Charles Hoskinson Accuses Ethereum of Copying Cardano’s Roadmap

The Cardano founder framed the debate as an issue of attribution, technical memory and roadmap credibility. His response connected Ethereum’s native UTXO discussion to Cardano’s work on smart contracts, governance, treasury funding, Midnight, Hydra, partner chains, liquid staking and formal methods.

Charles Hoskinson reacted after an Ethereum proposal described payments as “one-shot objects” rather than permanent state. He argued that Ethereum is now moving toward ideas Cardano has spent years developing, while avoiding any direct acknowledgment of Cardano’s role in advancing UTXO-based smart contract design.

Ethereum Native UTXOs Put Cardano’s eUTXO Work Back in Focus

The dispute began with an Ethereum-side proposal around native UTXOs, which presented a model where payment objects would not remain as permanent state. The proposal argued that Ethereum could borrow ideas from Bitcoin’s UTXO architecture, prove existence from history and keep only limited spent-state data.

Hoskinson responded by pointing to Cardano’s own technical history. He said Cardano has spent roughly a decade working on UTXO, extended UTXO smart contracts and ways to combine UTXO and account-based systems. He also referenced Chimeric Ledgers, parallelism, reference inputs and the broader work needed to make UTXO-based smart contracts practical.

“Any mention of Cardano? None,” Hoskinson said while reacting to the Ethereum UTXO framing.

He argued that Ethereum circles had previously dismissed UTXO as too difficult for developers, while now treating the model as a future direction. In his view, the issue is not only that Ethereum is considering UTXO-like architecture. It is that Cardano’s work is absent from the discussion.

“We invent all the infrastructure for it,” Hoskinson said. “So instead of saying we should be like Cardano and give us attribution and credit, they don’t even mention it.”

Hoskinson also used the moment to reject claims that Cardano does not have smart contracts. He referred to comments from Arthur Hayes and described such claims as either uninformed, dishonest or deliberately misleading, pointing to Cardano’s smart contract launch years earlier.

Hoskinson Ties the Roadmap Claim to Governance, Treasury and Midnight

Hoskinson’s criticism moved beyond the native UTXO proposal. He described Ethereum’s direction as part of a broader pattern in which ideas first criticized under Cardano later reappear elsewhere as serious roadmap items.

“They literally copy our roadmap,” Hoskinson said.

He pointed to Cardano’s on-chain governance and treasury as examples of long-term infrastructure that he believes other ecosystems may eventually need to adopt. Hoskinson described Cardano’s treasury as a permanent source of development funding and said the governance system gives the network a mechanism to change itself over time.

He acknowledged that Cardano’s governance model is new and not perfect, but argued that later versions can improve because the system contains its own path for revision. He contrasted that with Ethereum’s foundation-led funding model, which he criticized as less sustainable.

Hoskinson then connected the argument to Midnight, Cardano’s privacy-focused partner chain. In his framing, Midnight is part of Cardano’s broader infrastructure strategy around privacy, abstraction, agents and compliance, not a separate side project.

He argued that Midnight’s use of lattice-based cryptography could become another area where other ecosystems eventually move after first choosing a different technical path. The same point appeared in his comments on formal methods, where he said Ethereum-side interest in Lean and formal verification follows work Cardano has treated as important for years.

The broader claim was that Cardano’s roadmap is not a loose collection of products. Hoskinson presented UTXO-based accounting, treasury governance, Midnight, formal verification, partner chains and Bitcoin DeFi as parts of a single architecture built around sustainability, scalability and interoperability.

Staking, Hydra and Implementation Quality Frame the Wider Dispute

Hoskinson also used the Ethereum comparison to highlight Cardano’s staking model. He criticized staking systems built around locking, slashing, bonding and synthetic staking assets such as Lido, then contrasted them with Cardano’s liquid, non-custodial staking design.

“There’s no locking in Cardano,” he said, adding that liquid, non-custodial staking already works at scale. In Cardano’s model, ADA holders can delegate without giving up custody or locking their assets.

He then connected Cardano’s scaling strategy to Hydra and partner chains. Hydra was presented as a way to scale applications on a dApp-by-dApp basis, while partner chains were described as a model for bringing other networks into Cardano’s broader system. Hoskinson mentioned ecosystems such as Polygon and StarkWare as examples of networks that could connect through a partner-chain approach where multiple participants share in the resulting activity.

The final part of his technical argument returned to UTXO itself. Addressing Vitalik Buterin directly, Hoskinson said, “UTXO is a good idea. I didn’t invent it, I perfected it.”

He credited Satoshi Nakamoto and Bitcoin for the original UTXO foundation, then argued that Cardano extended that model for smart contracts. He also warned that a poor Ethereum implementation could damage the reputation of UTXO more broadly, just as he said flawed proof-of-stake designs have affected how critics discuss proof-of-stake as a category.

Hoskinson’s criticism leaves the dispute centered on more than whether Ethereum adopts native UTXOs. The sharper issue is whether technical ideas long associated with Cardano are dismissed while they are built inside Cardano, then treated as credible once they appear inside Ethereum’s roadmap. In Hoskinson’s framing, the debate is now about attribution before adoption, and implementation quality before a design model is judged by the wider industry.