Trezor Safe 3
The Trezor Safe 3 is Trezor's entry-level hardware wallet with a CC EAL6+ secure element, fully open-source firmware, USB-C, and support for 9,000+ cryptocurrencies. It is the most affordable hardware wallet with both a certified secure element and fully auditable open-source code — a combination no Ledger device offers.
Best for open-source advocates who want verified security, skip if you need Bluetooth or a touchscreen.
Where to Buy
Pros
- Fully open-source firmware — anyone can audit the code that handles your keys
- CC EAL6+ secure element (Infineon Optiga Trust M) for tamper-resistant key storage
- 9,000+ supported cryptocurrencies — broader coverage than Ledger's 5,500+
- 13.1g and 59mm — lightest and most compact hardware wallet in this comparison
- USB-C connection
Cons
- No Bluetooth — USB-C only, cannot sign from phone wirelessly
- Small 0.96-inch OLED display (128x64) — same limitation as Ledger Nano models
- Single physical button — less intuitive than two-button or touchscreen interfaces
- No NFC
Open Source vs Closed Source
Trezor's firmware is fully open-source on GitHub. Every cryptographic operation, every key derivation, every signing routine can be audited by anyone. Multiple independent security researchers have reviewed the code. When Trezor says your keys never leave the device, you can read the code to verify this claim.
Ledger's firmware is closed-source. Ledger publishes security audit results and has a bug bounty program, but you cannot independently verify what the secure element firmware does. This is the fundamental philosophical split in hardware wallets: Trezor trusts the community to verify; Ledger trusts their own team to secure.
The Secure Element Addition
The Safe 3 is Trezor's first device with a CC EAL6+ certified secure element (Infineon Optiga Trust M). Previous Trezor devices relied on a general-purpose microcontroller with firmware-based security. The secure element adds hardware-level tamper resistance — physical attacks like voltage glitching and side-channel analysis are defended at the silicon level.
Critically, Trezor's implementation keeps the secure element's role transparent — the open-source firmware defines exactly how the secure element is used. This addresses the concern that a secure element could contain hidden backdoors: the firmware that interacts with it is fully auditable.
Full Specifications
Processor
| Specification | Value |
|---|---|
| security_chip | Optiga Trust M (CC EAL6+) |
| certification | CC EAL6+ |
| open_source | Firmware fully open-source |
Memory
| Specification | Value |
|---|---|
| supported_coins | 9,000+ |
| supported_chains | 50+ blockchains |
Connectivity
| Specification | Value |
|---|---|
| connectivity | USB-C |
| bluetooth | No |
| nfc | No |
I/O & Interfaces
| Specification | Value |
|---|---|
| Display | 0.96" OLED (128x64) |
| Touch | No (1 physical button) |
| USB | USB-C |
Power
| Specification | Value |
|---|---|
| battery | No (USB-powered) |
Physical
| Specification | Value |
|---|---|
| Dimensions | 59 x 32 x 7.4 mm |
| weight_g | 13.1 g |
| Form Factor | USB stick (compact) |
Who Should Buy This
Fully open-source firmware is the only way to independently verify what code handles your private keys. Ledger's firmware is closed-source — you trust their claims. Trezor's you can verify yourself.
9,000+ supported coins vs Ledger's 5,500+. If you hold tokens on lesser-known chains, Trezor's broader support may cover assets Ledger cannot.
No Bluetooth — cannot sign from phone. The Ledger Nano X adds Bluetooth for mobile signing. The Trezor Safe 5 adds NFC but still no Bluetooth.
Better alternative: Ledger Nano X
Frequently Asked Questions
Trezor Safe 3 vs Ledger Nano S Plus: which is more secure?
Both use CC EAL6+ secure elements. The key difference is firmware: Trezor is fully open-source (auditable by anyone), Ledger is closed-source (audited by Ledger and their partners). If you value independent verification, Trezor wins. If you trust Ledger's track record, both are equally secure.
Why does Trezor support more coins than Ledger?
Trezor's open-source firmware allows community-contributed coin support. Anyone can add a new blockchain. Ledger requires their team to develop and certify each app, which slows expansion but may provide more consistent quality.
Does the Trezor Safe 3 work with Ledger Live?
No. Trezor uses Trezor Suite (desktop and web app) for wallet management. The two ecosystems are separate. However, both devices support standard wallet protocols and can restore from each other's recovery phrases.
Is the single button hard to use?
The Safe 3 uses one button with different press patterns — short press, long press, and double press — to navigate menus and confirm transactions. It is less intuitive than the Ledger's two-button or the Safe 5's touchscreen, but functional once learned.
Can I recover a Trezor wallet on a Ledger device?
Yes. Both devices use the standard BIP-39 recovery phrase (24 words). Your recovery phrase restores your keys on any compatible wallet — Trezor, Ledger, MetaMask, or any BIP-39 wallet. You are not locked into one vendor.