How Apron is making the agentic bookkeeping team member a reality with William AI

Designed for trust, built for scale

AI is moving from tools that assist with bookkeeping to agents that can actually do the work. For bookkeepers, the difference is software that reads your documents to software that handles repetitive work so you can focus on what actually needs your expertise.

William AI is built on that foundation. It searches connected inboxes for missing receipts, categorises documents based on guidance you've provided, then either publishes to your ledger or flags the item for review, explaining its reasoning at every step.

Trusting software with that level of judgment is a significant ask for firms and business owners. This series of blog posts explores how Apron built William AI from an extraction tool into a fully-fledged AI team member… and where the work is going.

One solution that does more
Bookkeepers and business owners don’t need another standalone app or a generic chatbot. They need fewer tools that do significantly more work. They need a system that closes the gap between the moment money is spent and the moment it’s reconciled across their ledger.

None of them trained for years and became certified and chartered, just to spend all day chasing receipts and updating spreadsheets.

That’s why Apron exists, and why we built William AI, which goes far beyond basic OCR data extraction. It autonomously searches connected client inboxes (Gmail or Outlook) for missing invoices and receipts, extracts data, categorises transactions based on firm-specific guidance, and publishes them straight to Xero or QuickBooks with plain-English explanations for every decision it makes.