Getting started with a security key takes about two minutes:

1. Google: Go to myaccount.google.com → Security → 2-Step Verification → Add security key. Insert your key and follow the prompts.
2. Microsoft: Go to account.microsoft.com → Security → Advanced security → Add a new sign-in method. Choose Security key.
3. Apple (passkeys): On a compatible device, create a passkey and choose "Other device" or "Security key" when prompted to store it.
4. GitHub: Settings → Password and authentication → Security keys → Register new.

Most services that support passkeys or FIDO2 will have a similar flow: add a key, give it a name, touch the button, done.

which one should you buy?

• Most people: Get the Yubico Security Key C NFC. It does everything you need for passwordless login, and it's affordable enough to buy two (keep one as a backup).
• Security pros / developers: Get the YubiKey 5C NFC. The extra protocols (OTP, PGP) are genuinely useful if you know what they are.
• Friction-free experience: Get the YubiKey Bio. The fingerprint sensor makes passwordless feel truly effortless.
• Budget / bulk: Get the Feitian FIDO2 Key. It's a solid key at the lowest price.

Disclosure: We earn a small commission if you buy through our links, at no extra cost to you. We only recommend products we've researched and verified against our criteria.