Google Titan Security Key review: simple FIDO2 key

The Google Titan Security Key is a straightforward FIDO2 security key: you plug it in or tap it on a phone and confirm a login, and a fake website cannot use it. It is made for exactly that job and does not try to be a smart card. Google launched the current USB-A and USB-C models with NFC in November 2023. This is an editorial review based on Google’s published information, press coverage and prices, not a laboratory test.

What you get

Feature	Google Titan Security Key
Standards	FIDO2 and U2F, usable as passkey or second factor
Connectors	USB-A or USB-C, both with NFC
Bluetooth	No, the older Bluetooth model was withdrawn
Passkey storage	More than 250 passkeys, according to Google
OpenPGP, PIV, one-time passwords	Not offered
Price	Launched at 30 USD (USB-A) and 35 USD (USB-C); reported at 35 EUR in the Google Store for euro markets
Origin	Google, USA

Prices change, and the Google Store decides which regions it serves, so check the store listing. At the time of writing (October 2026) we did not find a newer generation than the 2023 models.

Strengths

Simplicity. The key does one job. You register it, set it up as a passkey or second factor and it stays out of your way. For people who want phishing protection without reading about smart-card applications, that is a plus.

Large passkey capacity. According to Google, the current model stores more than 250 passkeys. That is more than the documented capacity of the Nitrokey 3 and in the range of the best keys in this price class. For most users the limit is irrelevant, because only a handful of accounts need a passkey on a physical key. See how passkeys work for the difference between a hardware-stored passkey and a synchronised one.

Price. At about 30 to 35 EUR or USD, it is inexpensive for a branded, widely sold key, and cheaper than a YubiKey 5.

Google integration. The key works with the Advanced Protection Program, Google’s strictest account protection, which asks for security keys or passkeys. If you rely on a Google account for email and documents, that is a sensible match.

Limits

• No extra protocols. You cannot use it for OpenPGP, PIV smart-card logins or generating one-time passwords. If you need that, look at the YubiKey 5 or the Nitrokey 3.
• Closed firmware. We found no indication that the Titan firmware is open source. Google has published a separate research firmware called OpenSK, but that is not the firmware inside the Titan key. For people who need verifiable code, the Nitrokey is the alternative.
• US supplier. The key is Google hardware sold through the Google Store. Whether that matters depends on your threat model. For some European organisations, a supplier headquartered in the EU or Switzerland is a procurement requirement.
• Availability. Sales run through Google’s store, and availability differs by country.

Daily use

Setting up the key is the same as for any FIDO2 device. Open the security settings of your Google, Microsoft or other account, choose “add a security key”, insert the key or hold it to the phone’s NFC area, and touch it when it blinks. The browser checks the website address during the exchange, which is why the key resists phishing: our page on phishing-resistant multi-factor authentication explains the principle, and the page on FIDO2 and WebAuthn covers the protocols.

As with every key, buy two. A single hardware key that is lost, stolen or broken can mean losing access, and recovery processes are slow by design. Register both keys at each service and store the second one safely. Our overview of hardware security keys explains how many keys you need and where to keep them.

Who should choose it

Choose the Titan Security Key if you want a simple, affordable FIDO2 key with NFC, mainly for Google and other web accounts. It is also a reasonable second key next to a more capable primary key. If you need OpenPGP, PIV or open firmware, or you want a European maker, compare it with the others in our overview of the best hardware security keys.

How we assessed it

This review rests on Google’s announcement, press coverage of the 2023 launch, published prices and a comparison with the other keys in this guide. We did not run lab tests or attack the hardware, and we do not give star ratings. Because we found fewer technical documents for the Titan than for open-source keys, some statements, such as the passkey capacity, come from Google and are labelled that way. Check the Google Store listing for the current price, connectors and availability in your country.

Tips before you buy

Pick the connector that matches the device you use most: USB-C for current laptops and phones, USB-A for older computers. Both versions have NFC, so tapping on a phone works either way. Buy two keys, register both with your Google account and any other important accounts, and keep recovery options such as backup codes until both keys work. If you rely on a Google account, consider enrolling in Google’s Advanced Protection Program, which expects security keys or passkeys, and read the conditions first because it makes account recovery stricter.

Verdict

The Titan Security Key is a competent, no-frills FIDO2 key with generous passkey storage and a fair price. It lacks extras and openness, and it comes from a US company, which may or may not matter to you. For protecting everyday accounts with phishing-resistant login, it does the job.