17 Best European Microsoft Teams Alternatives in 2026

Whereby is a Norwegian browser-based video conferencing platform that requires no download, no install, and no account for meeting guests. Rooms are permanent — share your link once and it works every time — making it the simplest way to run video calls for customer-facing teams, telehealth providers, and SaaS products that need embedded video.

The Embedded product provides an SDK and API for integrating video directly into your own application — with custom branding, programmatic room creation, and controls over layout, chat, and recording. Breakout rooms, virtual whiteboards, file sharing, and AI-powered transcription handle the full meeting workflow without additional tools.

Key benefits:

• No download required — guests join via browser link with no account or install
• Permanent room links that work every time without scheduling ahead
• Embeddable SDK for integrating video into any web or mobile product
• Custom branding with your logo, colours, and domain in the room interface
• Breakout rooms for splitting large sessions into focused smaller groups
• Recording and AI transcription with automated meeting summaries
• HIPAA and ISO 27001 certified for healthcare and regulated use cases

Whereby is headquartered in Oslo, Norway, an EEA member state with full GDPR applicability. The platform holds ISO 27001 and HIPAA certifications and stores data on European infrastructure. As a Norwegian-owned company, Whereby is not subject to U.S. cloud jurisdiction, FISA, or the CLOUD Act.

Used by telehealth providers, online tutors, customer support teams, and SaaS builders who need reliable, no-friction video experiences embedded in their own products.

Wire is a Swiss end-to-end encrypted messaging and collaboration platform that protects business communications with always-on encryption across messages, calls, and files — no configuration required. Built for enterprises and government agencies, it brings consumer-grade E2E crypto together with the compliance controls, audit logs, and federation capabilities organisations require.

Teams communicate through persistent conversations and instant meetings with screen sharing, while guest invitations enable secure collaboration across organisational boundaries. An open-source codebase allows independent audits, and deployment options span Wire's cloud, private cloud, or fully on-premises — with federated setups connecting multiple Wire instances across departments or partner organisations.

Key benefits:

• Always-on E2E encryption for messages, voice calls, video calls, and file transfers
• Zero-knowledge architecture — Wire cannot read your messages even if subpoenaed
• Federation to connect separate Wire instances across organisations or departments
• Guest rooms for secure communication with external parties without requiring a Wire account
• On-premises deployment for air-gapped or strict data sovereignty requirements
• Open-source clients on GitHub for independent cryptographic audits
• ISO 27001 certified and NIS2-compliant for regulated and critical infrastructure sectors

Operated by Wire Swiss GmbH, headquartered in Zug, Switzerland, with data processing compliant with GDPR and Swiss data protection law. Wire holds ISO 27001 certification and supports NIS2 requirements. Self-hosted deployments keep all data on organisation-controlled servers.

Trusted by 1,800+ organisations including BMW, EY, Schwarz Gruppe, and defence agencies across Europe and North America.

Stackfield is a German all-in-one collaboration platform combining team chat, task management, video conferencing, document editing, and file sharing — all protected by end-to-end encryption that prevents even Stackfield from reading your content. Built for businesses that treat data sovereignty as a compliance requirement, not a marketing claim.

Projects organise tasks, discussions, and files in shared rooms, while an integrated calendar and time-tracking module keep schedules and billable hours visible across the team. ISO 27001, ISO 27017, and ISO 27018 certifications cover the full cloud environment, giving compliance teams documented evidence of controls without commissioning additional audits.

Key benefits:

• True E2E encryption for all messages, tasks, files, and video calls — zero server-side access
• Team channels and direct messages with threads, reactions, and file attachments
• Task and project management with boards, lists, deadlines, and assignment tracking
• Built-in video conferencing — no third-party service or external app required
• Collaborative document editing within the platform without leaving to external tools
• Time tracking and reporting linked to projects and tasks for billing and oversight
• ISO 27001, 27017, 27018 certified with all data stored in German data centres only

Stackfield GmbH is based in Munich, Germany, storing all data exclusively on German servers under GDPR and German data protection law. End-to-end encryption means no plaintext content is ever accessible to Stackfield, even under a German court order. Founded in 2012, it now serves 10,000+ companies.

The compliance-first collaboration platform for European businesses requiring verifiable data sovereignty and true E2E encryption across every feature.

Pexip delivers secure video collaboration with full deployment control, letting organizations run meetings on their own infrastructure or in any cloud. The platform powers interoperable video across Microsoft Teams, Zoom, Google Meet, and Cisco, making it the reference choice for governments and defense agencies that cannot accept standard SaaS video tools.

