Infrastructure startup Eureka Labs has secured $6.7 million in seed funding to develop its concept of "programmable blocks" for Ethereum, as reported by The Block.

This new approach transforms blocks from "passive containers" into active execution environments.

Typically, these structural elements serve merely to package and organize transactions. According to project head Nir Magenheim, the system architecture allows for the integration of logic "on the fly."

The following features become available:

  • Intra-block credit: Users can receive unsecured loans within a single block, provided they are repaid before finalization.
  • State-aware pre-computation: Complex operations can be conducted during the assembly phase based on the precise state of the network. Developers claim this approach reduces fees and enhances overall system stability.
  • Execution-time external data access: Real-time integration of off-chain information directly during execution.
  • Deterministic transaction placement: Guarantees that transactions are executed in a strictly defined sequence.

"This allows for guarantees at the block level, not just within smart contracts. For instance, applications can be created that require significant funds, strict operation sequences, or complex computations for a few seconds, which are unsuitable for direct on-chain execution," emphasized Magenheim.

He stated that these new features will enable the development of more advanced trading strategies, efficient DeFi protocols, and entirely new types of decentralized applications.

Business Model

Eureka's project is based on PBS architecture within the Ethereum network. In this concept, block formation is handled not by validators but by a separate category of participants known as specialized builders.

Magenheim believes that over time, these operators will become a new level of execution for blockchain, similar to how smart contracts once expanded the network's basic capabilities.

The startup's business model relies on collecting fees from transactions included in the formed blocks.

Eureka is headquartered in Tel Aviv and has a team of 12. The company recently opened a research center in Poland and is actively expanding its workforce in both locations.

According to Rated Network, the project began operations in December 2024 and has already become the fourth-largest Ethereum builder by the number of blocks created. However, the company's market share currently stands at a modest 1.5%, while nearly 96% of the segment is controlled by market leaders: Titan Builder, BuilderNet, and Quasar Builder.

Ethereum block producer rankings. Source: Rated Network.

Investments

The funding round was led by venture firms Spark Capital and Collider Ventures. Other investors include Varrock Ventures, Node Capital, Reverie, Very Early Ventures, Atka, Synergis, Masterkey, and several angel investors, including CoinList President Scott Kito.

As part of the agreement, Collider Ventures co-founder Avishai Ovadia has joined Eureka's board of directors.

According to the project leader, the capital was raised in two tranches: $4.7 million was received in April 2025, and the remaining $2 million from Spark Capital came in June. The deal was structured as a SAFE with token warrants.

It is worth noting that the Ethereum Foundation presented a new vision for the roles of base layers and rollups, shifting the focus from scaling to differentiation.