LaSi

When they take your phone, they read nothing.

LaSi encrypts your conversations the way good messengers do, and it also protects the phone once it leaves your hand. The vault's key lives only in memory and is gone when the app locks.

Coming soon to the app stores

What's different

A seized phone

With the app locked, your conversations, contacts and keys stay encrypted. The key never goes to disk or to the system's keychain.

Duress password

If someone forces you to open the app, a second password opens a decoy vault and wipes the real one. If you want, it also quietly alerts your trusted contacts.

No phone number

Nobody needs your number to reach you. Contacts add each other with a card or a QR code.

A server with no disk

The relay keeps messages only in memory until they're delivered, and writes nothing to disk. It works over Tor too.

What LaSi doesn't protect

  • A phone taken with the app open, before it locks.
  • Spyware installed on the device beforehand.
  • The other side: what your contact keeps, shows or leaves on their phone.

LaSi hasn't had an external audit yet. It comes before the public release.

Your own relay

By default everyone uses LaSi's relay. A family, an office or a company can have a relay of its own: the metadata of who talks there never mixes with anyone else's.

Managed relay

We run the server. Brazil first; other countries later.

  • Ready to use: in the app, type the relay's address and confirm.
  • The license renews by itself.
  • Nothing on disk, like LaSi's relay.
  • No Tor yet: people in Tor mode can't reach this relay.

Price coming soon

I want a managed relay

License for your own relay

For those who already have a server and want to run LaSi's relay on it.

  • The setup guide comes with the license.
  • The license renews by itself while your plan is active.

Price coming soon

I want a license

With either one, iPhone notifications go through LaSi's relay, without the message, and if the plan lapses the relay keeps going for 30 more days, then stops working in the apps. A managed relay keeps each client's metadata apart, but it runs on a LaSi machine: a breach of that machine, or an authority's request to LaSi, reaches every relay on it. To keep the metadata on a machine of your own, run your own relay.

Verified professional seal

Against the fake-lawyer scam: LaSi checks the professional's registration on a video call, with their council ID card, and signs a seal bound to their key. Clients see the verified sign next to the name, and a tap shows the registration.

Lawyers (OAB, Brazil)

The Brazilian bar first. Doctors (CRM) and psychologists (CRP) follow, with the same process.

Price coming soon

I want the seal

Get it

LaSi isn't in the stores yet. When it is, the links show up here. Relays and the seal are sold only on this site.