Eleven products. One Ledger.
This is the software our engineers deploy on every engagement — and the proof the firm executes at a different level.
One core. Eleven ways in.
Every product below reads and writes the same double-entry ledger. Add one, or run the stack — nothing lives in a separate silo.
Built to be wired in, not bolted on.
The same ledger your engagement team works in is the one your systems and agents can reach — a REST API, signed webhooks, and an MCP server, not a CSV export.
REST API
One API for the whole ledger — transactions, invoices, bills, journal entries, and reports, documented with an OpenAPI schema.
Webhooks
HMAC-signed events with automatic retries — subscribe an endpoint and every change in the books reaches your systems the moment it happens.
MCP server
Dry-run writes, in-chat approval gates, and an audit trail on every action — safe enough to hand to an agent.
Built to be operated for you, not by you.
Most businesses start on a general ledger built to be operated by you. You do the categorizing, the reconciling, the closing — the software just gives you a place to do it.
DayZero's ledger is built to be operated for you. Agents do the mechanical work — categorization, matching, drafting, flagging — around the clock, on your live numbers. Our accountants and engineers stand behind every close.
Nothing here is a black box. Every AI action lands in the same audit trail as a human one — inspectable, traceable back to the source document. That's not something the ledgers most businesses start on were built to show you.
The AI, directed.
638 tools across 24 specialized agents — forward-deployed teammates our engagement team directs, not a DIY builder you assemble yourself. Our people point them at your close; you never touch a prompt.
See the ledger our engineers deploy.
Schedule a pilot and we'll walk the platform on your own numbers.