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Open-source instant messaging platform from Sweden with VoIP, screen sharing, moderation tools, and self-hosting options. Built for friends and communities.
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.
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