Invoicing, in color
Invoices, without the invoice software.
FluxFina is invoicing for one-person operations and small teams. Tax-clean records, automatic recurring, no clutter. Built so you can send the invoice and get on with the actual work.
No credit card. Free while in early access.
Recent activity
May 2026
2026·05·26
INV-2026-0142
$5,200.00
2026·05·19
INV-2026-0141
$1,800.00
2026·05·12
INV-2026-0140
$3,400.00
2026·05·05
INV-2026-0139
$600.00
Outstanding
$0.00
Why people switch
Built around the parts of invoicing that actually cost you time.
Tax-clean by default
Gapless numbering, frozen snapshots at finalize, immutable PDFs. The boring bits an auditor cares about, handled.
Recurring on autopilot
Weekly, monthly, quarterly. Optional auto-send so the invoice lands in your client’s inbox before you remember it exists.
Built to get out of the way
No upsells. No dashboards that bury the action. The interface ships the invoice and closes the tab.
How it works
Three steps. No tour, no tutorial, no “getting started” checklist that lives forever in your sidebar.
01
Add a client
One row, one minute. Or skip it for a one-off invoice and use the inline Bill-To. Whatever fits the job.
02
Build the document
Line items, adjustments, custom fields, a logo if you have one. Autosaves on every keystroke.
03
Finalize and send
One click. The PDF is frozen, the gapless number is allocated, the email lands with a public link the recipient can pay.
Free during early access
Send the invoice. Close the tab.
Built for one-person operations and small teams. Free while we’re in early access. No card, no contract, just an account you can walk away from any time.
Start free