Stripe’s Tempo Blockchain Raises $500 Million and Hires Ethereum Core Researcher Dankrad Feist

In a powerful move signaling its deepening commitment to blockchain innovation, Stripe’s Tempo project has raised $500 million in a Series A round that values the payment giant’s new Layer-1 blockchain at $5 billion, according to a report fromFortune. The funding round was co-led by Greenoaks and Thrive Capital, with participation from existing backers including crypto venture firm Paradigm, which helped incubate the project alongside Stripe.

While the funding alone underscores investor confidence in Stripe’s pivot toward decentralized payments, the announcement that Dankrad Feist, one of the Ethereum Foundation’s most respected core researchers, is joining Tempo has dominated industry conversation. Feist’s move marks one of the most significant talent transfers from the open-source Ethereum ecosystem to a corporate blockchain initiative in recent years.

Feist, who will help architect Tempo’s technical framework, said his decision reflects a desire to bring blockchain to everyday financial interactions. “I believe that the real-world moment is now,” he explained. “I want to make sure we do not miss this window to touch normal people’s lives everywhere in the world.” Though he will maintain an advisory role on select Ethereum Foundation initiatives, Feist emphasized that his new position at Tempo aligns with his long-standing goal of scaling crypto payments globally.

Ethereum co-founder Vitalik Buterin publicly supported the transition, wishing Feist success in his new role. However, not everyone shared the sentiment. Prominent figures across the crypto community voiced concerns that the move could weaken Ethereum’s open-source ethos. Podcast host Andy, co-creator ofThe Rollup, called it “a terrible look for open-source vs. corporate blockchains,” while crypto commentator Gwart compared the news to “Greta Thunberg joining an oil company.”

Others framed Feist’s defection as part of a broader trend of high-profile developers moving from decentralized to corporate-backed blockchain ventures. Laurence Day, co-founder of the decentralized lending protocol Wildcat, noted that the controversy echoed last year’s uproar over Ethereum researchers accepting advisory roles at Eigenlayer. “That Eigenlayer advisorship looks pretty tame by comparison now, doesn’t it?” he remarked.

The Tempo project represents Stripe’s latest effort to integrate crypto-native infrastructure into its global payments ecosystem. Designed as a scalable, compliance-ready Layer-1 blockchain, Tempo aims to bridge traditional finance with digital assets—offering instant settlement, lower transaction fees, and developer-friendly APIs for enterprise-grade applications.

Stripe’s entrance into blockchain is seen by some as a validation of the technology’s long-term potential beyond speculation. Yet, for Ethereum purists, Feist’s departure raises uneasy questions about the balance between decentralization, innovation, and corporate influence in Web3’s next chapter.

As Stripe prepares Tempo for its public debut, the convergence of major capital, elite talent, and industry debate sets the stage for one of the most closely watched blockchain launches of 2025.