25 open-source Collaboration vendors
Open-source software for Collaboration that you can self-host, with auditable source code — regardless of the developer's headquarters.
- vendors scored
- 25
- European
- 17
- last checked
- 10 October 2026
Vendors, scored
Score per vendor: 0 = high exposure, 100 = sovereign
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- Sovereignty score 94 out of 100BigBlueButton (self-host)European Union (distributed) · Self-hosted / open sourceVirtual classroom and video conferencing; self-hostable
- Sovereignty score 94 out of 100CryptPadFrance · EU sovereignEnd-to-end encrypted collaboration (FR/EU).
- Sovereignty score 94 out of 100FluffyChatGermany · Self-hosted / open sourceOpen-source Matrix chat client with focus on simplicity and privacy
- Sovereignty score 94 out of 100HedgeDocGermany · Self-hosted / open sourceMarkdown collaboration; self-host.
- Sovereignty score 94 out of 100HulyFrance · Self-hosted / open sourceOpen-source project management and team collaboration platform (self-hosted only — vendor-hosted cloud service shut down in 2026 due to funding; huly.io hosted service discontinued)
- Sovereignty score 94 out of 100HumHubGermany · EU sovereignGerman open-source social intranet and collaboration platform
- Sovereignty score 94 out of 100LinphoneFrance · Self-hosted / open sourceOpen-source VoIP and real-time communications platform (voice, video, encrypted messaging) developed by Belledonne Communications, headquartered in Grenoble, France since 2010; actively maintained (SDK 5.5).
- Sovereignty score 94 out of 100NextcloudGermany · EU sovereignOpen-source self-hosted collaboration platform for file sync, chat, and office
- Sovereignty score 94 out of 100Nextcloud DeckGermany · Self-hosted / open sourceKanban board app for project management within Nextcloud
- Sovereignty score 94 out of 100Nextcloud TalkGermany · Self-hosted / open sourceVideo/voice within Nextcloud; self-host.
- Sovereignty score 94 out of 100Office.euNetherlands · EU sovereign100% European office suite from The Hague, built on open-source (Nextcloud), EU-only data centres
- Sovereignty score 94 out of 100OpenSlidesGermany · Self-hosted / open sourceOpen-source software (MIT) for assemblies, agendas, motions and online elections; made by Intevation in Osnabrück, as SaaS or self-hosted.
- Sovereignty score 94 out of 100OpenTalkGermany · EU sovereignGerman open-source video conferencing platform with focus on privacy and GDPR
- Sovereignty score 94 out of 100SendRecRomania · Self-hosted / open sourceOpen-source (AGPLv3), self-hostable async video messaging platform built for EU data sovereignty; operated by a Romanian sole proprietorship (Bucharest) offering both Docker self-hosting and an EU-managed cloud tier.
- Sovereignty score 94 out of 100TwakeFrance · EU sovereignOpen-source collaboration platform by LINAGORA (chat, files, tasks, calendar, video); absorbed Cozy Cloud in 2025.
- Sovereignty score 94 out of 100WireGermany · EU sovereignEnd-to-end encrypted collaboration platform headquartered in Berlin, operated by Wire Swiss GmbH (Zug, Switzerland)
- Sovereignty score 82 out of 100Open-XchangeGermany · EU sovereignEuropean open-source email, calendar, and productivity suite
- Sovereignty score 79 out of 100Element (Matrix)United Kingdom · Non-EU vendorDecentralised messaging based on the open Matrix protocol
- Sovereignty score 79 out of 100Matrix / SynapseUnited Kingdom · Self-hosted / open sourceMatrix homeserver; self-hostable.
- Sovereignty score 71 out of 100LiveKitUnited States · Non-EU vendorOpen-source WebRTC infrastructure for real-time audio and video applications
- Sovereignty score 69 out of 100Rocket.ChatBrazil · Non-EU vendorOpen-source team communication platform with self-hosting support
- Sovereignty score 61 out of 100JitsiUnited States · Non-EU vendorOpen-source video conferencing platform, self-hostable
- Sovereignty score 61 out of 100ZimbraUnited States · Non-EU vendorOpen-source email and collaboration suite for enterprises
- Sovereignty score 49 out of 100MattermostUnited States · Non-EU vendorOpen-source messaging platform for developer and DevOps teams
- Sovereignty score 49 out of 100ZulipUnited States · Non-EU vendorZulip is an open-source team chat application with threaded conversations, operated by Kandra Labs, Inc., a US company headquartered in San Francisco, California. Self-hosting is available; the cloud service is hosted by a US entity.
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