Etalon keeps four versions of the truth in one ledger

Field notes

The system treats reconciliation as a persistent data model rather than a monthly spreadsheet exercise: source records retain their original payloads, and the unmatched difference becomes a sortable field. Its five-stage path runs from connection and scheduled retrieval through canonicalisation and identifier-based agreement to API delivery, warehouse export, XLSX or CSV, pivots, and Slack notices. The page describes REST APIs, OAuth, signed webhooks, and statement-file imports, with connectors written per source.