Own your business. Don't rent it.
LockMargin is a local Financial OS for freelancers who want their data private, immutable, and fully under their control — with no internet dependency, no hidden algorithms, and no monthly payments.
$49 one-time. No subscription. No account.
$49 one-time · No account required · Local-first by default · Your data stays yours forever
The Rent Trap
You don't own your business if you rent the tools that run it.
ANNUAL RENTAL RECEIPT
What you own at the end: nothing
Stop for a second. If you stopped paying tomorrow, how much of your business could you still run? How many client records could you access? How many invoices could you prove you sent?
Read The Ownership Manifesto →The Ownership Stack
Ownership isn't one thing. It's a stack. You don't truly own your business until you own every layer.
Most freelancers own the top two layers and rent the bottom four. That's backwards. You can't build sovereignty on someone else's foundation.
Why LockMargin?
We didn't set out to build "invoicing software." We set out to build a tool that respects the Ownership Stack — every layer of it.
Offline by default
Your data lives on your machine. Not because we promise to be good. Because the software has no mechanism to send it anywhere. Network-free by default. No telemetry. No cloud endpoints.
Pay once, own forever
$49. One time. No subscription. No hidden tiers. No surprise price hike in 18 months. You bought it. It's yours.
No account required
We don't know your email. We don't have a database of users. We don't own your identity. You don't need our permission to use software you paid for.
Immutable records
Ownership of your records means you can prove what you sent. No he-said-she-said. No missing history. Snapshot billing creates an exact, unchangeable record of what was agreed.
Open format
SQLite. JSON. CSV. Your data is not locked in a proprietary vault. Any tool can read it — today, tomorrow, in ten years. Even if LockMargin disappears.
The data layer is open source: schema, export and decryption tools are public. Your file opens with your password and any tool - not only mine.
Traceability
Every action leaves a trail you control. Not a log file on someone else's server — a record you can hold in your hand, inspect, archive, or present to a tax authority.
How it works
- Download and open. No account, no email, no setup wizard. Install and work.
- Run your business. Clients, hours, invoices, expenses — one encrypted database file on your machine.
- Stay free to leave. Export SQLite, JSON, CSV, or PDF anytime. Your data leaves only when you say so.
Unplug the cable. Nothing changes.
Track time, write invoices, export PDFs with the internet off. Offline is not a feature here. It's the default.
The Landlord Test
Before you adopt any new tool, ask these five questions. They're uncomfortable because they're supposed to be.
- If the company shuts down tomorrow, can I still access my data in a usable format?
- Can I open my files without their software, their servers, or their permission?
- If they double the price next month, do I have a real alternative — or just the pain of migration?
- Do I know exactly where my data is right now, physically?
- Can I prove what I sent, what was agreed, and what was paid — without asking them for a copy?
If you answered "no" to any of these, you're renting. Not using. Renting.
Freelancers who refuse to rent
Verified feedback from real users appears here after Early Access. September 2026.
Frequently Asked Questions
What happens to my data if LockMargin disappears?
Nothing. Your data lives in a file on your machine, in open formats (SQLite, JSON, CSV). Any tool can read it. You don't need us to keep your business running.
Do I need an account?
No. No email, no registration, no login. Download, install, work.
Does it work offline?
Yes. Offline is the default, not a mode. There is no cloud to connect to.
What does the free tier include?
Start is free to try — up to 5 clients, 5 projects per 30 days, unlimited invoices. No credit card required.
Can I move my data to another tool?
Yes. Export SQLite, JSON, or CSV anytime. No lock-in, by design.
What if my computer dies?
Your backup, your rules. The database is one file — copy it to any drive. LockMargin never phones home, so backups are yours to manage.
Is there a subscription?
No. Standard is $49 one-time. Major upgrades (v2.x) are 50% off for Standard users.
Stories from the build
Stop renting your business. Own it.
Your data. Your tools. Your business. Offline by default.
$49 one-time · No account required · Local-first by default · Your data stays yours forever