For founders and growing companies London · 02:05

An independent London studio run by Y.F. Zhang, a founder and former fintech CTO. Brand design, product development and architecture, from fifteen years of building software, much of it for regulated industries. We also make a few apps.

First project? Start with how we work
Releases All apps
Oct {D} Robin 1.0Coming soon iOS and Android · Life in the UK test practice
Oct {D} yunfeng.aiLaunch Web · the studio site, in eight languages
2026 Oct Y.F. Zhang & Co. brand system 1.0Release Brand · logo, type, artefacts, applications
Release notes are written by the person who shipped them.
Y.F. Zhang & Co.
GBP •••• 0200
YF.
FIG. 01The studio’s own brand system, 2026.
{COSX BRAND + METAROOM}
FIG. 02COSX: brand, website, Metaroom and Xeni.
Robin, Today screen
FIG. 03Robin, for iOS and Android.
01 / Services

Three ways to work with us, each priced before we start

Fixed prices, excluding VAT. 30% to start, the rest when you accept the work. Or £200 an hour. Two ways to pay
Brand. Names, identities and the rules that keep them consistent. Naming and name checksWordmark, icon, type and colourStationery, social and launch piecesGuidelines your team can use From £9,0004–8 weeks
Product. Apps, SaaS and internal tools, designed and built by the same person. Research with real usersInterface and interaction designiOS, Android and web buildsThirty days of fixes after launch From £30,0008–16 weeks
Architecture. Systems for regulated work that can show their workings to an auditor. A review of what you run todaySecurity and data protection by designAudit-ready documentation for SOC 2 and the FCACloud set-up on Cloudflare, Azure or Kubernetes From £6,0001–3 weeks
02 / Selected work

Products shipped, platforms built, brands made

All work
Design cardNodes Independent checks corro.runIn design
Corro. Product + architecture · Y.F. Zhang & Co. · 2026 Uptime monitoring checked from independent, distributed nodes.
Robin. Product · Y.F. Zhang & Co. · 2026 A study app for the Life in the UK test, designed and built by the studio.
Y.F. Zhang & Co. Brand · Y.F. Zhang & Co. · 2026 The making of this brand: the mark, the artefact system, colour, type and applications.
Metaroom. Product + architecture · COSX · 2026 to now The COSX platform where regulated firms run, review and govern their AI agents.
COSX. Brand + website · COSX · 2026 Identity and website for the agent operating system for regulated industries.
Raymond Legal. Brand + website · Client · August 2026 to now A brand upgrade and a three-language website for the UK law firm that understands Chinese business.
04 / Journal

Notes from the studio

All notes
05 / In short
Everything we make is meant to be checked: by your customers, by your auditors, and by you.