Firmowid

Firmowid is an open-source (AGPL-3.0) web app for small service businesses that bill for their work. It keeps invoices, bank payments, team hours and project results in one place, and lets AI agents work with that data. It is available in every country. Companies in Poland also get built-in KSeF, the Polish national e-invoicing system.

Invoices

• Sales invoices with corrections, PDF and 33 currencies. EU B2B clients get the right VAT setting automatically.
• Cost invoices added from PDF, photo or OCR scan (and pulled from KSeF automatically in Poland).
• Monthly ZIP package for your accountant.

Bank

• Read-only bank connection through GoCardless (PKO, Pekao, mBank, ING, Revolut, Wise, Stripe, PayPal and more).
• Payments are matched to invoices automatically. Unclear cases go to review.

Team and time

• Time tracking per project, monthly timesheets in PDF.
• Project cost from hours times rate, salary from hours, payroll report in CSV.
• Leave requests, business trips, employee documents, roles for admin, accounting and staff.

Project profitability

• Revenue, costs and net result month by month and per project.
• Company costs, taxes and salaries split across projects by hours, so you see which project really makes money.

AI and MCP

• MCP server for Claude, Cursor and other AI tools, plus a ChatGPT app. Agents can draft and issue invoices, match payments, start and stop time tracking, read cost invoices and handle leave requests.
• Built-in AI assistant that answers questions about your company data and can issue invoices.

Free plan with unlimited invoices. Paid plans from 29 PLN per month. Self-hosting is possible (AGPL-3.0). Hosted in the EU. Interface in English, Polish and Ukrainian.

Not included: bookkeeping, tax returns, full payroll, inventory.