PenaltyProof
LiveFiling-deadline alerts for UK accountants — monitors Companies House, VAT, payroll and Self Assessment deadlines and warns 30, 14 and 7 days before they're due.
For UK accountants & bookkeepers
Theo Chavannes · Founder of Chavannes Ltd
I build quiet software for UK professionals.
Independent SaaS tools that each watch one expensive-to-miss obligation — a filing deadline, a credential expiry, a statutory clock — so the person responsible doesn't have to. Based in London.
Products
Five tools · five problemsCoverProof
LiveSection 250 compliance for FCA-regulated UK firms — SM&CR gap analysis, zero-login declaration cycles and board-ready evidence packs.
For FCA-regulated UK firms
StaffClock
LiveStaff credential expiry tracking for UK businesses — right-to-work checks, CSCS cards, DBS checks and SIA licences, with escalating reminders before expiry.
For UK small & medium employers
FixRoute
LiveProperty repair management for self-managing UK landlords — tenants report repairs via a shareable link, contractors get scoped job links.
For self-managing UK landlords
EvidenceTrail
Live (early)Awaab's Law evidence packs and statutory-clock tracking for UK registered housing providers, alongside their existing repairs system.
For UK registered housing providers
About
One founder, five focused tools.
I'm a French software founder and machine-learning engineer living in the UK. I run Chavannes Ltd (UK company 17198260, incorporated May 2026), an independent software company with no outside funding. Each product does one specific compliance or operations job for a clearly named UK audience — accountants, FCA-regulated firms, small employers, landlords and housing providers — and does it properly, rather than trying to be a platform.
I started building these tools in 2026, after years working as a machine-learning engineer. The pattern behind all five is the same: a specific UK regulatory or operational obligation, a deadline or expiry that's expensive to miss, and a small tool that watches it so a busy professional doesn't have to. Everything is designed and built by me, end to end.
If you'd like to get in touch, email theo@chavannes.ltd or find me on LinkedIn.