We reverse the contract.
Your tools should not cost you a lifetime rent. They should not host your data 2,000 kilometers away either. Here is what we stand against, and what we defend.
What we have normalized
Three things that should not be normal.
Pay more, every year
A subscription invoicing software grows by 8% per year on average. Over 10 years: +115%.
Wait for updates
You discover new features when the editor ships them. You have no say.
Stack up accounts
1 account per tool, 1 password, 1 2FA, 1 subscription. For 1 person.
Cumulative cost of an average invoicing subscription
Estimated at EUR 35/month with +8% yearly increase
“When you buy a Cahier Autonome, you buy a file. Not an access. A file.”
What we defend
Three principles, non-negotiable.
Real ownership
You buy the file. Nobody can take it back. No forced price hike. No possible service shutdown.
Data privacy
Your clients, your invoices, your tax records: all stays on your machine. No third-party server. No unintended sharing.
Radical simplicity
If you can open a PDF, you can use a Cahier Autonome. No 200 screens, no 50 hidden settings.
How it is built
A deliberately minimal stack.
01
A standalone file
Everything is embedded: UI, business logic, styles, fonts. The same format as the web pages you read every day.
02
Local browser storage
Your entries live in localStorage. No outbound connection. No server involved.
03
JSON and PDF export
At any time, you export your data in readable, transferable, archivable formats.
04
20-year compatible
This format is the most backwards-compatible on the web. The file will work in 5, 10, 20 years.
For whom
Built for those who want to stay in control.
Freelancers, small businesses, regulated professions. Anyone running their activity with a few precise tools and tired of renting them every month.
Our commitment
We commit to not owning you.
Coherent with what we just read?
Invoice Studio is the first concrete application of the manifesto. Quotes, invoices, payments, profitability — forever.