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One close playbook across every client.

We partner with your firm: our platform and our close playbooks deployed across your whole book of business, with our accountants and engineers alongside your team. Your people spend their hours on advisory, not manual close work.

Journal entry · closingPostedAlpenglow Chocolate Co.Period ended June 2026 · sample data
AccountDebitCredit
4000Revenue208,400.00
5000Cost of goods sold83,360.00
6100Payroll58,200.00
6200Marketing24,100.00
6900Rent, software & other18,800.00
3200Retained earnings23,940.00
Total208,400.00208,400.00
  • 3 bank accounts reconciled
  • AR and AP tie to their subledgers
  • Reviewed by your accountant
  • Audit trail on every AI action
  • Five days from pilot to first close review
  • Accountants and engineers on every engagement
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Everything the close touches. In one place.

Bank lines match themselves to the ledger. Every match is scored, and anything uncertain waits for a person.

Explore bookkeeping

The DayZero app, playing sample data for Alpenglow, our demo company. Nothing here touches a live account.

Pilot. Deployment. Partnership.

The pilot is free, and our prices are public.

Asked, answered.

Both. AI agents do the repetitive work inside your accounts, and accountants on our team review it, own the close and answer your questions.
No. DayZero has its own ledger, but you can keep QuickBooks if you'd like: keep it connected and approved work syncs both ways as native QuickBooks records. If you'd rather move, DayZero has direct migration connectors for QuickBooks Online and Xero. Connect via OAuth and it imports your chart of accounts, customers, vendors, items, transactions and balances, finishing with an opening-balance journal entry and a trial-balance QA report. From other platforms you can migrate via CSV import, and our team can assist with larger migrations.
No. Bill payments, transfers and anything that posts to the books wait for a person to approve.
Most are. The pilot starts with a review of your current file, a list of what's wrong, and a cleanup before the first close.
A real accountant on our team. They review every close, approve anything that posts, and you can reach them by text, email or Slack.
Run the books yourself on DayZero for $100 a month after a 30-day free trial, or have our accountants run them from $300 a month. Accounting firms pay per client. Every engagement can start with a free five-day pilot, and larger work such as QoE or custom software is quoted after it. See pricing.
Yes. Your data is encrypted: AES-256 at rest · TLS 1.2+ in transit. Preparing for SOC 2 Type II, report expected mid-2027; in the meantime we operate against the SOC 2 control framework, enforce role-based access controls, and maintain a full audit trail for every AI action. Your data is never used to train AI models — ours or our providers'.
DayZero runs purpose-built accounting agents — 24 agents with 638 tools, every write audited — and our accountants review the close. Every agent action records its inputs, the source documents it referenced, the rule or match logic it applied and a confidence score, in an audit trail you can review or export. You set confidence thresholds so anything uncertain routes to a person for review. Nothing is a black box: your auditors and your CFO get the traceability they need to sign off.
DayZero integrates with Plaid (banking), Stripe (payments), Shopify, Square, Ramp, HubSpot, Slack, and more, plus a migration connector for Xero and a migration and two-way sync connector for QuickBooks Online. ERP connectors for NetSuite and Sage Intacct plus Amazon are on the roadmap. You can request any integration and it directly shapes what we build next.
DayZero combines a connected accounting platform with accountants and engineers who can support your operation. Contracts, purchasing, inventory, cash planning, reporting and AI workflows share the same ledger. You keep access to the underlying records and can review the sources behind the work, whether your own team runs the platform or we help run it with you.

The close, off your plate.

Book a free pilot — your books, live on DayZero in five days. Bookkeeping, reconciliation, invoicing, and reporting, run by our team on software we built. You keep full access to every number the whole way.

We’re accountants and engineers. We built the software we always wanted to run books on — then we started running books on it.