Velum for desktop
macOS and Linux, Windows coming
Text, files, folders, and what your coding agent reads.
Seven days free, then a licence key.
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
Also for Firefox and Edge, and the desktop app.
Privacy by Architecture
Privacy
that stays
with you.
Your documents, and the mapping back to the real values, stay on your machine. The model works on masked text; 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 maria@garcia.com
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.
Sending clean masked text instead of a raw PDF also costs an LLM 65 to 90 percent fewer input tokens. See the numbers.
ChatGPT
Claude
Perplexity
Gemini
Copilot
Grok
Get Velum
Pick the one that sits where your data is.
Velum Lite
Chrome, Edge, Chromium and Firefox
Paste, mask, copy, next to any web chat.
Text masking free forever. A licence adds files and the in-page button.
Velum Privacy for Atlassian
Jira and Confluence Cloud
Finds what is already in your instance and masks it in place.
Licensed through the Atlassian Marketplace listing.
For individuals
Seven days free on desktop, free forever for text in the extension, then one licence unlocks both.
See pricingFor teams
Deploy through your MDM, hand out and take back seats, hold everyone to one signed policy.
Velum for organisationsStudents, educators, researchers and non-profits can request a free licence.
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, bound to your machine and unreachable 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
Nothing to breach or subpoena. The licence key sits in your Keychain, verified offline.
Velum
Identity
No accounts
No sign-up. No login. No identity tied to your data.
DevTools › Network — mask a document
0 requests
Pull the cable and it keeps working. Only the 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
update and licence calls, nothing else
Update and licence checks on launch. None of them carries your work.
Velum
Telemetry
No telemetry
No profile. No analytics. Nothing about your work is sent anywhere.
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 work with and we will walk you through it on a call, on your own files. Nothing leaves your machine while we do.
Your address is used to reply to you, and for nothing else.