Law firms

Privileged communication deserves better than an inbox

Identity documents, instructions, drafts and the quick client question, in one Swiss-hosted, end-to-end encrypted channel your clients open from their phone.

Built for the duty of confidentiality, not retrofitted to it.

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Art. 321
Secrecy lands on the lawyer
CHF 250,000
Personal FADP fine · Art. 62
Audit-grade
Exportable · tamper-evident
Swiss
Hosted & controlled
The problem

The most sensitive thing a client sends you arrives by email.

01

Email is the attack surface. Payment diversion, spoofed partners, intercepted bank details.

02

Consumer messengers can’t be privileged. Metadata harvested, backups outside the firm.

03

The file is whatever survived. When a regulator asks, the record is scattered across inboxes and threads.

Who carries it

Confidentiality is a criminal obligation. It lands on the lawyer.

Above the statutes: disciplinary proceedings, civil claims, and indemnity policies that exclude unsanctioned channels.

Full exposure analysis →
3 years
Custodial · Art. 321 StGB

Secrecy attaches to you, not the firm.

CHF 250,000
Personal fine · FADP Art. 62

UK: the SRA Code follows the information.

What moves into Letro

Three things every client does with you — moved off email.

01

Onboard with PostNumber

Passport verification issues a verified, permanent identity at account creation.

02

Exchange documents in a Workspace

One secure space per client and matter. Nothing travels as an attachment.

03

Advise without leaving the record

Encrypted message, voice and video. The quick question stays with the matter.

Private AI

Private AI, inside your organisation’s environment

Documents and drafts are processed in an isolated, Letro-operated European environment assigned to your firm. No client data to a third-party model, nothing used for training.

See Private AI
The architecture

Built for the regulatory context, not adapted to it.

Hosting
Swiss infrastructure, operated by a Swiss company
Encryption
End-to-end by default on the Matrix protocol; keys on your devices
Record
Exportable, timestamped, tamper-evident
Deployment
Cloud, dedicated single-tenant, or sovereign — including air-gapped

Cryptography independently audited (vodozemac, Least Authority 2022). Independent penetration test of Letro by ImmuniWeb underway — September 2026.

Request a security briefing

See where your firm stands.

نزّل التطبيق وابدأ محادثة آمنة طرف-لطرف.

حمّل تطبيق Letro
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