Enclessa is compared here with Microsoft Teams, Slack and Mattermost, the three products teams weigh it against. Choose on the constraint that cannot move: an ecosystem you already live in points at Teams, a third-party app estate points at Slack, a requirement to run the software yourself points at Mattermost, and a requirement that the operator cannot read a direct message points at Enclessa.
Open betaThe platform is being built in the open, so parts of it are not there yet, behaviour changes between releases, and no availability figure is committed while it is in beta. What is still being built.
How to read these pages
- Comparisons here
- Microsoft Teams, Slack, Mattermost
- Compared on
- Encryption, hosting, licensing, included modules and how you leave
- Source of every claim
- The other vendor’s own public documentation
- Other vendors’ prices
- Not quoted — they change faster than a page does
- Every page names
- The case where the other product is the better buy
- Written by
- Enclessa, which is not a neutral party and says so
The comparisons
Which of these fits you
One line per comparison, taken from the page it links to. Read the right-hand column first: if it describes you, the rest of that page will only confirm it.
| Comparison | Choose Enclessa when | Choose the other product when |
|---|---|---|
| Microsoft Teams | Confidentiality and European hosting matter more to you than Office integration | Your working day runs on Word, Excel and SharePoint, or on Teams telephony |
| Slack | The operator of the service must not be able to read a direct message | A third-party app, or a shared channel with another company, carries your process |
| Mattermost | You want the sovereignty argument without operating a platform to get it | You must run the software yourself, or you need single sign-on today |
Statements about other products come from their own public documentation and describe the position as last checked on 18 August 2026. Vendors change what they offer; check the current documentation before making a decision on the strength of this page.
Where to go next
Encrypted collaboration, hosted in Europe.
Create a workspace in a couple of minutes. It is yours at your-team.enclessa.app, hosted in the European Union, with encrypted direct messages from the first one you send.
Open beta. Free plan, no payment card to start.