Sui Hashi Mainnet: How Bitcoin Lending Gets $500M Backing

Sui Hashi mainnet is set to go live this month with a notable amount of capital waiting for it. On October 8, 2026, the Sui Foundation announced that Hashi, its protocol for using bitcoin as collateral, will launch with more than $500 million in committed capital from a coalition of over 20 partners. Anchorage Digital has joined as a day-one launch partner.

• Launch: a phased mainnet rollout beginning later in October 2026, per the Sui Foundation.
• Capital: more than $500 million in commitments, which are pledges and not yet deposits.
• Coalition: over 20 partners, including Anchorage Digital, BitGo, Bullish, Cumberland, FalconX and Ledger.
• Design: bitcoin stays locked on the Bitcoin network while a token called hBTC represents it on Sui.

What Is Hashi and How Does It Work?

Hashi is built to answer a specific question: how can an institution borrow against bitcoin without handing the coins to a bridge or wrapping service on another chain?

CoinDesk's report on the launch describes the mechanics. A user locks BTC in a vault address on the Bitcoin blockchain itself. That vault is secured by a 2-of-2 multisig that requires sign-off from Hashi's validators. A separate, independent guardian layer monitors the system and can slow suspicious movements of collateral.

While the bitcoin sits locked, Hashi mints hBTC on Sui, a token backed by that deposit. Applications on Sui can then use hBTC for lending, borrowing and credit markets. To exit, the hBTC is burned on Sui, which triggers release of the original bitcoin on the Bitcoin network.

On assurance, CoinDesk reports that Certora formally verified Hashi's smart contracts and CommonPrefix reviewed the cryptography of its multi-party computation protocol.

Who Is Backing the Hashi Launch?

The Sui Foundation names BitGo, Bullish, Cumberland, FalconX and Ledger among more than 20 partners, alongside vault providers including Aftermath, Concrete and Fluid. Access will open progressively as partners complete their integrations.

Anchorage Digital's role is the headline addition. The firm plans to provide stablecoin liquidity and will give its institutional clients two routes into Hashi: Atlas, its settlement and tri-party collateral infrastructure for clients with qualified custody requirements, and Porto, its institutional self-custody wallet.

"Hashi is launching with serious capital and a coalition of industry leaders," said Adeniyi Abiodun, co-founder and chief product officer of Mysten Labs, the original developer of Sui.

A disclosure for readers: CoinDesk is owned by Bullish, which is one of the named Hashi partners. The facts here are drawn from the Sui Foundation's announcement and cross-checked against that report.

Why Does Bitcoin Collateral Matter?

The Sui Foundation's argument is about idle capital. It says more than $1 trillion in bitcoin sits largely unused because institutions lack a way to use native BTC in programmable markets. That figure is the foundation's own estimate, and it frames the opportunity: holders who do not want to sell could borrow stablecoins against their bitcoin, lend into onchain credit markets or place it in vaults with defined risk parameters.

This is a crowded and fast-moving area. Products such as Coinbase's fixed-rate bitcoin loans are approaching the same demand from a different direction, and Sui has been courting institutions for some time, as we saw with its confidential transfers beta.

What to Watch After Launch

Two data points will tell the story once mainnet is live. The first is conversion: how much of the $500 million in commitments becomes actual deposits, and how quickly. The second is breadth: how many of the 20-plus partners finish integration in the first phase.

The design choices are sound on paper. Keeping the bitcoin on Bitcoin, adding an independent guardian layer and publishing formal verification work all address the concerns that have held institutions back from earlier approaches. As always, nothing here is investment advice, and any lending product carries risk. But a launch with custodians, market makers and auditors lined up in advance is a constructive sign of how this market is maturing. More in our crypto coverage.

Sources: Sui Foundation — Hashi mainnet to launch with $500M in capital backing — October 8, 2026; CoinDesk — Bitcoin lending tech set to debut with $500 million in commitments — October 9, 2026.