A quiet charge became the spark.
Subproof started with the familiar frustration of forgotten subscriptions, free trials, and payments that renew before you remember them.
Founder story
Built by someone who needed it first.
Subproof was created independently by Christian Alexander Koumandaros, a 19-year-old developer building a calmer way to remember payments, warranties, renewals, and agreements.
The path
From surprise charges to a privacy-first product.
Accessibility shaped the product.
Being hard of hearing made clarity, calm interfaces, and trustworthy systems feel non-negotiable. The product had to reduce noise, not create more of it.
Built independently from the real problem.
Subproof was designed and developed by one person, not a committee, with every screen aimed at solving the problem firsthand.
Privacy became the line.
No ads. No selling data. No pretending financial memory needs to become financial surveillance.
Founder journey
Clear information became the design philosophy.
Being hard of hearing taught Christian how much good systems matter. Subproof is built around that same idea: reduce the noise, surface what matters, and make the next action obvious.
The problem was personal.
Like a lot of people, Christian signed up for free trials and services that seemed harmless at the time, then later got charged for something he had completely forgotten about.
The answer had to feel calm.
He wanted one simple place to track subscriptions, warranties, recurring charges, and important agreements without another confusing dashboard.
The product became proof.
Subproof gives people a reliable record of the payments and commitments they make, so nothing quietly slips through the cracks.
Mission and future
A financial memory system that stays on your side.
The future of Subproof is simple: help people avoid surprise charges, stay organized, and understand every payment commitment without selling their attention or their data.
Privacy first
Your data stays yours.
Human built
Made from the real problem.
No clutter
Only what helps you act.
Thank you for being here and supporting an independent project.
Christian Alexander KoumandarosFounder, Subproof