Rsync Builder company
Overview
rsync-builder ranks among the largest block builders on Ethereum's MEV-Boost market, with a public endpoint at rsync-builder.xyz. Market analysis indicates that the firm operates its own in-house searcher focused on non-atomic arbitrage between centralised and decentralised exchanges. This capability contributed to a period during which rsync and beaverbuild together produced most MEV-Boost blocks, with a small number of builders accounting for the vast majority of block output. The builder's market share has varied over time as competitors like Titan have increased their presence.
Within The Counterparty graph, Rsync Builder connects to 4 tracked entities, most strongly to Ethereum, Ethereum, Flashbots Relay.
Relations
Top connections in The Counterparty knowledge graph (confidence-weighted, 4 of 4 total).
| Relation | Connected entity | Confidence |
|---|---|---|
submitted_by | Ethereum | 85% |
deployed_on | Ethereum | 85% |
submits_to | Flashbots Relay | 70% |
submits_to | Ultra Sound Relay | 70% |
Sources
Facts in this record were checked against the following. Where a claim is not covered here, the record states only what the graph holds.
Questions on the record
What competitive advantage does rsync-builder hold?
Analysts credit its market share to the operation of an integrated in-house searcher that specialises in non-atomic arbitrage, which generates valuable exclusive order flow.
How concentrated is the Ethereum builder market?
It is highly concentrated. Research indicates that a small set of builders—including rsync, beaverbuild and Titan—produce approximately 80-90% of all MEV-Boost blocks.
Through which endpoint do searchers submit bundles to rsync?
They submit bundles via the public builder RPC endpoint at rsync-builder.xyz.