Protecting your online accounts is more important than ever, and security keys are a reliable way to enhance your digital security. If YubiKey isn’t right for your needs or you’re exploring other options for securing your data, this guide will offer you some excellent alternatives. From versatile designs to advanced features, we’ll help you find the perfect security key to meet your requirements.
Top 6 YubiKey Alternatives in 2025:
- Google Titan – Offers FIDO2 and WebAuthn support with the ability to store more than 250 passkeys
- Token2 – A versatile option with FIDO2 support, NFC compatibility, and biometric security features
- Nitroki – Open source security keys with USB-C and NFC options, supporting FIDO2 and TOTP protocols
- OnlyKey – Rugged keys with built-in PIN input and FIDO2, OTP and TOTP support
- Single keys – Open source switches with customizable designs, supporting FIDO2 and U2F standards
- Thetis – Affordable keys with USB-A, USB-C, and NFC options, including biometric models for added security
Whether you prioritize compatibility, price, or specific functionality, our list of the 6 best YubiKey alternatives will ensure you make an informed decision. Let’s dive into it!
Explore the top 6 YubiKey alternatives in 2025
Without further ado, let’s take a closer look at each of the YubiKey alternatives we’ve chosen. Our list covers security keys with a variety of form factors, connections, and authentication protocols. We’ve also made sure to include open source alternatives to YubiKey.
1. Google Titan – Support FIDO2 and WebAuthn, capable of storing 250 passkeys
the Google Titan Security Keychain is designed to enhance online security with strong two-factor authentication. These devices support FIDO2 U2F and FIDO2/WebAuthn standards and can store more than 250 unique passkeys, a higher capacity than many competitors offer.
Although the Google Titan Key lacks a fingerprint reader, it does include a haptic button that users must press to confirm logins, enhancing security without the complexity of biometric verification. However, it does not support OpenPGP, which may be a limitation for users who need to encrypt emails or files.
If you use a large number of online services and want to store a large number of passkeys, the Google Titan is one of the more compelling options on the market even though it lacks some features available on competing devices.
If you want to learn more about how the Google Titan compares to Yubico devices, be sure to take a look at our Google Titan vs. YubiKey comparison article.
2. Token2 – A versatile option with FIDO2 support
Token2 is a Swiss-based company that offers a range of FIDO2-compliant authentication solutions (the company itself is also a member of the FIDO Alliance).
Here we focused on Token2’s T2FT-PIN+ FIDO2 security key, but the company’s product suite can serve a variety of use cases.
The aforementioned security key is priced at around $20 and is capable of connecting to devices via USB Type-C and NFC (a USB-C variant is also available). The key can store up to 50 PASSKeys, 50 TOTP, and 1 HOTP, which is enough for most users. Users should keep in mind that the companion application created by Token2 is required for users to access the TOTP and HOTP functions of the token.
For those who want an extra layer of security, Token2 also offers security keys with biometric verification (fingerprint recognition). The company also provides authentication devices in various forms, such as NFC-enabled cards.
3. Nitrokey – Open source security keys with USB-C and NFC options
Nitroki It is a German company that sells open source hardware designed with a focus on security. When it comes to FIDO2 compatible security keys, Nitrokey has two models in its current range – the Nitrokey 3 and the Nitrokey Passkey.
The Nitrokey 3 can connect to devices via USB Type-C and NFC and supports WebAuthn, FIDO2, FIDO U2F, HOTP, and TOTP authentication standards.
The device also has a safe element with EAL 6+ certification. However, it is important to keep in mind that the Secure Element is only accessible when using the Nitrokey 3 via USB, but not via NFC.
Meanwhile, the more affordable Nitrokey Passkey has a very small form factor and supports WebAuthn, FIDO2, and FIDO U2F. While this will be enough for most users, it is important to note that this device can only connect via USB-A, does not have a Secure Element, and does not offer HOTP and TOTP support.
4. OnlyKey – Built-in PIN entry, FIDO2, OTP and TOTP support
OnlyKey It offers a variety of products that help users secure their online accounts. When it comes to FIDO2 compliant security keys, the company has two products – OnlyKey and OnlyKey DUO. Both devices offer extremely durable designs and are manufactured in the USA.
OnlyKey supports FIDO2, FIDO U2F, Yubikey OTP and TOTP. One interesting feature of OnlyKey is that users enter the PIN required to unlock the device directly on the device itself. If there are 10 incorrect attempts to enter the PIN, all data stored on OnlyKey will be erased.
The OnlyKey DUO, on the other hand, has a smaller form factor and supports USB-C in addition to USB-A, but has largely the same security features as the Onlykey.
5. SoloKeys – Open source keys with customizable designs
Single keys It is a company that produces open source security keys with a simple user experience and customizable skins, allowing users to customize the appearance of their security keys.
The firmware used by SoloKeys is built using Trussed, a framework written in the Rust programming language. The Trussed framework was developed by SoloKeys in partnership with NitroKeys, a company we previously highlighted in this article.
Although there are quite a few variants available in the SoloKeys product lineup, most consumers will likely opt for the Solo 2 USB-A, Solo 2 USB- or C, or Solo 2C+ NFC. The main difference between these variants is the types of connections they support – when it comes to authentication standards, these devices work with FIDO2 and FIDO U2F.
6. Thetis – Affordable switches with USB-A, USB-C, and NFC options
Thetis is a security key company that makes devices that aesthetically resemble old USB flash drives, which can be a benefit or a disadvantage depending on your preferences.
The company’s most affordable device, the Thetis FIDO2 Security Key, is a compelling option for anyone looking for a cost-effective security key that supports FIDO2, U2F, and HOTP. However, the connectivity of this device is limited to USB-A. The company also offers the FIDO2 BLE security key, which distinguishes itself by providing Bluetooth connectivity.
The Thetis Pro FIDO2 Security Key is the most versatile device in the company’s product range, as it is compatible with USB-A, USB Type-C, and NFC. Meanwhile, users who want additional protection through biometrics can consider the Thetis FIDO2 fingerprint.
Bottom line
We hope our article has helped you discover a YubiKey alternative that meets your requirements for a security key that will help protect your most valuable online accounts. Although Yubico still has a dominant presence in the security key market, there are quite a few alternatives to YubiKey on the market, some even featuring completely open source designs.
If you’re not satisfied with any of the YubiKey alternatives we’ve highlighted in this article and decide to purchase a YubiKey, we offer an article comparing the YubiKey 5 and YubiKey 5 FIPS to help you choose the best YubiKey for your needs.
