# The Flashbots Builder is now sending to external relays

**URL:** https://collective.flashbots.net/t/the-flashbots-builder-is-now-sending-to-external-relays/898
**Category:** Relays
**Tags:** announcement
**Created:** [December 7, 2022, 10:05pm UTC](https://collective.flashbots.net/t/the-flashbots-builder-is-now-sending-to-external-relays/898 "2022-12-07T22:05:17Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![angelfish](https://collective.flashbots.net/user_avatar/collective.flashbots.net/angelfish/32/614_2.png) [@angelfish](https://collective.flashbots.net/u/angelfish)
#### Post date: [December 7, 2022, 10:05pm UTC](https://collective.flashbots.net/t/the-flashbots-builder-is-now-sending-to-external-relays/898/1 "2022-12-07T22:05:17Z")

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To [foster](https://twitter.com/bertcmiller/status/1577482338220404738?s=46&t=nqpWp-aLtUqcCXnwhr0cvA) a more competitive and healthy relay ecosystem, the Flashbots Builder is now sending blocks to [Agnostic Relay](https://t.co/tQebVy4bao) by GnosisDAO and [Ultrasound Relay](https://t.co/nlxHHv2oHL) by Ultrasound Money.

We have also added this feature to submit blocks to multiple relays to our [open sourced builder](https://github.com/flashbots/builder/pull/14).

**Blocks sent by our builders to Gnosis and Ultrasound Money:**

**Builder 1: Beef**

- [Gnosis](https://agnostic-relay.net/relay/v1/data/bidtraces/builder_blocks_received?builder_pubkey=0x81beef03aafd3dd33ffd7deb337407142c80fea2690e5b3190cfc01bde5753f28982a7857c96172a75a234cb7bcb994f)
- [Ultrasound Money](https://relay.ultrasound.money/relay/v1/data/bidtraces/builder_blocks_received?builder_pubkey=0x81beef03aafd3dd33ffd7deb337407142c80fea2690e5b3190cfc01bde5753f28982a7857c96172a75a234cb7bcb994f)

**Builder 2: Babe**

- [Gnosis](https://agnostic-relay.net/relay/v1/data/bidtraces/builder_blocks_received?builder_pubkey=0x81babeec8c9f2bb9c329fd8a3b176032fe0ab5f3b92a3f44d4575a231c7bd9c31d10b6328ef68ed1e8c02a3dbc8e80f9)
- [Ultrasound Money](https://relay.ultrasound.money/relay/v1/data/bidtraces/builder_blocks_received?builder_pubkey=0x81babeec8c9f2bb9c329fd8a3b176032fe0ab5f3b92a3f44d4575a231c7bd9c31d10b6328ef68ed1e8c02a3dbc8e80f9)

**Builder 3: Dead**

- [Gnosis](https://agnostic-relay.net/relay/v1/data/bidtraces/builder_blocks_received?builder_pubkey=0xa1dead01e65f0a0eee7b5170223f20c8f0cbf122eac3324d61afbdb33a8885ff8cab2ef514ac2c7698ae0d6289ef27fc)
- [Ultrasound Money](https://relay.ultrasound.money/relay/v1/data/bidtraces/builder_blocks_received?builder_pubkey=0xa1dead01e65f0a0eee7b5170223f20c8f0cbf122eac3324d61afbdb33a8885ff8cab2ef514ac2c7698ae0d6289ef27fc)

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<div class="post-metadata">

### Author: ![guayabyte](https://collective.flashbots.net/user_avatar/collective.flashbots.net/guayabyte/32/4_2.png) [@guayabyte](https://collective.flashbots.net/u/guayabyte)
#### Post date: [March 1, 2023, 5:08pm UTC](https://collective.flashbots.net/t/the-flashbots-builder-is-now-sending-to-external-relays/898/2 "2023-03-01T17:08:42Z")

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> [@Which relays should we send our blocks to?](https://collective.flashbots.net/t/which-relays-should-we-send-our-blocks-to/774):
>
> To help bootstrap the market we would like to submit our (Flashbots) builder’s blocks to other relays. However, this would mean sharing searchers and users’ transactions with a third party before they are including on-chain. How should we think about which parties we should trust?