ReVouch

Finance teams approve reconciliations, invoices, accruals and journal entries across operational systems, documents and messages. ReVouch creates an append-only version graph in which each proposal cites evidence, each review binds to an exact version and each approved action is reconciled against its authoritative destination. The supplied research confirms several independent open projects converging on version-controlled finance records, policy gates and hash-chained approval logs, while finding no reviewed managed commercial product packaging the pattern. Those open projects and compliance platforms are observed market references, not fixed product pricing. Technical convergence validates the primitive, not buyer adoption or assurance. Append-only and signed are bounded properties: administrators, keys, storage, exports and external systems remain in the threat model. Proposal, evidence, policy result, approval, destination command, acknowledgement, readback, accounting posting, bank settlement and audit conclusion remain separate. A tamper-evident log can reveal later changes but cannot prove the original entry, approver identity, policy or accounting treatment was correct. The product can make control history reconstructable. It cannot certify compliance, replace segregation of duties or auditors, guarantee immutability or authorize a financial action merely because its record is signed.

A mid-market controller or finance operations leader needing stronger evidence across approvals, postings and reconciliations without exposing staff to developer tooling.