Quant Fusion has been live on mainnet since June 2: 74 blockchains in one multi-ledger rollup

Quant Fusion is what is known as a multi-ledger rollup: a settlement layer that connects several blockchains at once instead of running on a single one. It has been on mainnet since June 2, 2026, and Quant Network states that it links 74 blockchain networks in one shared environment. The heart of the matter is not the number but a promise: a token that today sits in seven copies on seven blockchains is meant to appear in this environment as a single value with a single liquidity pool.

This piece explains what works under the Quant Fusion rollup technically, how it differs from an ordinary rollup, what role the QNT token plays in it and which claims are documented. For what Quant is in the first place and what banks use the network for, see our overview of Quant, QNT and Overledger. This goes one level deeper.

Quant Fusion is a multi-ledger rollup, not a second layer 2

A classic rollup bundles transactions off a blockchain, nets them and writes the result back to that one blockchain. Arbitrum and Optimism work that way, and both hang off Ethereum. A multi-ledger rollup is meant to do the same for several blockchains at once: it executes transactions in an environment of its own and anchors the results in several connected networks.

Gilbert Verdian, the founder of Quant Network, announced the launch on X with a sentence that sums up the intention well: “Today we go live on mainnet with the Fusion Rollup, the world’s first multi-ledger rollup, connecting 74 blockchain networks in one unified environment, built for institutions.” The phrase “world’s first” is the company’s own presentation, not an independently verified fact. What is documented is the launch date and that the infrastructure is running.

Quant itself avoids the term layer 2 for Fusion and speaks of a category of infrastructure of its own. That is not pedantry: a layer 2 derives its security from exactly one base blockchain. Fusion does not have that single base, because it deliberately does not want one.

Before Fusion, institutions had two unsatisfactory routes: one blockchain or many bridges

The problem Quant describes is familiar to anyone holding tokens across several networks. It is not a problem of technology but of fragmentation. Verdian puts it this way in the same announcement: “For years, institutions had two bad options: bet everything on a single chain, or stitch together insecure bridges across many.” The first route leaves a bank’s clients and counterparties sitting on other networks; the second brings bridges into the picture.

A bridge is a link between two blockchains that locks a token on one side and issues a packaged representation of it, a wrapped token, on the other. That construction has been attackers’ favourite target for years, because the locked holdings sit in one place and the counterpart is only as safe as the contract issuing it. For a regulated institution a second problem comes on top: it has to be able to explain to its supervisor where an asset legally sits. With a wrapped representation on someone else’s blockchain, that question is uncomfortable.

Fusion is meant to make both routes unnecessary. Quant describes the moving of value, the settlement and the exchange of messages between networks as built firmly into the rollup instead of running over bridges. How robust that is in practice cannot be judged from outside yet, because there are no independent technical audit reports on it.

Unified assets: seven USDC copies become one uUSDC with a single liquidity pool

The part of Fusion that goes furthest beyond the usual interoperability is called unified assets. A unified asset is the representation of the same token across several blockchains as a single value inside the rollup. Quant names two examples: the stablecoin USDC, which today sits in copies on several networks, becomes uUSDC in the rollup. Holding USDC across two networks has so far meant two balances that know nothing of each other. BlackRock’s tokenised money market fund BUIDL becomes uBUIDL.

Why that counts becomes clear from liquidity. If a stablecoin sits in seven copies on seven blockchains, there are also seven separate liquidity pools. Moving a larger sum means moving it in the one pool where it happens to sit, at a worse price than pooled liquidity would give. That fragmentation is an annoyance for retail investors and a real cost factor for institutional volumes.

What matters for understanding it is what does not happen: the original token does not travel. On Quant’s account, every component stays anchored to its home blockchain and can be withdrawn at any time. The unified asset is therefore more a shared set of books over distributed holdings than a new token issued somewhere. That is precisely the difference from a wrapped token.

OP Stack and Hyperledger Besu: what works under the rollup technically

According to the technical description reproduced in trade coverage of the launch, Fusion is an optimistic rollup whose software builds on the OP Stack. Optimistic in this context means the system first assumes the submitted transactions are correct and allows a window in which someone can prove an error. That is the same basic idea working under Optimism and Base.

The difference sits beneath it. On that account the transaction data is not stored on a public blockchain but on a permissioned Hyperledger Besu network. Hyperledger Besu is Ethereum software that can also be run in closed networks where only approved participants may write. The state roots, meaning the cryptographic summaries of the respective system state, are returned to the connected layer 1 networks.

For banks that is the decisive property, and for part of the crypto scene the sore point. A permissioned data network means the data does not sit publicly on a blockchain that anyone can check. That meets confidentiality and jurisdiction requirements a public network does not meet. But it also shifts trust from mathematics back to the operators. Quant describes smart contracts with confidentiality protection, nodes with identity checks and access rules with which it can be set who may take part under which legal regime.

That design also explains why Quant builds the technology for institutions and not for the open market. A bank may only move client money through systems its compliance department can sign off, and that includes the question of who runs a node and which supervisor it answers to. An open network in which anyone can take part anonymously fails that requirement regardless of its technical quality. The compliance functions are therefore not an accessory but the actual reason to buy. Yet that is also where usage is decided: the stricter the admission rules, the smaller the circle of possible participants, and the longer it takes for noticeable volume to build.

Layer 2.5: why Quant places the rollup between blockchain and application

For its own position Quant has coined the term layer 2.5. What is meant is a layer that sits above the individual blockchains but below the applications. A layer 1 is the base blockchain, Ethereum for instance. A layer 2 relieves exactly one such base. An application layer sits above all of it and talks to the whole lot.

