Themes

Recolour a finished page. Keep the kit.

The same Free page under Kiln and Slate. Tokens change. Markup does not.

Open Free homepage Open live preview

How theming works

Four plain steps. Same components at every step; only the look changes.

Colour and type

You control the pigments and fonts the whole kit reads from.

Light and dark

Switch appearance (and density if you need it) without a second component set.

Your brand

Apply your look once; buttons, forms and pages pick it up together.

Live preview

Try another look on the same UI before you commit a rebuild.

Brand packs

Ready-made faces you can try. Kiln is this site. Open the live preview to switch light and dark.

Kiln

This site. Warm accent on a clear canvas.

Slate

Cool grey for product and ops surfaces.

Sage

Soft green for calmer editorial looks.

Indigo

Blue accent when you want a sharper signal.

Same page, two brands

A Free page under Kiln and under Slate. Open the full Free homepage, or the preview for light and dark.

Kiln

Invoicing

Invoicing that chases itself

Northwind raises your invoices, sends the reminders, and tells you who is about to pay late. You do the work. It does the asking.

Start free trial Book a demo

Trusted by finance teams at

Everything the chasing needs

The parts of getting paid that nobody wants to do by hand.

Automatic reminders

Send a clear follow-up before an invoice becomes awkward.

Due-date planning

See which invoices need attention before the week closes.

Payment matching

Keep paid invoices visible beside the work that remains.

Built for the boring half of getting paid

See what changes in the first quarter

Most teams cut days-to-pay without hiring anyone. Start free, import when you are ready.

Start free trial Talk to us

What changes in the first quarter

Average time to pay 21 days 17 days faster than last quarter

Invoices paid without a call 94% 6 points higher than last quarter

Saved each week 3 hours one hour more than last quarter

What finance teams say after a quarter

We cut our average days-to-pay from 38 to 21 without hiring anyone. The reminders just go out.

Priya Raman Finance Director, Halden Group

I imported two years of invoices on a Tuesday afternoon and the first reminders went out that evening. There was no implementation project.

Daniel Okoro Head of Operations, Cransley Freight

The thing I was worried about was sounding aggressive to customers I like. It stops the moment they pay, so nobody has been chased for an invoice they already settled.

Marta Lindqvist Owner, Lindqvist Joinery

Stop writing chase emails

Free for 30 days. No card, no setup call, no data import to sit through.

Start free trial Book a demo

Slate

Invoicing

Invoicing that chases itself

Northwind raises your invoices, sends the reminders, and tells you who is about to pay late. You do the work. It does the asking.

Start free trial Book a demo

Trusted by finance teams at

Everything the chasing needs

The parts of getting paid that nobody wants to do by hand.

Automatic reminders

Send a clear follow-up before an invoice becomes awkward.

Due-date planning

See which invoices need attention before the week closes.

Payment matching

Keep paid invoices visible beside the work that remains.

Built for the boring half of getting paid

See what changes in the first quarter

Most teams cut days-to-pay without hiring anyone. Start free, import when you are ready.

Start free trial Talk to us

What changes in the first quarter

Average time to pay 21 days 17 days faster than last quarter

Invoices paid without a call 94% 6 points higher than last quarter

Saved each week 3 hours one hour more than last quarter

What finance teams say after a quarter

We cut our average days-to-pay from 38 to 21 without hiring anyone. The reminders just go out.

Priya Raman Finance Director, Halden Group

I imported two years of invoices on a Tuesday afternoon and the first reminders went out that evening. There was no implementation project.

Daniel Okoro Head of Operations, Cransley Freight

The thing I was worried about was sounding aggressive to customers I like. It stops the moment they pay, so nobody has been chased for an invoice they already settled.

Marta Lindqvist Owner, Lindqvist Joinery

Stop writing chase emails

Free for 30 days. No card, no setup call, no data import to sit through.

Start free trial Book a demo

Open full preview for light and dark

Need token tables? Theming guide in Docs

Copy a page under this look.

Templates stay the shop. Docs theming shows how to author a pack.

See templates Theming guide