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04 — Trusted setup · Ceremony approach

Coordinated phase-2 ceremony platforms

Coordinated ceremony platform

In one paragraph

Coordinated phase-2 ceremony platforms: Coordinated ceremony platform. Coordinator-run platforms that automate queueing, timeouts, per-contribution verification and attestation publication across multiple circuits at once, with browser and CLI contribution. Maturity: Production-used, maintenance mode. Maintained by: Ethereum Foundation Privacy & Scaling Explorations (p0tion, DefinitelySetup); maintenance mode. Choose it when: Teams needing an open, browser-accessible phase-2 ceremony with many contributors, who do not want to build queueing and attestation plumbing themselves.

By MarketComp Updated v1.3 About the authors Changelog

What it is

Coordinator-run platforms that automate queueing, timeouts, per-contribution verification and attestation publication across multiple circuits at once, with browser and CLI contribution. The leading open platform states it is no longer actively developed, which is the most decision-relevant fact here: adopting it means owning it. Third-party coordination does buy something real — it constrains the project's ability to manipulate the ceremony software — but not its control of the circuit, the phase-1 artefact chosen, or the deployed verifying key.

Strengths and tradeoffs

Strengths
  • Removes most of the coordination work, which is where ceremonies usually fail
  • Real production track record across multiple independent projects
  • Per-contribution verification and timeouts are enforced by the platform, so a stalled or malformed contribution cannot silently block or weaken the chain
  • Attestations published automatically rather than collected by hand
Tradeoffs
  • The leading open platform is explicitly in maintenance mode — plan for self-hosting and self-maintenance
  • Requires billed cloud infrastructure, so the coordinator carries real cost and operational obligations
  • Cloud-hosted coordination concentrates liveness and censorship risk in one operator
  • Phase 2 only; not a phase-1 solution

Choose it whenTeams needing an open, browser-accessible phase-2 ceremony with many contributors, who do not want to build queueing and attestation plumbing themselves.

Maintained implementations

Ethereum Foundation Privacy & Scaling Explorations (p0tion, DefinitelySetup); maintenance mode

Maturity: Production-used, maintenance mode · License: MIT · github.com ↗

How to decide
Other ceremony approaches in §04
Avoid the setup entirely: transparent proof systemssnarkjs (powersoftau + zkey)gnark mpcsetupSequencer-mediated large public ceremonyCoordinatorless and on-chain ceremonies

Sources cited on this page · 1

  1. p0tion — phase-2 ceremony toolkit (in maintenance mode)tool

All 42 sources for §04 are listed on the section page →

Cite this page 
MarketComp (2026). Coordinated phase-2 ceremony platforms. The ZK Field Manual (Version 1.3). MarketComp. https://zkpick.com/ceremony/phase-2-platforms/
@misc{zkfieldmanual-coordinated-phase-2-ceremony-platforms,
  title        = {Coordinated phase-2 ceremony platforms — The ZK Field Manual},
  author       = {MarketComp},
  year         = {2026},
  version      = {1.3},
  howpublished = {\url{https://zkpick.com/ceremony/phase-2-platforms/}},
  note         = {Accessed: YYYY-MM-DD}
}