Business accounting · MCP-compatible

Books that stay ready for the next question.

Run invoices, bills, bank review, and financial reports on a real double-entry ledger. Bring Claude or ChatGPT into the workflow with role-scoped access and a complete audit trail.

  • Double-entry enforced at posting
  • Role-scoped AI access
  • Reports derived live from the ledger

Vela Robotics

Dashboard

Cash on hand

$487,200

Income

$439,200

Runway

22 mo

Outstanding

$52,800

Recent journal entries

  • JE-2026-0118Bank feed · Software & subscriptions129.00Posted
  • JE-2026-0117INV-1049 · Globex8,400.00Posted
  • JE-2026-0116Bill · Amazon Web Services1,912.40Posted
  • Reports calculated live from posted entries
  • Corrections by void & reversal, never silent edits
  • AI actions tagged on the audit trail
  • Bank review tied back to the ledger
The accounting cycle

Sales, bills, banking, and reports — one ledger under all of it.

The daily work of running business books, each workflow backed by real double-entry postings.

  1. Get paid

    Invoice customers, track who owes you.

    Northstar Inc. owes $14,500 on INV-1048 — Comma flags it before it's late.

    Sales
  2. Pay bills

    Track what you owe, never lose a bill.

    AWS, GitHub, WeWork — every vendor bill in one place, due dates included.

    Purchases
  3. Know your numbers

    P&L, Balance Sheet, and Trial Balance, straight from posted entries.

    Runway, cash on hand, and outstanding AR — the whole business on one dashboard.

    Reports
  4. Stay audit-ready

    A real chart of accounts, journal entries, an immutable trail.

    Void a posted invoice by mistake? It reverses through a linked journal entry.

    Ledger
  5. Let AI help

    Connect Claude, ChatGPT, or Claude Code.

    Same role-based access a human teammate would have — nothing more.

    MCP
See it in action

A real look at the product.

Dashboard, sales, bank review, and financial reports — the screens that keep the books moving.

Your whole business at a glance — cash, income, runway, and what needs attention.

Vela Robotics

Dashboard

Cash on hand

$487,200

Income

$439,200

Runway

22 mo

Outstanding

$52,800

Recent journal entries

  • JE-2026-0118Bank feed · Software & subscriptions129.00Posted
  • JE-2026-0117INV-1049 · Globex8,400.00Posted
  • JE-2026-0116Bill · Amazon Web Services1,912.40Posted
New · MCP connector

Run your books by just asking.

Comma is a remote MCP server. Connect an assistant and it can read business reports, categorize bank activity, draft invoices, and reconcile your books — never more than your role allows.

  • Works with Claude, ChatGPT, and Claude Code — any MCP client
  • Scoped to the role of the person who connected it — never more
  • Every change logged in your audit trail, revocable in one click
Works withClaudeChatGPT
Start free

You ask

“Categorize this month’s bank feed.”

Comma posts

JE-2026-0118Balanced · Posted
AccountDrCr
5300 · Software & subscriptions129.00
1000 · Chequing129.00
Totals129.00129.00
https://trycomma.app/api/mcp

Add this URL as a custom connector in Claude or ChatGPT — access stays scoped to your role, and every action lands on the audit trail.

Up and running today

Three steps to books that stay ready.

No migration project, no consultant, no month-long setup.

  1. Set up your books

    Add your company and chart of accounts, invite your team, and connect Claude or ChatGPT — each with the right role.

  2. Run the daily money work

    Invoice customers, capture bills, and review bank activity. Your assistant can help, but you stay in control of what posts.

  3. Close with live numbers

    P&L, Balance Sheet, Trial Balance, and the audit trail update from the same posted entries — no second set of numbers to reconcile.

Built on trust

Real controls, not a checkbox.

Exactly what protects your books when a human or an AI touches them — actual product behavior, visible in your own Settings → Audit Logs.

Role-based access, enforced live

Four roles: admin, accountant, member, viewer. Every action — human or AI — is checked against your current role, every request. Change someone's role, or disconnect an assistant, and it applies to their very next action, not eventually.

Every change is logged, including the AI's

Settings → Audit Logs records every change to your books. Actions taken by a connected AI assistant are tagged distinctly, so you always know whether a human or an assistant made a change.

Revocable, always

Disconnect a connector and its access is cut off immediately — every active session stops working, and it must go through the full connection flow again. Nothing in your books changes.

Consent, every time

Connecting an AI assistant always shows an explicit approval screen naming exactly what it's asking for and which company. Never silent, even on your second connection.

The ledger can't be silently rewritten

Debits and credits must balance before anything is written — the server posting chokepoint refuses an unbalanced entry. Corrections happen by voiding and reversing, never by editing history.

What we don't claim yet

We haven't pursued SOC 2 or ISO 27001 certification. What's here is what you can see directly in the product today — not a badge, the actual mechanics.

Simple pricing

Free while we're in beta.

We're not charging yet. When we start, you'll get advance notice and a locked-in early-adopter price.

Founding member offer

$0/ month

while we're in beta

We're not charging yet. When we start, every founding member gets advance notice and a locked-in early-adopter price — never a surprise bill.

Everything included

  • Every business-accounting workflow and report
  • Business bookkeeping through the MCP connector
  • Unlimited invoices, bills, and journal entries
  • As many teammates as you need, each with their own role
Start free

No credit card required.

FAQ

Questions businesses ask.

comma,

Give your AI a real ledger to run.

No credit card · Free while we're in beta