For independent consultants · with an AI first mate

Log the hours. Percy sends the invoice.

TentaBill turns tracked time into polished, paid invoices — and Percy, your built-in AI first mate, logs time, drafts and sends invoices, and charts your numbers, just by asking.

See how it works See a sample invoice
Free during early access · Try Percy right here — no account needed. Sign in with Microsoft 365 when you're ready.
Percy
Track→ Invoice→ PDF→ Email→ Paid
Meet Percy

Your AI first mate — not just a chat box.

Ask Percy about your time, invoices, or clients; it logs time, drafts and sends invoices, and charts your revenue — inline, in a tap. It only ever touches what you allow (read, log time, generate PDFs, send email — each behind a switch), on your own AI key or a metered managed tier with a monthly cap.

Everything an independent consultant bills with

From the first logged hour to a paid invoice.

The reminder email you didn’t want to write · the week you worked and never invoiced · the retainer cap you noticed too late.

Overdue? It gets chased.

Every unpaid invoice sits on an escalating reminder ladder — 14, 30, 45 days, or your own per client. TentaBill drafts the nudge, you approve the send, and it stands down the moment payment lands.

Invoice #1039 · Meridian Salvage Co.$1,920 · 11 DAYS OVERDUE
  • ✓ Sent — Jul 1
  • ✓ Due — Jul 15
  • ● Day-14 nudge, drafted Approve send
Payment lands → the ladder stands down.

Time tracking, minus the leaks

Log hours yourself, tell Percy as you work — or have Percy read your Outlook calendar and propose entries for the days you never logged. You confirm; nothing writes itself. Time off and holidays adjust your targets automatically.

Ready to invoice
$3,850.00
27.5 hrs · Meridian Salvage Co. · Aug 1–15
OVERDUE $1,920142 HRS THIS MONTH

Contracts that watch the cap

Give TentaBill the retainer hours or not-to-exceed from your contract and watch it burn down as you log — you’ll know you’re near the line before you cross it, not after.

Meridian Salvage · weekly retainerON PACE
31.5 of 40.0 hrs
8.5 hrs left · resets Monday

Start from the contract itself

Drop a signed contract on Percy and it reads out the client, the rate, the term, and the caps — then proposes the whole setup for you to confirm. Nothing is created without your sign-off.

Email from your mailbox

Invoices go out from your own Microsoft 365 address — your client sees you, not a billing platform, and replies land in your inbox where the conversation belongs.

Percy inside Microsoft 365

The same Percy is a Copilot agent: ask about unbilled time or draft an invoice from Teams or Outlook without opening TentaBill. Anything consequential asks first.

Plus everything you’d expect — payments and aging, versioned PDF invoices, templates with your logo, exports and backups, holidays and time zones.

“Acme goes to $165 on Jan 1.”Schedule the rate change today — unbilled work reprices from that date, and invoiced history never moves.
INT-0826-0001Invoice numbers your way — one global format, per-client overrides, and your existing sequence carries on.
Every version, keptInvoices freeze as sent — revise all you like, history never changes under you.
Drafts, never surprisesRecurring billing creates a draft and tells you — it never emails a client on its own.
The Copilot agent

Percy answers where you already work.

TentaBill ships as a Microsoft 365 Copilot agent — the same Percy, inside Teams, Outlook, and Copilot chat. No tab to open, no second sign-in: your Microsoft login is the login.

  • ✓ Ask about unbilled time, overdue invoices, or a client — real figures, straight from your workspace.
  • ✓ Draft and send invoices without ever opening TentaBill.
  • ✓ Same guardrails as the app: consequential actions show an approval card — nothing bills or sends without your click.
See it for yourself

A real invoice, not a mockup.

This is an actual TentaBill PDF — serif document body, a clean line-item table, and your logo in the masthead when you have one. Judge the output, not the pitch.

Download a sample invoice
How it works

Four steps to your first invoice.

1

Sign in with Microsoft 365

No signup, no passwords — your workspace and invoice email are ready the moment you land.

2

Drop in your contract

Percy reads it and proposes the whole setup — you, your client, the rate, the caps. You confirm, and the account stands. No forms.

3

Say “log 6 hours on the sonar survey”

Tell Percy as you work, paste a week of hours from anywhere, or use the grid yourself — and Percy flags any weekday you forgot to log.

4

Say “invoice Meridian for July”

Your logged hours become a polished PDF, sent from your own mailbox once you approve — then the reminder ladder watches it until it’s paid.

Percy needs AI switched on — our managed tier or your own key. Prefer to drive? Every step has a manual path: forms, buttons, no AI required.

✓ No passwords, ever

Sign in with Microsoft 365. TentaBill stores no passwords and never sees your credentials.

✓ Your workspace is yours alone

Nobody else's data ever crosses into your account, and your keys are encrypted and never shown again.

✓ Percy on your terms

Bring your own AI key or use a metered managed tier with a monthly cap. Percy only touches what you allow — every capability is a switch.

Curious? Ask Percy anything.

No account needed to try the demo — see how it thinks before you ever sign in.

Chat with Percy