Use case
Microsoft Teams Alternative
Team collaboration with legal-grade control over where data lives and who can reach it — and external clients who can join without an IT ticket.
What it is
Secure team collaboration for firms that need stronger conversation scoping than a general-purpose suite, data residency in Switzerland or on their own infrastructure, and a way to bring external clients and partners in without the friction of guest accounts.
Why team collaboration belongs in Letro
Data stays inside your boundary
Swiss hosting by default; Sovereign deployments run on your own infrastructure, including air-gapped.
External parties without friction
Clients and partners join with a verified PostNumber. No guest-tenant configuration, no licensing puzzle.
Structured, not overloaded
Workspaces and projects keep conversations scoped. Voice and video calls run inside them.
Built for compliance
Every message, file action and access event is designed to leave a timestamped, tamper-evident trail.
How Letro replaces Teams
Fewer channels, clearer boundaries, and a record you own.
01
Create Workspaces and projects
Mirror how your firm is organised — desks, matters, client groups.
02
Bring colleagues and externals in
Everyone joins as a verified Principal; permissions follow the Workspace.
03
Collaborate in one place
Messages, files, polls and calls stay inside the Workspace.
04
Own the data
Choose Cloud, Dedicated or Sovereign hosting according to your risk profile.
Discuss Your Deployment Model
Whether you need a standard rollout, private infrastructure, or stricter residency and isolation requirements, Letro gives you a trustless foundation for secure client communication.
