Audit firm tier

Usual (USD0 / bUSD0 / USUAL)'s assessment for RD-F-005 — scored green on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.

Evidence summary #

All 7 firms are Tier-1 or Tier-2: Cantina/Spearbit (Tier-1, Spearbit is top managed-review arm via Cantina), Sherlock (Tier-1 leading platform), Halborn (Tier-1 major firm), Hexens (Tier-2 established European firm), Paladin (Tier-2), Blackthorne (boutique). No unknown or low-quality firms.

Sources #

Internal
risk-dashboard/scripts/data-pipeline/audit-firms.jsonaudit-firms.json — canonical tier registryretrieved 2026-05-17
URL
Audits | Usual Tech DocsUsual tech docs audits page — 7 firms listedretrieved 2026-05-17

Methodology #

Classify each auditing firm into: Tier-1 (Trail of Bits / OpenZeppelin / ConsenSys Diligence / Certora / Sigma Prime / Spearbit / Zellic) / Tier-2 (established, named firm with public track record) / boutique / unknown.

See the full factor methodology and distribution across all protocols →

rubric_version v1.7.0 protocol usual factor RD-F-005 score green collected_at 2026-05-16 20:39:44