Flashbots

• Name: Flashbots
• URL: https://www.flashbots.net/
• Category: MEV research and execution infrastructure / block-production supply-chain middleware / transaction protection / builder-market infrastructure
• Tags: ethereum-ecosystem
• Summary: Flashbots is a research and development collective formed to mitigate the negative externalities of maximal extractable value (MEV), starting with Ethereum. Its current primary-source surface is much broader than a single relay or research paper: Flashbots now spans validator-side middleware (MEV-Boost), user-facing private-orderflow protection (Protect RPC), block-building and rollup infrastructure (BuilderNet, rbuilder, Rollup-Boost), and an open research/grants/forum ecosystem. It is best cataloged as multi-layer MEV and transaction-supply-chain infrastructure rather than as only a research group, relay operator, or wallet-protection tool.
• What it does:
  • Builds MEV-Boost and related relay/builder infrastructure so Ethereum validators can access competitive block-building markets via out-of-protocol proposer-builder separation
  • Operates Flashbots Protect, a private transaction RPC that hides order flow from frontrunning/sandwich bots and offers MEV and gas-fee refund mechanisms
  • Maintains newer block-building infrastructure such as BuilderNet, rbuilder, and Rollup-Boost, extending the project beyond a single Ethereum relay into broader execution-layer infrastructure
  • Publishes open MEV research, Flashbots Research Proposals (FRPs), grants, and a public forum to shape protocol design and market structure around MEV
  • Maintains a large open-source GitHub surface that spans user protection, validator middleware, builder tooling, research, and coordination artifacts
• Key claims:
  • The official site and docs say Flashbots was formed to mitigate the negative externalities posed by MEV and organizes its work around three goals: Illuminate, Democratize, and Distribute
  • The docs explicitly segment Flashbots’ live operating surface across searchers, Ethereum users, and validators/builders/relayers, which is a strong signal that the project should be cataloged as ecosystem infrastructure rather than a single-product protocol
  • The MEV-Boost docs describe open-source middleware that lets validators access a competitive builder marketplace to improve competition, decentralization, and censorship-resistance on Ethereum
  • The Flashbots Protect docs say transactions are routed through a private Flashbots mempool, can receive MEV and gas-fee refunds, and are only included if they do not revert
  • BuilderNet’s official materials show Flashbots is still expanding the block-building stack, now framing part of the roadmap as a decentralized TEE-based builder network that shares MEV with the community
  • The public GitHub organization says Flashbots’ work is split across product, research, and coordination, with open-source repos, collaborative research processes, and grant pathways rather than a closed commercial product surface alone
• Whitepaper: No single canonical Flashbots company whitepaper or litepaper surfaced in this pass. The clearest current source of truth is the combination of the Flashbots site, docs, MEV-Boost and Protect docs, BuilderNet docs, GitHub organization, and major writings such as the mission and SUAVE essays; see ../whitepapers/flashbots-primary-sources-2026-04-27.md.
• Sources:
  • https://www.flashbots.net/
  • https://docs.flashbots.net/
  • https://docs.flashbots.net/flashbots-mev-boost/introduction
  • https://docs.flashbots.net/flashbots-protect/overview
  • https://buildernet.org/
  • https://github.com/flashbots
  • https://writings.flashbots.net/the-future-of-mev-is-suave

Internal linkages

• Keep the umbrella note on the clearest child surfaces: flashbots-auction, mev-boost, and buildernet.

• Useful cut: lower-tier orderflow and rights-sale notes can point up into this stack; this note does not need to validate every descendant.

• Last reviewed: 2026-06-01 UTC