For freelancers, studios and agencies

Back office.
Clicks optional.

Back office tools reimagined: time, invoices, dunning, receipts and books in one easy to use app or integrated into the AI tools you’re already using.

Invoices. A week of hours becomes a sent invoice, then a paid one. A few clicks, start to finish.

Freelancers, studios and agencies run their back office on Backbone.

  • Hosted in the EU
  • GoBD-compliant invoices
  • §14 UStG check
  • Roles & permissions
  • Billy and Sort Invoices are now Backbone

Flexible solutions for modern business challenges. Grow your business with a sleek set of back office tools – designed to work where you want them to work.

Use all tools within your favorite AI environment

Built for

  • Claude
  • ChatGPT
  • Gemini
  • Grok

Send invoices that get paid

Hand your bookkeeper clean books

Track time on every client

Let receipts match themselves

Let late invoices chase themselves

See what each client is worth

Ask Billy to do the work for you

Connect your agents via MCP

Start on your own with the hours, invoices and receipts of a single client, and keep the same workspace as you add clients, teammates and a bookkeeper. Backbone takes care of the repetitive work, from invoices to reminders to month-end, so you always see where your business stands and can grow at your own pace.

Your day in one line

Overdue invoices, hours not yet billed and documents waiting for you, each one a click away.

Overdue · 2 invoices€5,458.00

Ask, and it is done

Type "Who hasn't paid yet?" or "New invoice for Kinetik Studio" and Backbone works on your real numbers.

Outstanding · 4 invoices€12,001.00

Your evenings are yours again. Invoices, reminders, receipts and the month-end export happen in the background.

  • Hours that bill themselves. Every minute you track is already on the next invoice, at the right rate and with the right VAT.

    From hours to invoice
  • Books ready when your bookkeeper asks. Receipts find their payments as they come in. Month-end is one ZIP, named and sorted the way your bookkeeper likes it.

    How the export works
  • Hand the admin to your AI. Ask Claude, ChatGPT, Gemini or Grok to log time, draft the invoice or find who still owes you. You confirm, Backbone does the rest.

    Connect your AI

Backbone for freelancers, studios and agencies

Create a foundation for your startup that enables faster growth

Track the hours, send the invoice, drop in the receipts. Backbone keeps the paperwork in order, so your time goes to clients instead of admin.

Shared projects, live budgets and one invoice for the whole team's hours, with roles that keep everyone to their own time.

See profitability and utilisation per client, keep many projects tidy in one workspace and give your bookkeeper a login of their own.

Start now
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12.50 h ready to bill

This week's hours for Kinetik Studio are one click away from a draft invoice.

Kinetik Studio · €95 / h€1,187.50

Budget at 92 %

You see the relaunch getting tight on the project itself, not on the invoice afterwards.

Nordlicht · 4 people tracking6 h left

Your best client per hour

Kinetik Studio, after every tracked minute and every invoice in September.

Effective rate · September€101.35 / h

Choose your path. Click through the app, ask from your AI tool or bring it into your coding setup.

Just use the app. Time, invoices, dunning, receipts and books in one fast, calm workspace. Nothing to set up and nothing to connect.

See it in action

Use it from your AI. Add Backbone to Claude, ChatGPT, Gemini or Grok as a custom connector. Nothing is sent without your OK.

Connect your AI

For builders. Add the same MCP connector to Claude Code and other coding tools. A public API and a CLI are coming soon.

See the builder options

Get back office tasks done faster and more reliably.

Challenges every founder and business knows.

I forget to log my hours.

A timer that is always one click away

Start it from the top bar, the Mac menu bar or a quick message to your AI. Every minute lands on the right client.

I write invoices in Word.

Invoices built from your hours

Billable time becomes line items with the right rate and VAT, checked for every mandatory detail. You edit it right on the page.

I chase payments by hand.

Reminders that go out on their own

A friendly reminder first, firmer notices later, and it all stops the day the payment lands. Or ask "who still owes me?".

My receipts live in a shoebox.

Drop them in. They match themselves.

Upload PDFs and photos once. Each receipt is read, renamed and matched to the payment behind it.

My bookkeeper waits for me every month.

One click, one ZIP

Invoices, receipts and statements in the folder tree your bookkeeper asked for, with a list of what is still open.

Connects to what you already use. Your AI tools, your bank, your bookkeeper and your clients. Backbone sits in the middle and keeps every record in one place.

Backbone

Your AI tools

  • Claude
  • ChatGPT
  • Gemini
  • Grok
  • Backbone connector (MCP)

Your bank

Upload the statement your bank already gives you.

  • Statements · PDF or CSV
  • Automatic bank connectionComing soon

Your bookkeeper

Month-end in one file, or a login of their own.

  • Export ZIP
  • Share link
  • Bookkeeper role

Your clients

Invoices and reminders go out from Backbone.

  • Invoices and reminders by email
  • E-invoice (ZUGFeRD)

Desktop timer

Start and stop the timer from your Mac menu bar.

  • Mac app · time tracking

Your own setup

For developers and agencies.

  • MCP in Claude Code and coding tools
  • API & CLIComing soon
  • Your data stays in the EU

    Hosted in the EU, encrypted, and kept strictly apart from every other workspace.

  • Nothing goes out without your OK

    Roles apply to people and AI alike. The assistant drafts; you confirm before anything is sent.

  • Invoices you can trust

    Checked against §14 UStG before sending. Once sent, the PDF is written once and never changes (GoBD).

What's happening
The latest from Backbone.

Ready to get started?

Start the trial and send a real invoice today. Connect your AI tool whenever you like.

7 days free, card required. €0.00 due today.

See what you'll pay

Three plans from €19 a month, VAT included. 2 months free with yearly billing.

Pricing

Connect your AI

Add Backbone to Claude, ChatGPT, Gemini or Grok in a few minutes.

Setup guideComing soon