PQ1 vs GridPlus Lattice1: high-security hardware wallets compared

Last updated July 28, 2026

GridPlus Lattice1 is, on most security dimensions, the best classical hardware wallet on the market - a 5-inch touchscreen, multi-element architecture, the SafeCard hardware-backup ecosystem, and a strong commitment to verifiable supply chains. It’s the device most often recommended to high-net-worth holders who outgrow Ledger or Trezor. PQ1™ is built for the one dimension Lattice1 doesn’t address: the quantum threat. This page compares the two.

Side-by-side

Where Lattice1 wins

GridPlus has built a serious device. The categories where it leads:

• The screen. Lattice1’s 5-inch touchscreen is the best on-device transaction-review surface in the category. Smart-contract calldata that would scroll through PQ1™’s small LCD is fully visible at once on Lattice1.
• SafeCards. GridPlus’s smartcard-based backup ecosystem is unique. Each SafeCard is itself a tamper-evident secure element that can hold a derived key, allowing multi-card multi-sig and key-sharing workflows that don’t exist elsewhere.
• Multi-chain coverage. Lattice1 signs Bitcoin, Solana, and others. PQ1™ v1 supports Ethereum and every EVM L2 only - by design, since shipping Bitcoin or Solana would require a classical-signer fallback that defeats the post-quantum security promise.
• Maturity. Lattice1 has shipped since 2019 with an active firmware track record. PQ1™ is new.

Where PQ1™ wins

Post-quantum signing - the entire reason this comparison exists

Lattice1 produces only secp256k1 ECDSA signatures. Multiple secure elements, large touchscreen, hardware-backed multi-sig - none of it helps after Q-Day, because the signature scheme itself is broken. A quantum adversary doesn’t have to extract the seed from Lattice1’s secure elements; they compute the seed from the public key on-chain.

PQ1™ signs with SPHINCS+ - the hash-based signature family NIST standardized as SLH-DSA in FIPS-205 - using a parameter set called C10 (4-KB signatures, 128-bit post-quantum security). There is no ECDSA fallback in the firmware or smart wallet. After Q-Day, PQ1™ stays secure; Lattice1 does not. See why we built for Q-Day now, and the math behind the C10 parameter set.

Vendor-diverse seed split

Lattice1 uses two closed-source chips, but no public disclosure indicates the seed is XOR-split across them; both are reviewable only under vendor NDA.

PQ1™ splits the BIP-39 entropy across two CC EAL6+ secure elements sourced from different vendors (Infineon OPTIGA Trust M V3 + NXP SE050) with independent side-channel countermeasures. Neither chip alone reveals a single bit of the seed. Read more on the dual secure-element architecture.

Air-gap

Lattice1 includes Wi-Fi for “always online” companion-app pairing. GridPlus has invested in hardening the Wi-Fi stack, but it’s a present radio, with all the structural risk that implies. See the PQ1™ whitepaper for the air-gap threat model.

PQ1™ has no radio in the BOM at all - communication is USB-C HID only.

Account abstraction

Lattice1 produces standard EOA signatures. PQ1™ settles to ERC-4337 v0.6 smart wallets that verify the post-quantum signature on-chain via an immutable Yul verifier contract. Lattice1 will eventually support ERC-4337 signing - it’s a firmware upgrade - but the post-quantum signing capability requires firmware support Lattice1 doesn’t have.

Price

Lattice1 is $397. PQ1™ is $179. For most users, $220 is the difference between buying one wallet for self and one for a family member; for everyone, it’s the difference between an excellent classical wallet and a post-quantum wallet at less than half the price.

Bottom line

Lattice1 is the right choice if:

• You’re optimizing for classical-cryptography security and need the 5-inch screen for sophisticated calldata review.
• You need multi-chain coverage including Bitcoin and Solana.
• The SafeCard ecosystem fits your operational model (multi-card backup, distributed signing).
• Quantum risk is not part of your threat model.

PQ1™ is the right choice if:

• You take Q-Day seriously.
• Your holdings are on Ethereum and EVM L2s, and you want a vendor-diverse seed split rather than a single-vendor secure-element pair.
• $397 vs $179 matters.

For most long-term holders in 2026, the calculus has shifted: a quantum-secure wallet at $179 strictly dominates a classical-only wallet at $397. Reserve PQ1™.