Team communication services

Mattermost by Stackhero

Managed Mattermost chat from France

FranceEUEU hosted♻ Ownership reviewed, controller unresolved

Scope verdict

Ownership reviewed, controller unresolved

This service remains visible for context, but it is not counted or recommended as a European-controlled option.

How we classify services

Mattermost by Stackhero is a managed instance of Mattermost, the open source team communication service, provided by the France based cloud company Stackhero. Mattermost is aimed at developers but works for any group that needs persistent channels and direct messaging, and it is normally self hosted.

Taking it as a managed service removes the operational work while keeping the open source software. Stackhero hosts on Scaleway and Hetzner, which use only renewable energy for their servers, making it a European alternative to US chat platforms for teams that want an EU supplier.

Data and operations

Infrastructure and email path

Verified operational dependencies, shown separately from ownership and from the service's core data hosting.

Public website

Cloudflare

Non-European provider
Observed
A 104.21.23.117, 172.67.210.212 · AS13335

Why this matters

Public DNS routes website visits through Cloudflare. Visitor IP addresses and request metadata can reach this non-European provider; this does not identify the core service's data location.

Incoming business email

Proton Mail

European provider
Observed
MX 10 mail.protonmail.ch · 20 mailsec.protonmail.ch

Public DNS records identify visible providers and routes, not every backend location or private data-region setting.

Infrastructure checked:

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