Brand
Rex brandand press.
Logos, colours, type and press materials for writing about Rex. Download the kit, then follow the guidelines below.
Press
Press and news. Announcements, facts and photos for writing about Rex.
For interviews, quotes or a product walkthrough, email hello@rex.inc.
Company news
- October 6, 2026Rex achieves SOC 2 Type IIRex is enterprise-grade by design, with isolated tenants, full audit logs and supervised agent autonomy, and is now officially SOC 2 Type II certified.
- September 3, 2026Rex featured in ForbesForbes featured Rex in Meet the YC startups betting on what comes next, its look at the Y Combinator Summer 2026 batch.
- July 27, 2026Rex is live on Y CombinatorOur YC launch is live. Rex is an AI service that runs order-to-cash and accounts receivable operations for enterprises, with agents that do the work and a team that approves exceptions.
- June 24, 2026Rex joins Y Combinator (S26)Rex is part of the Y Combinator Summer 2026 batch. We're building the AI operations partner for enterprise order to cash.
Fast facts
- Company
- Rex AI Ltd
- Founders
- Merlin Kafka (CEO) and Lewis Blackwood (CTO)
- Offices
- London and San Francisco
- Backed by
- Y Combinator (S26) and Vercel Ventures
- Recognition
- Vercel AI Accelerator winner, #1 of 2,500 teams
- Security
- SOC 2 Type II certified
Short description
Rex is the AI operations partner for order-to-cash. Its agents cover every account and resolve exceptions before cash gets stuck.
Long description
Rex is the AI operations partner for order-to-cash. Its agents run accounts receivable for global enterprises, covering every account and resolving exceptions before cash gets stuck.
Press photos
Naming
One name, written the same way everywhere.
The name
Write Rex with a capital R and a lowercase “ex”. The all-caps letters belong to the logo only; never type REX in running text.
Rex AI and Rex AI Ltd
Use Rex in copy. Use Rex AI only where the name needs disambiguating, such as a search title, and Rex AI Ltd in legal and financial text.
What Rex is
Rex is the AI operations partner for order-to-cash: a managed AI service for accounts receivable and order-to-cash teams. Agents run the work and your team handles judgment.
What Rex isn’t
Don’t describe Rex as a workforce that replaces people, headcount or BPOs, and don’t use “AI-powered” as decoration.
Logo
The orb and the letters, always together.
The logo is the primary identifier. Use it wherever it fits: ink on light surfaces, cream on ink or black.
Files with a background already include the logo’s clear space. Transparent files are cropped to the logo.
Logo usage
Give it room, and leave it as it is.
These rules apply to the logo and the symbol. The orb wobbles when you hover it on rex.inc; everywhere else, keep it still.
xxxx
Clear space
Leave at least the height of the orb (x) clear on every side.
65 × 21px
Minimum size
65 × 21px on screen and 20mm wide in print. Scale it only in proportion.
Don’t stretch or squash it
Don’t recolour it
Don’t rotate it
Don’t add shadows or effects
Don’t outline it
Don’t rearrange the orb
Colour
Warm cream, deep ink and a single sage accent.
Every other tone is an opacity step of ink or cream. Never use pure white or pure black as a field colour, and don’t add a second accent.
Cream
Default background
- HEX
- #FAF9F6
- RGB
- 250, 249, 246
- HSL
- 45°, 29%, 97%
- CMYK
- 0, 0, 2, 2
Ink
Text, primary buttons, dark bands
- HEX
- #04242B
- RGB
- 4, 36, 43
- HSL
- 191°, 83%, 9%
- CMYK
- 91, 16, 0, 83
Sage
The one accent: highlights and on-track states
- HEX
- #596755
- RGB
- 89, 103, 85
- HSL
- 107°, 10%, 37%
- CMYK
- 14, 0, 17, 60
Panel
Cards, inset surfaces
- HEX
- #F5F4F0
- RGB
- 245, 244, 240
- HSL
- 48°, 20%, 95%
- CMYK
- 0, 0, 2, 4
Black
Footer, darkest band
- HEX
- #0F0C0B
- RGB
- 15, 12, 11
- HSL
- 15°, 15%, 5%
- CMYK
- 0, 20, 27, 94
Warm ink
Occasional warm body text
- HEX
- #241009
- RGB
- 36, 16, 9
- HSL
- 16°, 60%, 9%
- CMYK
- 0, 56, 75, 86
Ink, on cream
Use ink at these opacities for text, borders and fills. The hex beneath each step is its solid equivalent, for print and tools without opacity.
