Why Letro
Why firms switch to Letro.
Written for the unconvinced: what ordinary channels can't do for formal client work, what Letro does differently, and how to verify every claim yourself.
01 · The status quo
Every channel you use was built for something else.
Consumer chat
Fast and familiar. But identities are unverified, records don't hold, and regulators have noticed.
Universal, and fragmented. Threads split, versions drift, senders are spoofable, responsibility blurs.
CRM & portals
Good for internal operations. Rarely the secure, client-facing layer people actually want to use.
Paper letters
Formal on the surface. Slow, content unproven, costly, disconnected from the work.
02 · Side by side
What each channel can actually prove.
Letro treats a client exchange as one connected object: request, documents, decision and record, encrypted end-to-end between verified identities.
03 · Before and after
The same mandate, twice.
Over email
1
Request lands in a shared inbox.
2
Thread splits across replies and CCs.
3
Documents attach in three versions.
4
Identity assumed from the address line.
5
Months later: reconstruct the story from fragments.
In Letro
1
Request arrives in the case workspace.
2
One thread, verified identities.
3
Documents exchanged once, in order.
4
Delivery and reading recorded automatically.
5
Months later: export the record in minutes.
04 · Objections
Fair questions, straight answers.
Isn't WhatsApp already encrypted?
It is. WhatsApp encrypts content well. But it verifies phone numbers, not people, and keeps no evidential record. Regulators have fined firms heavily for exactly this.
We already have Microsoft Teams.
Teams is strong for internal collaboration. It wasn't designed as a verified, evidential channel between your firm and its clients.
See the detailed comparison →Our clients won't install another app.
They don't have to. Address anyone by email; they open a temporary room, free, no account required. Your team works from iPhone, iPad, Android or the web app.
Why not registered post?
Registered post proves an envelope arrived, and that's real. It doesn't prove the content, encrypt anything, or let the exchange continue. Letro keeps the formality and adds the record.
05 · Verify it yourself
Don't take our word for it.
Listed
Wavestone Swiss Cybersecurity Startup Radar 2026 →
Audited cryptography
Built on independently audited cryptography: vodozemac, Least Authority 2022 →
Penetration test
Independent penetration test underway, September 2026. Report available under NDA.
Trust Center
Architecture, subprocessors, data residency →
Compare against your current channel.
Convinced enough to look closer?
Founding firms: first 3 months free.