The secure, self-hostable Microsoft Teams alternative
Teams is deeply woven into Microsoft 365, which is exactly why some organisations can’t use it for their most sensitive work: it lives on Microsoft’s US-owned cloud, and end-to-end encryption is limited to one-to-one calls. Ollasync focuses on the confidential slice — encrypted, self-hostable, sovereign.
Teams is an excellent collaboration hub if you’re all-in on Microsoft 365, and Microsoft’s EU Data Boundary addresses many residency needs. It offers opt-in E2EE for one-to-one calls. Where it falls short is self-hosting and server-blind, group-scale confidentiality.
Ollasync vs Microsoft Teams, capability by capability
| Capability | Ollasync | Microsoft Teams |
|---|---|---|
| Self-hosted / on-premise deployment | Private cloud, on-premise or air-gapped | — Microsoft 365 cloud |
| Fully air-gapped operation | — | |
| You operate the media servers | Self-host the relay (SFU) yourself | — Microsoft operates it |
| Server-blind end-to-end encrypted messaging | IETF MLS / RFC 9420, on by default | — Channel/chat not E2EE |
| Optional end-to-end encrypted meetings | Per-frame E2EE mode | ~ 1:1 calls only, opt-in |
| EU data residency | EU-hosted, or your own region | ~ EU Data Boundary |
| No vendor access to content (self-hosted) | — | |
| Native confidential deal rooms / data room | Role + NDA gated, with live video | — No native data room |
| Non-US operator / jurisdiction option | Self-host, or EU operator | — US company (CLOUD Act) |
yes ~ partial / conditional — not offered
When Ollasync is the better fit
- You need confidentiality beyond one-to-one calls, including group meetings and messaging.
- You need to run the platform on your own infrastructure or air-gapped — not the Microsoft cloud.
- You need a confidential, NDA-gated deal room with live video.
- You need a non-US operator or full jurisdictional control over the data.
Ollasync vs Microsoft Teams — FAQ
Does Microsoft Teams have end-to-end encryption?
Teams offers opt-in end-to-end encryption for one-to-one calls. Group meetings, channels and chat are encrypted in transit and at rest but are not end-to-end encrypted. Ollasync provides server-blind end-to-end encrypted messaging by default and an E2EE meeting mode.
Can Teams be self-hosted?
No — Teams runs on Microsoft 365’s cloud. Microsoft’s EU Data Boundary helps with residency, but you cannot operate the servers yourself. Ollasync is built to be self-hosted or air-gapped.
We’re a Microsoft shop — can we still use Ollasync?
Yes. Ollasync integrates with your identity provider (including Entra ID) via OIDC single sign-on, so you can use it for confidential work alongside Teams for everyday collaboration.
Move your confidential meetings off Microsoft Teams.
Keep the one-click experience your team expects — add self-hosting, server-blind messaging and deal rooms. See it on your own infrastructure.