logo
ProposalsVoters
©

2025 Agora, the onchain governance company

/
Twitter
/
Github
/
About
End User Experience & Adoption
OP Stack
Ultra Sound Relay icon

Ultra Sound Relay

Project

0xbC...6bd6
relay.ultrasound.money

Supporting decentralization through non-censoring proposer-builder separation.

Appears in
42 ballots

Contribution

In Nov 2022, 78% of Ethereum blocks censored OFAC transactions, undermining decentralization—a critical concern for both Ethereum and Optimism. Launching our credibly-neutral relay that month, we now connect to ~75% of validators, all major builders, and relay around ~30% of Ethereum blocks, reducing block censorship to 29%. This relay fortifies proposer-builder separation, leveling the playing field for all proposers in accessing MEV revenue, thereby bolstering decentralization. Running an effective relay is costly (10k - 20k a month) with thousands of block bids submitted each slot, and has so far been funded entirely by generous supporters.

Contribution links

    world

    Our own relay page.

    world

    Tracks the relay market.

    world

    Tracks the relay market.

Impact

Optimism can post it's data to L1 without worry. Users, builders, and projects on L1, but also L2 can feel they're participating in a credibly-neutral, strongly decentralized ecosystem. This has immediate effects for where people build or use projects today, but also has far reaching consequences for where people entrust their capital for the next 100-years.

Impact Metrics

  • % of blocks relayed
    30
  • % of validators connected
    75
  • # of blocks censored
    0
  • Funding sources

    Other
    No-strings funding from a ecosystem supporting builder.
    182,000.00 USD
    Other
    NounsDAO proposal 304 grant.
    166,000.00 USD