- 100%Headings#04242B
- 80%Body#354F54
- 70%Eyebrows#4E6468
- 50%Muted lines#7F8F91
- 25%Underlines#BDC4C3
- 12%Button borders#DCDFDE
- 5%Tinted fills#EEEEEC
- 3%Panels#F3F3F0
Cream, on ink
- 100%Headings#FAF9F6
- 70%Eyebrows#B0B9B9
- 50%Muted lines#7F8F91
- 18%Button borders#304A50
- 6%Hover fills#133137
Status, in product only
- On track#596755
- Pending#F5B46B
- Error#B04A3A
For on-track, pending and error states in product mocks. They are not brand colours.
Typography
A light serif for headlines, a quiet sans for everything else.
Pair a light TID headline with a quieter GD Gaio line, and use Chivo Mono for small labels. The faces are licensed and not in the kit; use the fallbacks where they aren’t available.
TID
Display, headings and big numbers.
Cash, on time.
- Weight
- Light 300
- Setting
- Leading 1.0–1.1, tracking −1.5% to −2.2%
- Fallback
- Georgia, Times
GD Gaio
Body copy, interface and buttons.
Agents run the work across every account. Your team handles the judgment calls.
- Weights
- Regular 400, Medium 500
- Setting
- 15–17px at 1.5 line height
- Fallback
- system-ui, Inter, Helvetica Neue
Chivo Mono
Eyebrows, labels and metadata.
ORDER-TO-CASH · 0123456789
- Weight
- Regular 400
- Setting
- 10–12px, uppercase, +0.26px tracking
- Fallback
- SF Mono, ui-monospace
Scale
- Display XLTID Light · 80px · 1.0Order to cash
- Display LTID Light · 64px · 1.02Order to cash
- Display MTID Light · 54px · 1.0Order to cash
- HeadingTID Light · 42px · 1.1Order to cash
- BodyGD Gaio Regular · 16px · 1.5Exceptions are worked before cash gets stuck.
- ButtonGD Gaio Medium · 15pxLearn more
- EyebrowChivo Mono · 12px · uppercaseAccounts receivable
Shape & motion
Soft corners, hairlines and slow, small movement.
Cards · 4px
Inputs · 8px
Buttons · 10px
Corners
Small and soft: not sharp squares, and not pills everywhere.
Lines
Hairline borders in near-black at 8–12% opacity. No heavy drop shadows; one soft elevation is fine for a hero object.
Motion
Slow and small: a fade, or a 16px rise. Respect reduced-motion settings.
Voice
Declarative and concrete. One claim, then the number.
Say
- One claim, then a quantity or a time: “triaged in minutes”, “before month-end close”.
- Rex is the AI operations partner for order-to-cash.
- Agents run the work. Your team handles judgment.
- Sentence case, everywhere.
Avoid
- Rex replaces your team, your headcount or your BPO.
- “AI-powered” as decoration.
- All-caps headlines.
- Long paragraphs set in the display face.
Primary CTA
“Learn more”, which leads to booking a walkthrough.
Pairings
Cream field with ink type and a sage accent for slides, one-pagers and social. Ink field with cream type for closing frames and dark posters. An ink button for the primary action on any light surface.
Writing about Rex?We’ll help you get it right.
Email the team for interviews, quotes, product walkthroughs or anything this page doesn’t cover.