Fusion wants to stand in between and serve several layer 1 networks at once. Whether that term catches on is open; for now it is a provider’s self-description. Factually, though, it describes a genuine peculiarity, because a component that anchors its settlement back into several independent networks fits none of the established boxes. How Quant’s approach differs from other providers’ is in our comparison of Quant and Chainlink; both solve the same task by different means, and Chainlink’s price development is often read by investors as a gauge of the same bet.

The Trusted Node Program and the role of the QNT token

Further networks, public as well as private, are to be added through the Trusted Node Program, according to Quant. A trusted node is a node whose operator has been vetted and which takes part in processing transactions. For investors, the interesting question about it is where the QNT token comes in.

According to reports on the programme, node operators deposit QNT in order to take part in transaction processing. At the same time, overviews of Quant’s roadmap still list general QNT staking as an item without a fixed date. Those two statements cannot be reconciled cleanly from outside, which is why no clear picture is drawn here on purpose: that QNT has a function in the Trusted Node Program is described. To what extent that is already running, and how many tokens are actually locked for it, is not documented. If you read a figure on this, ask for the source.

The older, well-documented function of the token is a different one: commercial use of Overledger carries a licence fee that is settled in QNT. That construction has existed since late 2021 and is the actual reason the token has a job in the system at all.

Overledger connects, Fusion settles: two layers with two jobs

Overledger and Fusion are often lumped together, but they are two different things. Overledger is the older layer and at its core a universal connector: an application docks onto Overledger once and reaches several blockchains through it, without having to program a separate connection for each. That is integration work and saves companies effort.

Fusion is the newer layer and takes on something else, namely execution and settlement itself. One image for it: Overledger is the wiring through which all networks can be reached. Fusion is the place where the business is actually settled. For the commercial side of tokenised deposits, see our piece on Quant and tokenised deposits.

What is documented about the 74 networks and what Quant leaves open

The number 74 appears in every report on the mainnet launch, and in every one of those reports it comes from Quant itself. Gilbert Verdian too names no breakdown of the networks in his announcement, only the total. The company has not published a complete list of the connected networks, which trade coverage pointed out explicitly. The company’s presentation mentions public networks such as Ethereum alongside permissioned systems of the kind in use inside banks.

That is not an accusation but a piece of context that counts for any assessment. A technical connection is not the same as usage. A network can be connected in the sense of the count without a single piece of business ever having been settled over that connection. It is precisely on that distinction that it will be decided whether Fusion becomes infrastructure for real volume or remains a well-built facility waiting for customers. Trade press at the launch asked the same question: whether large banks will move from testing to live operation.

QNT in the market: rank 38 and the open question about revenue

On Sunday midday QNT was quoted at around $198, or roughly 176 euros, almost three percent below the previous day. Market capitalisation stood at about $2.9 billion, which corresponds to rank 38 among all cryptocurrencies. The price is far from its September 2021 peak of a good $427. The circulating supply is around 14.6 million tokens and therefore very close to the maximum the protocol provides for; hardly any new tokens are being added, which makes the supply side highly predictable.

The question that matters for investors cannot be answered from those figures, and it reads: does the revenue banks generate over this infrastructure actually flow through the QNT token? The licence fee for Overledger in QNT is documented. What is not documented is that every transaction settled over Fusion creates demand for the token. Buying QNT means buying a bet on that connection, not on the technology alone. Where the token can be traded in Germany, and which venues hold a licence under the European crypto regulation MiCA, can be looked up in our crypto exchange comparison.

uBUIDL and tokenised funds are the real test

That Quant names BUIDL of all things as an example is no coincidence. Tokenised money market funds are the segment in which institutional money is currently moving onto blockchains fastest, and they suffer particularly from fragmentation: a fund unit sitting on five networks means five sets of books for a custodian.

If a unified asset reduces that bookkeeping to one without the unit losing its legal anchoring, that has a measurable value for custodians and fund companies. It is the part of the promise most likely to find customers, and at the same time the part where it will show fastest whether the technology holds. A custodian running tokenised fund units over a third party’s settlement layer has to be able to explain that to its own supervisor.

The proof Fusion has to deliver before the clearing house start in 2027

Quant says it is working with the US payments body The Clearing House on tokenised deposits, with a start in the first half of 2027. That is the date on which the technology has to prove itself publicly, and until then there are three things by which progress can be read without having to believe the announcements.

First, a published list of the connected networks, or at least an independent check of the number. Second, a named user in live operation rather than a pilot project, meaning an institution that says it actually settles over Fusion. Third, a verifiable figure for how much QNT is locked in the Trusted Node Program. If none of those three pieces of evidence arrives, Fusion remains what it demonstrably is today: a running facility with a strong blueprint behind it.

Quant Fusion: without bank volume the rollup stays a blueprint

For investors in Germany a sober order of business follows from that. The technology is real and has been in operation since June 2026. The economic benefit for the token is not yet. Three steps make sense now:

1. Clarify the venue and its licence. Check which provider lets you trade QNT at all and whether it is licensed in the EU. Our comparison of regulated crypto exchanges shows which providers hold a MiCA licence.
2. Factor in the holding period and tax from the start. In Germany the gain from a sale stays tax-free after a holding period of one year; below that it counts as a private disposal. Holding over several years calls for clean records of the purchase dates; the tools for that are in our comparison of tax software and portfolio trackers.
3. Keep the three pieces of evidence in view. The network list, a named user in live operation, the locked QNT amount. For tracking metrics on an ongoing basis, the tools from our comparison of analytics platforms are suitable.

And through all of it one thing holds: QNT is a bet on an institutional rollout that is still outstanding. A total loss is possible with any crypto token, including one with a banking mandate.

Further evidence on the launch is in Quant Network’s announcement and in DisruptionBanking’s assessment.

(As of October 18, 2026. This article is not investment advice. Prices and fee structures change; check the terms with the provider before you buy.)