According to The Block, Ethereum block builder Eureka Labs has completed a $6.7 million seed round led jointly by Spark Capital and Collider Ventures, with participation from Varrock Ventures, Node Capital, Reverie, Very Early Ventures, and several angel investors. The financing was structured as a SAFE agreement with token purchase warrants. The round was completed in two tranches: $4.7 million in April 2025, followed by an additional $2 million from Spark Capital in June of the same year. Avishay Ovadia, founding partner at Collider Ventures, has joined Eureka Labs’ board of directors. The company was founded in December 2024, and this financing round was disclosed alongside its official public launch. Eureka Labs is introducing “Programmable Blocks,” transforming blocks from passive transaction containers into active execution environments that support collateral-free temporary lending within blocks (in-block credit), pre-computation based on precise state (reducing gas costs), real-time off-chain data ingestion, and deterministic transaction ordering.
Eureka Labs, Ethereum Block Builder, Closes $6.7M Seed Round Led by Spark Capital and Collider Ventures
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Summary
Eureka Labs, an Ethereum block builder, closed a $6.7 million seed round led by Spark Capital and Collider Ventures. Investors included Varrock Ventures, Node Capital, and Very Early Ventures. The round utilized a SAFE agreement with a warrant for token purchase, structured in two tranches: $4.7 million in April 2025 and $2 million in June 2025. Avishay Ovadia of Collider Ventures joined the board. This Ethereum ecosystem update follows the company’s launch in December 2024. Eureka Labs introduced Programmable Blocks, enabling intra-block lending, precomputed transactions, off-chain data access, and deterministic ordering. This development marks a step toward active block execution on Ethereum.
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