Aestus MEV-Boost Relay

The Aestus MEV-Boost Relay is a neutral, non-censoring block relay for Ethereum proof-of-stake validators and block builders.

Mission Statement

The Aestus MEV-Boost Relay is a neutral, non-censoring relay for Ethereum proof-of-stake validators and block builders. Our relay project emerged from conversations between members of the EthFinance and EthStaker communities who see the need to develop credibly neutral architecture for the Ethereum staking ecosystem.

MEV remains an important component of returns generated by those engaged in Ethereum PoS consensus. Despite their contributions to the community, several of the current relays are managed by companies and projects with direct financial interests in MEV and related revenue streams. Opaque relationships between relays, searchers and builders make it difficult for stakers to decide which relays to use or trust.

The Aestus relay is MEV infrastructure which is offered to the community as a public good, free from any commercial interest and aligned to principles of credible neutrality:

As of November 2023, the Aestus relay has been operating continuously for approximately 1 year and serves over 400,000 validators. This includes many solo stakers, Rocketpool nodes and teams from large staking entities such as LIDO. On a daily basis, between 1-5% of all ethereum mainnet blocks are negotiated using our infrastructure.

Aestus was originally viewed by its founders as a temporary necessity, destined only to fill what appeared to be a short term gap between the Merge and the development of enshrined proposer-builder separation within the Ethereum core protocol. The latest research now indicates that the path to an in-protocol solution may be significantly more challenging that initially anticipated. Aestus intends to remain in operation until this occurs


Relay Information

We are currently operating Ethereum Mainnet and Goerli relays. Both relays are open to public validators and builders. We anticipate launching a Holesky relay in the coming weeks.



Optimistic Relaying and Builder Policy

We have recently begun "optimistic" relaying. Builders will need to supply collateral of up to a maximum of 1ETH in a transaction to builder.aestus.eth and must have a recent track record without failed bids. To use this service, or to speak to us about anything else - please reach out to us via email or twitter.