Swiss digital asset bank Sygnum is partnering with Bitcoin (BTC) lending startup Debifi to develop MultiSYG, a new loan platform designed to give borrowers partial control over their collateral. The platform will use a secure multi-signature wallet, a first for this type of service.

Aimed at institutional and high-net-worth clients, MultiSYG provides a regulated and secure way to access Bitcoin-backed loans. The platform is scheduled to launch in the first half of 2026.

A New Model for Crypto Lending

MultiSYG offers a significant alternative to traditional crypto lending models, where borrowers typically surrender full custody of their assets to the lender. Instead, it operates on a multi-signature wallet system that requires approval from three out of five designated signatories for any collateral to be moved.

The signatories include Sygnum, the borrower, and other independent parties. This shared-control model is designed to eliminate the single points of failure that have led to major losses on centralized lending platforms. It also prevents rehypothecation—a practice where a lender reuses a borrower’s pledged collateral to back other transactions, often without the borrower’s knowledge.

Combining Security with Regulated Banking

A key feature of the platform is its on-chain transparency. Borrowers can cryptographically verify the existence and status of their Bitcoin collateral throughout the entire loan period. This addresses a growing demand for non-custodial lending solutions that blend blockchain security with established banking standards.

Debifi CEO Max Kei stated that borrowers shouldn’t need to trust a custodian blindly. According to Pascal Eberle, who leads the MultiSYG project, the platform combines the best of both worlds. He explained that it gives borrowers the ability to “hold your own keys” while accessing regulated banking products. This allows clients to benefit from bank-grade pricing, flexible drawdown options, and favorable loan durations while maintaining partial control and cryptographic proof of their holdings.