Privacy-first AI infrastructure.

Use any AI. Leak nothing.

Velum masks personal data before it reaches the model, then puts it back in the reply. Entirely on your machine. It makes no network calls while it works.

⟦PERSON_1⟧, NIF ⟦DNI_NIF_1⟧, ⟦ADDRESS_1⟧, Barcelona.

reversibleno network at runtimeruns on your device7 days free, no account

DownloadHow it works
Privacy by Architecture

Privacy
that stays
with you.

Velum runs locally on your device. Your data is never stored, never logged, never sent anywhere. The model works on masked text, and you get the real answer back.

“Your data is yours. We made it impossible for us to see it.”

See it in action

Mask.Send.Restore.

01What you were going to send

María García called about the inheritance of €200,000. Her NIF is 12345678Z and her email is [email protected]

Works with any AI assistant

The desktop app masks before you paste, so it works anywhere you can paste. The browser extension integrates in-page with ChatGPT, Claude and Gemini.

ChatGPT
Claude
Perplexity
Gemini
Gemini
Copilot
Copilot
Grok

Get Velum

Seven days free, no account and no card. After that a licence key keeps masking on. Unmasking is never gated, so anything you have already masked stays readable.

Available

Browser Extension

Chrome & Chromium

Masks what you type in the page, before it reaches the chat.

Download

v0.6.0 · 151 MB · unpacked

Available

Desktop App

macOS (Apple Silicon)

Masks text, files and whole folders. The full engine runs on your Mac.

Download

v0.7.0 · 320 MB

Coming soon

Atlassian App

Jira & Confluence

Finds and masks data at rest in your tenant. Runs on Forge, so no vendor server is in the path.

Available once review completes

Free for students, educators, researchers and non-profits. Buying one for a company is not self-serve yet. email us and we will invoice you directly.

Zero Trust by Default

Your data never leaves your machine.

lsof -i -P | grep -i velum
127.0.0.1:54312 (LISTEN)

One loopback socket, so the app can reach its own engine. It is bound to your machine and cannot be reached from the network.

Velum
Infrastructure

No vendor servers

Nothing to host. Nothing to configure. Nothing to maintain.

ls ~/Library/Application\ Support/velum
no credentials, no tokens

There is no account to breach or subpoena. A licence key sits in your Keychain and is verified offline.

Velum
Identity

No accounts

No sign-up. No login. No identity tied to your data.

DevTools › Network — mask a document
0 requests

Masking runs on your machine. Pull the cable and it keeps working. Only the larger optional model needs a download.

Velum
Processing

No cloud processing

All computation happens on your device. Period.

Little Snitch — use the app for an hour
no outbound connections

The app keeps a usage log on your own disk, with no personal data in it. Nothing uploads it. Delete it any time.

Velum
Telemetry

Nothing phoned home

No profile. No usage sent anywhere. Your work stays yours.

Built for people who care

For individuals.For builders.For teams.

From a solo professional to an entire firm. If you work with information you can’t afford to leak, Velum lets you use AI and keep every private detail to yourself.

Request a demo

See it work on your own data.

Tell us what you are working with and we will walk you through it on your own data. Nothing leaves your hands.

Your details mask themselves as you go. That is Velum, running in this page. Press the eye to unmask. We still receive them in full.

We respect your privacy. Your details are only used to reach you.