Trezor Safe 3

The Trezor Safe 3 is the lowest-priced model in Trezor’s current Safe range: a two-button hardware wallet with a 0.96-inch monochrome screen and a secure element certified to EAL6+. Trezor launched it on 12 October 2023. It connects to a computer over USB-C, takes its power from that cable, and is managed in Trezor Suite. On 14 October 2026 Trezor’s comparison page listed it at $59, against $129 for the Safe 5 and $249 for the Safe 7.

Who is the Trezor Safe 3 for?

The Safe 3 fits someone moving coins off an exchange into a cold wallet who manages them from a computer and would rather pay less than get a larger screen. Like the more expensive Safe models, it runs Trezor’s open-source device software and supports BIP39 and SLIP39 backups.

It is a weaker match if you want:

• a touchscreen: the Safe 5 and Safe 7 both have color touchscreens;
• no cable: the Safe 7 is the Trezor model whose specifications list Bluetooth and a battery;
• signing with no USB or Bluetooth link to a computer or phone: see our guide to air-gapped hardware wallets;
• multisig inside Trezor’s own app: Trezor says Suite does not support multisig wallets directly, so you would pair the Safe 3 with compatible third-party software.

What is the Trezor Safe 3 screen like?

Trezor lists a 0.96-inch monochrome OLED at 128 x 64 pixels, operated with two physical buttons. By diagonal it is the smallest screen of the three current Safe models: the Safe 5 has 1.54 inches and the Safe 7 has 2.5 inches, both in color.

The body measures 59 x 32 x 7.4 mm and weighs 14 g. There is no battery: Trezor’s Safe 3 FAQ says the device is USB-powered, so it runs only while connected by cable. A February 2025 reply on Trezor’s community forum says all Trezor models are manufactured in the Czech Republic.

Is the Trezor Safe 3 secure?

Trezor’s security case for the Safe 3 rests on two documented parts: a secure element and open-source device software (next section). Trezor lists the secure element as a “Certified Chip EAL6+”, and its secure element page identifies it as the OPTIGA Trust M (V3). EAL6 is the sixth of the seven evaluation assurance levels defined in the Common Criteria, Part 3, which lets a level be augmented by adding assurance components or by substituting higher-level ones; the ”+” refers to such an augmentation. Trezor’s secure element page says it includes extra requirements such as protections against fault injection and side-channel analysis. Trezor attributes the certification to the chip, not to the wallet as a whole.

On 12 November 2024 Ledger Donjon, the security lab of rival maker Ledger, reported to Trezor that some Safe 3 countermeasures against supply chain attacks could be bypassed: the concern is a device altered before it reaches its owner. Trezor’s disclosure does not describe it as a way to extract keys from a wallet that was already set up and locked. The same page says the Safe 5 was not affected because it uses a newer microcontroller, and Trezor’s developer documentation says the Safe 3 “was upgraded post-release” and exists in two variants, depending on its chip.

The dated list below this article also records two phishing incidents involving Trezor’s support systems, in January 2024 and June 2025. Both were brand-level events, not flaws in the device. Trezor restricted support-portal access and warned affected users after the first, and said the second was contained and the phishing site taken down.

Is the Trezor Safe 3 open source?

The software is. Trezor’s security page says the software in its devices “has always been open-source” and that anyone can verify and build it from the public code. That lets outside researchers read the code that handles your keys. The statement concerns device software: we did not verify whether the design of the Safe 3’s secure element is open to review, and the Trezor pages we checked do not say whether the Safe 3 hardware design files are published.

How do you back up a Trezor Safe 3?

Trezor lists 12-, 20- and 24-word backups, in two standards:

• 12 or 24 words use BIP39. Trezor’s backup guide says BIP39 backups are widely supported by other wallets, so they restore without a Trezor.
• 20 words use SLIP-39, which splits a secret with Shamir’s secret sharing. Restoring needs SLIP39-compatible software or hardware, and the SLIP-39 specification says shares cannot be converted back into a BIP39 phrase. Trezor’s SLIP39 FAQ names Electrum and Sparrow among the software wallets that read it.

The same backup guide says the 20-word Single-share Backup has been the Safe 3 default since June 2024; units set up earlier defaulted to 12 words. You can pick another format from the Backup format menu when creating the wallet in Trezor Suite. Trezor’s SLIP39 FAQ lists the Safe 3 among devices that support Multi-share Backup with firmware 2.7.2 or newer: a separate set of shares where a chosen number, for example 2 of 3, rebuilds the wallet.

The Safe 3 also supports an optional passphrase. In the BIP39 design the passphrase is mixed into the seed, so each passphrase opens a different wallet and the words alone no longer restore the funds behind it. Our seed phrase guide covers how to store both.

Which coins does the Trezor Safe 3 support?

Trezor says the Safe 3 manages “1000s of coins & tokens” through Trezor Suite; we have not counted the list. Trezor also sells a Bitcoin-only edition of the Safe 3.

How much does the Trezor Safe 3 cost?

Trezor’s comparison page listed the Safe 3 at $59 on 14 October 2026; prices change, so the date is part of the figure. What the extra $70 bought on the Safe 5 that day is in Trezor Safe 3 vs Safe 5. For other makers, see Ledger vs Trezor and Coldcard vs Trezor, or browse the wallet database.

What we could not verify

• Which chip variant a given unit has. Trezor’s developer documentation confirms two Safe 3 variants, but we found no buyer-facing way to tell them apart.
• Hardware design files. The Trezor security page we checked covers software only.
• Country of manufacture. This comes from a forum reply, not from a product page.