Inside Colossus’s Bid to Replace Visa and Mastercard With KYC-Free Crypto Cards
Joseph Delong’s desk no longer resembles a typical software developer’s setup. Instead, it looks more like a cramped electronics lab, crowded with point‑of‑sale terminals, plastic sample books from card manufacturers, and an assortment of card readers and cables.
All of this gear, ironically, belongs to an effort to disrupt the very payment infrastructure it represents. Delong, a veteran Ethereum engineer and former CTO of SushiSwap, is assembling what he calls a “box of goodies” as he builds Colossus-a stablecoin‑powered credit card network aimed at competing with Visa and Mastercard, and doing it without the usual know‑your‑customer (KYC) procedures.
Working from his home office in San Antonio, Texas, Delong describes the process of getting his hands on the physical hardware as almost esoteric. Acquiring point‑of‑sale devices, accessing firmware documentation, and understanding how closed payment networks operate has felt, to him, like breaking into a guild that guards its trade secrets carefully.
Colossus is being built by a tiny team: just four employees. Yet this small group is preparing to launch its own Ethereum layer‑2 scaling network, with a debut targeted for March. The chain is explicitly designed to take over the role that banks and card networks currently play in settlement, replacing those centralized rails with a sovereign, crypto‑native payment layer.
Not Your Keys, Not Your Card
Colossus starts from a simple, uncompromising principle: if you don’t control the keys, you don’t really control the payment instrument. In the traditional card world, issuers, processors, and networks sit between the user and their money. Cards can be frozen, accounts can be closed, and transactions can be reversed at the discretion of centralized entities.
Delong’s project aims to invert that model. Cards issued through Colossus are designed to act as a front‑end to self‑custodied stablecoins. The card is simply a tool for spending funds that users already control on-chain. Instead of keeping balances with a bank or card issuer, holders would keep their funds in a wallet they own, and the Colossus infrastructure would translate that on‑chain value into a format point‑of‑sale terminals can understand.
This is where the KYC‑less element comes in. Rather than onboarding users through standard banking channels-where identity verification, background checks, and detailed personal data are unavoidable-Colossus envisions a system where the primary requirement is access to a compatible wallet. If you can hold and sign with keys, you can use the network.
An Ethereum Layer‑2 Built for Payments
While many layer‑2 networks exist to make Ethereum cheaper and faster, Colossus is being engineered with a very narrow purpose: card‑like payments at scale. Settlement happens on an Ethereum L2 secured by Ethereum’s base layer, but optimized around payment throughput, low transaction costs, and predictable confirmations.
In the current card ecosystem, merchants send transaction data to acquirers, acquirers talk to networks, networks talk to issuers, and at the end of that chain, a bank makes the final call. Settlement takes days. Colossus aims to compress this into near‑real‑time finality using an L2 chain, while still preserving compatibility with existing card hardware.
That’s why Delong’s desk is cluttered with POS machines and card readers. The challenge isn’t just building the crypto rails-it’s making those rails talk to the physical world. Terminals need to be convinced that they’re processing an ordinary payment, even though the underlying value is moving across an Ethereum‑secured network using stablecoins rather than fiat bank balances.
Why KYC‑Less Cards Matter
Removing KYC requirements from card issuance is both a technical and ideological statement. On the practical side, KYC creates friction. It slows down onboarding, excludes entire categories of users-like those without standard documentation or access to compliant financial institutions-and introduces a permanent risk of surveillance and data leaks.
On the ideological side, the crypto ethos has long emphasized permissionless access. Blockchains allow anyone with an internet connection to receive, hold, and send value. But the moment crypto touches the traditional card stack, those freedoms are usually curtailed. Colossus is an attempt to keep the permissionless nature of crypto intact all the way to the point‑of‑sale terminal.
That doesn’t mean transactions are invisible or untraceable. Activity on an Ethereum L2 is still public and auditable. The difference is that gatekeepers aren’t sitting at the entrance deciding who is allowed to participate. The wallet, not the passport, becomes the identity primitive.
Taking on Visa and Mastercard
Trying to displace entrenched giants like Visa and Mastercard might seem ambitious for a four‑person team-but Colossus isn’t trying to replicate every function of these networks on day one. Instead, it’s focusing on the critical piece where it believes crypto has a real advantage: settlement and custody.
Traditional card networks provide global interoperability, fraud protection, dispute resolution, and compliance frameworks. Colossus intends to reduce the role of intermediaries, letting smart contracts enforce rules and facilitating direct settlement between users and merchants using stablecoins.
By tapping into Ethereum’s global liquidity and composability, Colossus hopes to become a neutral, programmable settlement layer. In principle, any wallet, merchant gateway, or financial application could plug into the network and start issuing or accepting card‑style payments without signing restrictive deals with legacy card processors.
