Thetis review
Updated September 28, 2026 · ShieldCue Editorial Team · Facts checked September 26, 2026
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Our verdict
Thetis suits anyone who wants a hardware key with the full protocol set and a broad connector choice at a budget price, plus the option of keeping a spare. Budget keys run $24.99 to $49.99, which starts at the cheaper end and leaves room for a backup.
Key facts
- Best for
- Budget buyers who want biometric unlock, the full protocol set and every connector form in a single purchase.
- Price
- $24.99 to $49.99↗
- Protocols
- Fido2, U2f, Otp, Piv↗
- Connectors
- USB-a, USB-c, NFC↗
- Biometric unlock
- Yes↗
- Legal entity
- Razzo Tech Corporation DBA Thetis.io↗
- Headquarters
- United States↗
- Founded
- 2014↗
- Support channels
- Email, Help-centre↗
- Pricing model
- Budget
- Official website
- thetis.io
Facts checked September 26, 2026, 4 sources
Apps and profiles
- Get the app
- App Store
Pros and cons
Pros
- The protocol list is fido2, u2f and otp, covering FIDO2 alongside the older U2F, OTP and PIV standards on the same device.
- Biometric unlock is standard, so a fingerprint replaces a typed password on the services that offer it.
- Connectors come in usb a, usb c and nfc, so the same key suits a desktop, a laptop and a phone.
- Budget keys start below Google Titan Security Key at $30 to $35 and below the SoloKeys Solo 2 at $35.
Cons
- Support runs on email and help centre only, so a buyer whose key fails on a work laptop reaches a mailbox rather than a voice.
- The top of $24.99 to $49.99 runs above Google Titan Security Key at $30 to $35 and above the SoloKeys Solo 2 at $35, so the range is not the cheapest choice for every reader.
- Token2 lists €7 to €37, which starts under the Thetis range, though that quote sits in a different currency to $24.99 to $49.99.
- Most of the field sits at or below the €46.24, and the budget range crosses that line.
Who it suits
- First-time hardware key buyers who want biometric unlock without paying the top of the range.
- People running mixed accounts, since fido2, u2f and otp covers current sign-in and the protocols older services still ask for.
- Households and small teams that need a device to cover a desktop, a laptop and a phone, given usb a, usb c and nfc.
Who should look elsewhere
- SoloKeys Solo 2, if a fixed $35 suits the budget better than the $24.99 to $49.99 range.
- Token2, if a lower starting price matters more than biometric unlock, since €7 to €37 opens below the budget range.
- Google Titan Security Key, if a tighter price band works better, at $30 to $35.
What it does well
The Thetis line is built around a short protocol list that leaves little to fill in later. The full set is fido2, u2f and otp, and it mixes the current FIDO2 standard with U2F, OTP and PIV, so the key can hold everyday accounts alongside the older services that still expect a time-limited code or a smart-card style login. Connectors come in usb a, usb c and nfc, which means the same key can sit in a desktop port, a laptop port or a phone without an adapter in the box. Biometric unlock is part of the package, so a fingerprint can stand in for a typed password wherever a service offers it. Taken together, these three details decide how many keys a household actually buys: with every connector form and the full protocol set on one device, a spare becomes a comfort rather than a necessity. Readers weighing cost can pair those details with the $24.99 to $49.99 range and the 4 price rank among 15 brands compared.
Who runs it
Thetis is sold by Razzo Tech Corporation DBA Thetis.io, based in the United States and founded in 2014. The legal name sits above the brand, which matters for anyone buying hardware that has to live next to a laptop rather than a service that can be closed with a click. Support runs on email and help centre, so help arrives in writing and a help centre is there to check before a message is opened. That suits a buyer who is comfortable with a device and wants documentation on hand. For a small team that looks after keys for other people, the same written channel has an obvious advantage: answers can be read, forwarded and reused without waiting for anyone to pick up.
How Thetis compares
9.3 vs 9.1
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9.3 vs 9.4
9.3 vs 9.2
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9.3 vs 8.8
9.3 vs 9.3
9.3 vs 9.0
9.3 vs 9.0
9.3 vs 9.4
Frequently asked questions
How much does a Thetis security key cost?+
Thetis budget keys sit at $24.99 to $49.99, against a group median of €30.69 for the security keys compared here. The range starts at the cheaper end of the field and climbs past the €46.24 that covers most of the group, so the model suits a first key or a pair rather than a top-end purchase.
Do Thetis keys come with a subscription or a renewal price?+
Thetis keys are hardware, so $24.99 to $49.99 is the purchase figure for the budget model rather than a rate with a term attached. Readers who dislike a recurring charge have nothing to cancel and nothing to reprice at renewal, which is the clearest difference between a device like this and a service. The only repeat cost is buying a spare.
Which protocols do Thetis keys support?+
The Thetis key supports fido2, u2f and otp. That set covers FIDO2 for current sign-in, U2F for sites that never moved, OTP for accounts that send a code to the key, and PIV for smart-card style logins. A reader with older accounts on the same machine does not need hardware from another maker just to satisfy them.
Which connectors do Thetis keys come with?+
Thetis keys are offered in usb a, usb c and nfc. USB-A covers older desktops, USB-C covers most modern laptops, and NFC covers phones with no port to spare. NFC is the connector to check before buying, since it decides whether a phone works with the key at all rather than only at a desk.
Do Thetis keys have biometric unlock?+
Yes, biometric unlock is listed across the Thetis range, so a fingerprint can stand in for a typed password on any service that offers it. Combined with fido2, u2f and otp, the same key also handles services that still ask for the older protocols, which is exactly where a fingerprint is not an option.
How do I get help from Thetis?+
Support runs on email and help centre. Questions go to an email address, and a help centre is there to check first, which often answers the common cases faster than waiting on a reply. A buyer holding a faulty key should describe the connector and the protocol in the message, since that is what narrows the answer fastest.
Who runs Thetis?+
Thetis is sold by Razzo Tech Corporation DBA Thetis.io, based in the United States and founded in 2014. The brand name and the legal name line up, so a question about a specific unit has an obvious party to send it to. Buyers of hardware that stays plugged in for years tend to check that before anything else.
How does Thetis compare with cheaper hardware keys?+
Token2 lists €7 to €37, Google Titan Security Key lists $30 to $35 and the SoloKeys Solo 2 lists $35. Thetis budget keys fall inside the first two bands once currency is set aside. What the price spread does not show is that Thetis includes biometric unlock and an NFC option alongside the wired connectors.
Sources
- thetis.io checked September 26, 2026
Backs: Connectors, Headquarters, Legal entity
“The Pro Series supports USB A/C & NFC, making it the ultimate all-in-one solution.”
- thetis.io/collections/all-keys checked September 26, 2026
Backs: Biometric unlock, Pricing model, Price, Protocols
“Thetis FIDO2 BioFP Security Key - Passkey, USB-A, Fingerprint ... TOTP/HOTP and Eliminate PIN with Fingerprint”
- thetis.io/pages/about-thetis checked September 26, 2026
Backs: Founded
“2014 The Inception - Born in Silicon Valley, Thetis was founded with the vision to create invincible security solutions”
- thetis.io/policies/contact-information checked September 26, 2026
Backs: Support channels
“Email: mkt@thetis.io”
Compiled from 4 source pages, checked September 26, 2026. We did not open an account.
Related by the facts
Thetis
Budget buyers who want biometric unlock, the full protocol set and every connector form in a single purchase.