Which bitcoin custodian has no single point of failure, and what does each cost?

Custodians, collaborative multisig and multi-institution providers. The deciding columns are who can move funds and what happens when one party fails. It depends on what the holding has to survive: a single point of failure can be excellent at everything else and still lose everything at once, so read that column first, then the fees against your size.

Proof of Custody is published by Onramp Bitcoin, which appears in this table and is scored by the same methodology as every other platform.

AnchorWatch is not covered on this site by the publisher's decision. Its absence here is that decision, not an assessment.

Facts are from each provider's own documents and public filings with the date the record was last checked; "n/s" means not stated by the provider. Scores are Proof of Custody's judgement on the published methodology. Coverage is selected, not exhaustive; absence is not evidence of safety. As data: /data/matrix.json. Dispute a cell through corrections.