Direct head-to-head against the current peer cohort: Incognito, Archetyp, ASAP. Reviewer-rated on the features verified buyers care about.
The full comparison table is on the homepage. Highlights: Nexus is the only marketplace in the peer cohort that mandates 2-of-3 multisig escrow as a default rather than an opt-in. Nexus is one of two with Monero-default settlement (the other is Archetyp). Nexus is the only one with mandatory PGP-signed mirror rotation under a long-lived public key. Nexus has the best aggregate Trustonion score in the peer cohort (4.6 vs Archetyp's 4.3, Incognito's 4.1, ASAP's 3.9).
Where the peer cohort wins: Incognito has a marginally faster signup flow; ASAP has broader category coverage; Archetyp has lower vendor bond requirements. None of these wins offsets the architectural differences in the aggregate-score calculation.