The Hardware Barrier
A major obstacle for any crypto‑card challenger is the hardware layer. Point‑of‑sale terminals and card readers are built for the existing ecosystem, tightly integrated with specific payment providers and protocols. Much of this infrastructure is poorly documented, deliberately closed, or guarded by contractual restrictions.
Delong’s comments about “arcane knowledge” reference this reality. Accessing device SDKs, flashing firmware, understanding message formats, and ensuring regulatory compliance with chip and PIN or contactless standards all require navigating fragmented documentation and opaque business relationships.
Colossus’s strategy is to respect the standards necessary for compatibility-so that any merchant with standard terminals can accept payments-while redirecting the actual value flow onto its Ethereum L2. The card presented to the terminal might look conventional, but behind the scenes, the authorization and settlement logic are handled by crypto infrastructure.
Stablecoins as the Core Value Layer
At the heart of Colossus is a stablecoin‑driven model. Instead of denominating balances in traditional checking accounts, user funds are held in stablecoins on the L2. This brings a few key advantages:
– Instant finality or near‑instant finality once blocks confirm.
– Programmability, allowing developers to build advanced payment logic like spending limits, subscription models, or on‑chain rewards directly into user wallets.
– Interoperability with the broader DeFi ecosystem, letting users move seamlessly between earning yield, trading, and everyday payments.
The card becomes an abstraction layer on top of these stablecoins. Tapping or swiping at a terminal triggers an on‑chain transaction or a series of on‑chain commitments that settle the payment. For merchants, the goal is to make this indistinguishable from traditional settlement in terms of reliability-while potentially offering lower fees and faster access to funds.
Regulatory Grey Zones and Risk
Operating KYC‑less in a world increasingly focused on financial surveillance is inherently controversial. Regulators around the globe are tightening controls on digital assets, particularly around stablecoins and pseudo‑anonymous transactions.
Colossus is threading a narrow path: building infrastructure that technically does not custody user funds (since users hold their own keys) and does not act as a bank in the traditional sense, but still interacts with real‑world commerce through card networks and terminals.
This raises sophisticated questions about where regulatory responsibilities lie. If users bring their own wallets and merchants simply accept payments converted via on‑chain settlement, the network may position itself as a technology provider rather than a financial institution. However, the closer Colossus gets to mainstream usage, the more pressure it may face to incorporate compliance features.
User Experience: Can Crypto Feel Like a Normal Card?
For Colossus to have any chance of challenging Visa and Mastercard, it must make the crypto experience feel familiar to everyday users. That means:
– No complex signing flows at the checkout counter.
– No confusing delays or manual token swaps.
– No requirement to understand gas, L2 bridges, or private key management in depth.
Delong and his team are trying to hide the complexity beneath a card metaphor people already understand. Users keep funds in wallets, but at the point of payment, all they have to do is tap or insert a card, as they would with any normal credit or debit card. The network handles the on‑chain choreography behind the scenes.
At the same time, the “not your keys, not your card” philosophy implies that users must ultimately take responsibility for their keys. Colossus will likely need to support a range of custody models-from fully self‑managed wallets to smart‑contract‑based safety nets and social recovery mechanisms-to avoid making the system too fragile for mainstream adoption.
Merchant Adoption and Economic Incentives
Convincing merchants to care about a new payment network is another hurdle. Most businesses are already integrated with existing card processors, and switching or adding a new provider often only happens if there is a clear economic upside.
Colossus is betting that lower fees and faster access to funds will be compelling. If stablecoin‑based settlement on an Ethereum L2 can reduce interchange and processing costs while also delivering near‑instant settlement, merchants could see a tangible benefit. For small businesses that struggle with cash flow or suffer from chargebacks, this might be particularly attractive.
Another angle is global reach. Stablecoin payments can, in theory, bypass the fragmentation of international banking. A merchant could accept payments from customers anywhere in the world without needing separate acquiring relationships for each region. If Colossus can package that into a simple card‑plus‑terminal experience, it might open up cross‑border commerce with far less friction.
The Long Game: From Experiment to Infrastructure
Colossus is still early. With only four people on the team and a planned L2 launch in March, it sits closer to experimental infrastructure than to a full‑fledged Visa replacement. Yet the direction is clear: merge the global, permissionless nature of crypto with the ubiquity of card payments, while stripping out the legacy banking layers in between.
If it works, users could hold stablecoins in wallets they control, tap a card at any standard terminal, and have the value settle over an Ethereum‑secured network without undergoing traditional KYC. Merchants could receive funds faster and potentially pay less in fees. Developers could build new financial products atop a programmable payment layer that plugs directly into everyday commerce.
Whether Colossus can navigate regulatory pushback, merchant inertia, and the technical challenges of hardware integration remains to be seen. But the project embodies a growing trend: using layer‑2 networks not just to trade tokens, but to rebuild the core infrastructure of how money moves in the real world-on terms defined by code and cryptography rather than by legacy institutions.