Embeddable widget

One script tag on any site

Below is a mock of a customer's marketing site. The chat bubble in the bottom-right corner is the same assistant, loaded from a single script. Works with WordPress, Webflow, Shopify or any custom stack.

<script src="https://kb.sepia.software/embed.js" async></script>

quillstack.example

Get paid faster for freelance work

Professional invoices, automatic reminders and card, ACH and SEPA payments — in one place.

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Recurring invoices

Send and charge on a schedule, with retries if a card fails.

Taxes done right

VAT, sales tax and EU reverse charge on every invoice.

Syncs with your books

QuickBooks Online and Xero, every 15 minutes.

↘ Questions? Click the chat bubble.