Choosing between the Trezor Safe 3 and the Ledger Nano X comes down to more than price. Both devices secure private keys in dedicated hardware, but they differ meaningfully in architecture, Bluetooth connectivity, firmware transparency, and the trust assumptions you are making when you plug one in. This article examines each device on the factors that actually matter for security — chip design, open-source posture, mobile compatibility, coin support, and recovery options — so you can make an informed decision heading into 2026.
Hardware Architecture and Secure Element Design
The single biggest technical difference between these two wallets is how each handles the secure enclave that stores your private keys.
Ledger Nano X: CC EAL5+ Certified Secure Element
The Nano X uses a dual-chip design: a general-purpose STM32 microcontroller manages the user interface, while a certified secure element (SE) — the ST33K1M5 chip — stores private keys and signs transactions. This SE carries a Common Criteria EAL5+ certification, meaning it has been independently evaluated to resist physical and side-channel attacks. The tradeoff, documented in Ledger’s own security model page on ledger.com/academy, is that the SE firmware is proprietary and cannot be independently audited by the public. Ledger’s operating system, BOLOS, is closed-source.
Trezor Safe 3: Open-Source Firmware with an Optiga SE
The Safe 3, released in late 2023, is Trezor’s first consumer device to pair an open-source firmware stack with a dedicated secure element — the Infineon OPTIGA Trust M (SLx 9670). Prior Trezor models relied solely on a general-purpose microcontroller with no SE at all. The Safe 3’s firmware, Trezor Suite, and the underlying TrezorOS remain fully open-source on GitHub under the trezor/trezor-firmware repository. Anyone can audit, build, and verify the code against the binary shipped on the device. The Optiga chip holds a CC EAL6+ rating — one step above Ledger’s SE on the Common Criteria scale — though Trezor’s attestation model for verifying SE integrity is still maturing compared to Ledger’s longer-established production process.
Connectivity: Bluetooth vs. USB-Only
The Nano X communicates with mobile devices over Bluetooth Low Energy (BLE) in addition to USB-C. This makes it the more convenient choice for users who manage crypto primarily from a smartphone through Ledger Live Mobile. However, Bluetooth introduces a wireless attack surface that does not exist on a USB-only device. Ledger’s security model documentation acknowledges this and notes that private keys never leave the secure element regardless of the transport layer — but the BLE stack running on the STM32 is an additional code surface that cannot be independently verified.
The Trezor Safe 3 connects only via USB-C. There is no wireless capability. For users who transact primarily from a desktop or laptop using Trezor Suite, this is no limitation at all. For users who need to sign transactions from an iPhone or Android device without a USB adapter, it is a genuine inconvenience.
Open-Source Posture and Auditability
Trezor has maintained a fully open-source firmware policy since the original Trezor One in 2014. The Safe 3 continues this tradition. Security researchers, wallet developers, and independent auditors can read every line of code that runs on the device. This is a meaningful security property: it means vulnerabilities are more likely to be found and publicly disclosed before they are exploited.
Ledger’s approach is philosophically different. The company argues that keeping SE firmware closed protects proprietary chip manufacturing agreements and that the Common Criteria certification process provides an equivalent level of assurance. Critics, including members of the Bitcoin developer community, argue these are not equivalent guarantees — third-party certification evaluates a snapshot of code, while open-source allows continuous community review. This debate is unresolved, but users should understand they are making a trust decision about Ledger as an organization when they use a Nano X.
Coin and Token Support
- Ledger Nano X: Supports over 5,500 coins and tokens as listed in the Ledger supported assets documentation. EVM-compatible chains, Solana, Cardano, Polkadot, XRP, and many more are available natively through Ledger Live or third-party wallets like MetaMask via the Ledger Ethereum app.
- Trezor Safe 3: Supports over 9,000 coins and tokens according to Trezor’s official coin support page, though a significant portion of that count includes ERC-20 tokens that can be added manually. Native support for Solana and Cardano was absent or limited as of early 2025; users should check the current trezor.io/coins page before purchasing if those networks are critical to them.
For most holders of Bitcoin, Ethereum, and major ERC-20 tokens, both devices provide adequate coverage. The gap matters most for holders of Solana-native assets or certain alternative Layer 1 chains.
Recovery and Backup Options
Both devices generate a standard BIP-39 seed phrase (12 or 24 words) during setup, compatible with any wallet that follows the BIP-39 and BIP-44 standards. Either device can theoretically be replaced by any other BIP-39-compatible wallet.
Ledger introduced Ledger Recover, an optional paid subscription service that encrypts and shards your seed phrase across three custodians. As documented in Ledger’s Recover whitepaper, participation is strictly opt-in and requires identity verification. This generated significant community backlash when announced in 2023 because it demonstrated that the device firmware is architecturally capable of exporting seed material — something Ledger had previously described as impossible. Users who do not enroll in Recover are not affected operationally, but the architectural revelation changed the trust calculus for many users.
Trezor offers no equivalent cloud backup service. Recovery is entirely the user’s responsibility via the physical seed phrase. The Safe 3 supports Shamir Backup (SLIP-39), which allows splitting a seed into multiple shares requiring a threshold to reconstruct — a more sophisticated option than a single 24-word phrase.
Price and Build Quality
As of mid-2025, the Trezor Safe 3 retails for approximately $79 USD from the official Trezor Shop, while the Ledger Nano X retails for approximately $149 USD from Ledger’s website. Both are available in multiple colors. The Nano X has a larger screen and a built-in battery required for Bluetooth operation. The Safe 3 is lighter and draws power directly from the USB connection, eliminating battery degradation as a long-term hardware concern.
What This Means for You
Neither device is universally superior. The right choice depends on your specific priorities:
- Choose the Trezor Safe 3 if: open-source auditability is a non-negotiable requirement; you primarily transact from a desktop; you want Shamir Backup for seed redundancy; or budget is a factor.
- Choose the Ledger Nano X if: you need Bluetooth for mobile transactions without a USB adapter; you hold assets on chains with limited Trezor support like Solana; or you trust the Common Criteria certification model and are comfortable with closed SE firmware.
- Avoid both if: you are buying from a third-party seller on Amazon or eBay. Both manufacturers warn against this in their official documentation. Supply chain integrity is critical — purchase only from trezor.io or ledger.com directly.
In the Trezor Safe 3 vs Ledger Nano X comparison, the Safe 3 holds the stronger position for users who prioritize transparency and verifiability. The Nano X holds the stronger position for users who need mobile flexibility and broader native chain support today. Neither decision is wrong — both devices will protect your keys far better than any software wallet — but you should enter the choice understanding exactly what trade-offs you are accepting.
The HodlGuide editorial team researches and tests crypto wallets and exchanges, documenting setup flows, fees and security practices so readers can choose the right tool for self-custody.