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Platform

Key featuresWhat you can do with Letro Why Letro?Compared with email, post and chat Private AISelf-hosted models in an isolated environment DownloadiPhone, iPad, Android and web app

Deployment

CloudShared Swiss infrastructure, operated by Letro DedicatedA single-tenant server for your firm alone SovereignYour own server, on your infrastructure. Air-gap capable

Founding offerFirst 3 months free on every tierApply as a founding firm →

By industry

Wealth & Asset ManagementEAMs, family offices and asset managers Law FirmsClient matters, documents and instructions Fiduciaries & TrusteesSettlors, beneficiaries and co-trustees

Workflows

Client onboarding & KYCDocument exchangeClient instructions & approvalsAudit-ready archivingSecure external collaborationSecure internal collaboration

Replace your channel

Postal mail alternativeWhatsApp alternativeMicrosoft Teams alternative

How it holds up

Matrix protocol & federationEnd-to-end encryption on an open standard PostNumber identityOne passport-verified identity per person Data sovereignty & residencyWhere your data lives, and who governs it

Deployment & compliance

Private & air-gapped deploymentMatch the deployment to your risk profile Regulatory alignmentFADP, GDPR, DORA and NIS2 Trust CenterSecurity and privacy documentation

Vendor reviewRequest our security and legal documents under NDARequest documents →

Tools

Exposure calculatorEstimate your firm's exposure ScorecardScore your WhatsApp exposure

Read

The Formal RecordNews and analysis, every second Wednesday ArticlesPractical writing on evidential client communication WhitepaperThe Letro whitepaper

Support

Help CenterAnswers for users and administrators FAQContact support

Company

ContactTalk to the Letro team Founding firmsFirst 3 months free on every tier

The Formal Record

Security, identity and AI news for regulated practice, on the record

A fortnightly briefing from Letro for law, finance and fiduciary firms. Every record is dated, sourced and kept.

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Subjects

Cybersecurity Verification AI Communication Identity Editorial policy →

Latest

Security, identity and AI news for law, finance and fiduciary practice.

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The Formal RecordSecurity, identity and AI news for law, finance and fiduciary practice.All records →

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Founding program

Join as a founding firm

The first firms on Letro shape what it becomes. Tell us about your firm — it takes a few minutes.

01Your firm
02Primary contact
03Deployment model
04Program terms

What founding firms get

Your first 3 months free, on every tier
Setup fees waived — on-premise installations excepted
A direct say in the roadmap

Founding firm applicationAll fields required unless marked optional

Secure, evidential client communication for firms that are judged on discretion.

Hosted in SwitzerlandEnd-to-end encrypted10-year retentionPen test · Sept 2026 · in progress

Product

Key Features Why Letro?Private AI PostNumber Download Web app Pricing

Solutions

Wealth & Asset Management Law Firms Fiduciaries & Trustees Client Onboarding & KYC Audit-Ready Archiving WhatsApp Alternative

Security

Matrix Protocol Data Sovereignty Air-Gapped Deployment Regulatory Alignment Trust Center

Company

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