Get Priority Access

Metasig protects crypto
when quantum drains the rest.

A multi-party wallet for teams and individuals,
with Post-Quantum cryptography built in.

Get Priority Access Watch Metasig Demo
The Team Wallet · Available Now

Treasury, payments, and approvals — without seed phrases.

Three phones showing the Metasig wallet across the full team workflow: a new signer joining the OG Treasury group on the left, a teammate approving an EFF donation in the middle, and a recovered device rebuilding its share on the right.
Live on these chains:
Deployment scheduled for:
Cryptography

Post-Quantum cryptography, built in.

Post-Quantum encryption is live in Beta today. Post-Quantum signatures are proven on Bitcoin and ready for the industry transition.

Live in Beta
Threshold signing & Post-Quantum encryption is live today.

Our wallet runs COAST + C-Foil in beta vaults right now — a threshold signature engine paired with a Post-Quantum hybrid encryption layer that defends sensitive operations against harvest-now, decrypt-later attacks.

COAST Live · 2024
Chain-orchestrated threshold signature scheme. The signing engine powering Metasig Team Wallet across Bitcoin, Ethereum, and EVM chains.
C-Foil Live · Jan 2025
Post-Quantum hybrid encryption (XChaCha20-Poly1305 + ML-KEM). Protects sensitive wallet operations from harvest-now, decrypt-later attacks.
Validated May 2026
Post-Quantum signatures & proofs are validated and ready.

COAST-PQ is the Post-Quantum-hardened successor to COAST, using STARK pre-aggregation. Verified on Bitcoin in May 2026 with only existing opcodes, no OP_CAT reactivation necessary.

COAST-PQ Validated on Bitcoin
Post-Quantum-hardened threshold signature scheme using STARK pre-aggregation. The natural successor to COAST as the industry approaches CRQC.
Anchor Validated on EVM
Post-Quantum authorisation gating for smart wallets and passkeys. Ensures the identity trust layer can't be forged.
Read the research →

Metasig was awarded

The Monetary Authority of Singapore’s Financial Sector Technology
Innovation (FSTI) Innovation Acceleration (IA) Grant

The FSTI IA grant provides funding support for experimentation, development, and dissemination of nascent innovative technologies in the financial services sector.

What's Next

From treasury teams today, to everyone tomorrow.

Live · Beta vaults today
Team Wallet
Running treasury, payments, and approvals for real teams. iOS. Multi-party signing. No seed phrases.
App Store · H2 2026
Retail Wallet
In active build. Self-custody for individuals, with the same cryptography stack that runs the Team Wallet today.
H2 2026
NFC Cards
Phone-paired hardware that carries the cryptography stack into physical form.
Built By

An experienced team that ships.

Luke Ryan
CEO & Co-Founder
Chartered accountant by training, with a decade in M&A across Asia-Pacific before moving to crypto custody full-time. Big Four and Fund Manager relationships.
Paul Salisbury
CTO & Co-Founder
Fourteen-year crypto security veteran. Architect and co-author of COAST and the COAST-PQ stack. Writes and speaks publicly on the Post-Quantum migration.
Guy Kloss
Head of Cryptography
PhD-level cryptography research background. Lead author of the COAST and C-Foil papers. Guest-lectures on applied cryptographic engineering.
Isaac Yong
Head of Engineering
Full-stack engineer and builder of privacy-focused products. Previously built mobile-first fintech for hundreds of thousands of users across Southeast Asia.
Get Started

Ready to protect your assets?