Fluxer vs Microsoft Teams
Fluxer is a European alternative to Microsoft Teams: same messaging & chat use case, headquartered in Sweden and governed by EU GDPR, while Microsoft Teams is based in the United States.
By the EU Alternatives team Last updated
Open-source instant messaging platform from Sweden with VoIP, screen sharing, moderation tools, and self-hosting options. Built for friends and communities.
- Jurisdiction
- EU / EEA
- Primary privacy law
- EU GDPR
- US CLOUD Act exposure
- No
- Open source
- Yes
- Free tier
- No
Microsoft Teams is the chat and video meeting hub bundled into Microsoft 365, which made it the default in much of the corporate world. A limited free version exists, but most organisations get Teams through per-user Microsoft 365 subscriptions. Microsoft is headquartered in Redmond, Washington, and Teams data falls under the US CLOUD Act even when stored in EU data centres.
- Jurisdiction
- United States
- GDPR by default
- Requires DPA + TIA
- US CLOUD Act exposure
- Yes
Fluxer vs Microsoft Teams at a glance
| Fluxer | Microsoft Teams | |
|---|---|---|
| Headquarters | Sweden | United States |
| Data jurisdiction | EU / EEA | United States |
| Primary privacy law | EU GDPR | Requires DPA + transfer assessment |
| US CLOUD Act exposure | No | Yes |
| Best for | Teams that need messaging & chat built for European data-protection requirements | Teams already invested in the Microsoft Teams ecosystem |
Choose Fluxer if…
- You want a provider governed by a European privacy regime
- GDPR or public-sector data-protection requirements apply to you
- Open-source code and self-hosting matter to you
- You'd rather back the European tech ecosystem
Stick with Microsoft Teams if…
- You depend on integrations only available in the Microsoft Teams ecosystem
- Your organisation has no EU data-residency constraints
- Migration costs outweigh the jurisdiction benefits for now
About Fluxer
Fluxer is a Swedish open-source instant messaging and collaboration platform combining team chat, channels, voice and video calls, file sharing and integrations in a single workspace. Built in Sweden as a sovereign alternative to Slack and Microsoft Teams, it targets businesses, public institutions and communities that need fully EU-hosted messaging without US cloud dependencies.
The platform pairs a modern chat UI (threads, reactions, mentions, pinned messages) with integrated VoIP, video meetings, screen sharing and a searchable message history. Native apps for Windows, macOS, Linux, iOS, Android and the web keep conversations and files synchronised across every device, while a plugin system allows custom integrations with internal tools.
Key benefits:
- Open-source core with publicly auditable code for self-hosted deployments
- Channels, threads and direct messages with reactions, mentions and pins
- Integrated voice and video with screen sharing for ad-hoc team calls
- File sharing and previews for documents, images and code snippets
- Native clients on Windows, macOS, Linux, iOS, Android and modern browsers
- Plugin system for custom integrations with internal services and webhooks
- Self-hosting option for organisations that need full control over data and infrastructure
Fluxer is operated from Sweden, with all production infrastructure hosted inside the European Union under GDPR and Swedish data-protection law. A full DPA, SCCs for sub-processors and the option to self-host on customer infrastructure are available to every paying organisation.
Ideal for European businesses, public-sector bodies and communities that want a Slack or Microsoft Teams replacement with open-source DNA, sovereign EU hosting and optional self-hosting for the most sensitive deployments.
Why choose Fluxer over Microsoft Teams?
The decisive argument is data jurisdiction. Microsoft Teams is headquartered in the United States, which means personal data processed through it can be subject to non-EU legal regimes: the US CLOUD Act, FISA 702, or similar laws depending on the provider. After the 2020 Schrems II ruling, EU organisations must carry out a transfer impact assessment for every such data flow.
Fluxer removes that overhead. As a Sweden-based provider, it operates under EU GDPR, and data stays inside the EU/EEA by default. For regulated sectors such as health, public administration, and finance, that's not a nice-to-have but a requirement. For everyone else, it's concentration-risk insurance: you avoid depending on a single jurisdiction that can change the rules without warning.