Pexip's engine can be deployed self-hosted, in private cloud, or as managed service, with add-ons for private AI transcription, meeting-room scheduling, one-touch join, and appointment booking via Pexip Engage. The Connect product bridges legacy and modern room systems with Teams and Zoom, and Secure Meetings ships dedicated environments with custom integrations for classified or regulated workloads.

Key benefits:

• Self-hosted deployment with full control over data, keys, and network topology
• Teams and Zoom interoperability so existing room hardware keeps working
• Private AI for transcription and summarization without data leaving the estate
• Air-gapped and classified operation supported for defense and government
• Global partner ecosystem including Microsoft, Google, HP, Logitech, and NVIDIA

Pexip AS is headquartered in Oslo, Norway, with engineering across Europe. The platform meets GDPR requirements, holds ISO 27001 certification, and is FedRAMP-authorized for US federal use, giving European customers sovereign deployment options under EU and Norwegian jurisdiction while maintaining the highest public-sector assurance levels.

Trusted by NATO, the U.S. Department of Veterans Affairs, the U.S. Air Force, the U.S. Department of the Treasury, and the German Bundesagentur für Arbeit.

Element delivers sovereign, interoperable communications built on the open Matrix standard, combining end-to-end encrypted messaging, voice, video, and file sharing across a decentralised network that no single vendor controls. Teams communicate on their own terms — self-hosted, cloud, or federated with partners — without locking into a proprietary platform.

Because Element is built on Matrix, every deployment can federate with any other Matrix homeserver, enabling secure cross-organisation rooms between agencies, contractors, or allied governments. The platform supports air-gapped networks, cross-signed device verification, and bridges to Slack, Teams, IRC, and SMS, giving large organisations a single secure hub for regulated collaboration.

Key benefits:

• Matrix-native federation enables secure collaboration across independent organisations
• End-to-end encryption protects every message, call, and file with cross-signed devices
• Self-hosting and air-gap support keeps sensitive networks fully isolated
• Open standard foundation removes vendor lock-in and enables long-term interoperability
• Bridges and integrations connect Element with Slack, Teams, and legacy messaging
• Element Call delivers encrypted group video without third-party conferencing tools

Element is ISO/IEC 27001:2022 and Cyber Essentials Plus certified, OpenChain ISO/IEC 5230 compliant, and offers EU-hosted deployments under GDPR, with the Matrix protocol itself governed by a non-profit foundation based in Europe. This makes it a trusted choice for sovereign, regulated communication outside US cloud jurisdiction.

Used by NATO, the German Bundeswehr, the United Nations, HM Government, and the French state's Tchap platform, Element is ideal for government, defence, and enterprise teams that need secure, standards-based collaboration at national scale.

RealTyme is a sovereign secure communications platform that protects calls, messages, files, and metadata with end-to-end and post-quantum encryption, built for governments, defence agencies, and critical infrastructure operators. Its zero-trust architecture enforces policy at every interaction, so organisations can collaborate confidentially even across hostile or untrusted networks.

The platform combines encrypted messaging, voice and video conferencing, secure file sharing, and closed user groups with real-time access control. Administrators can revoke devices, rotate keys, enforce ephemeral messaging, and integrate with existing identity providers, delivering Slack-style collaboration under full operational sovereignty and policy control.

Key benefits:

• Post-quantum cryptography protects communications against future quantum threats
• Zero-trust architecture enforces real-time access and device control policies
• Metadata protection prevents traffic analysis and relationship mapping
• Sovereign deployment runs on-premises, sovereign cloud, or Swiss private cloud
• Closed user groups isolate sensitive conversations by mission or clearance level
• NIS2 and DORA support aligns with EU security and resilience directives

Headquartered in Switzerland, RealTyme aligns with GDPR, supports NIS2 and DORA compliance, and offers Swiss-hosted or fully on-premises installations under customer-controlled keys. Swiss jurisdiction and customer-held encryption place it squarely outside US cloud reach for regulated European operators.

RealTyme is ideal for national institutions, defence and military units, financial regulators, healthcare networks, and energy operators that need secure, quantum-resilient collaboration with complete control over their data and keys.

ClickMeeting is a Polish browser-based webinar and video conferencing platform for running live webinars, automated webinars, paid online events, online courses and virtual meetings entirely in the browser. Founded in Gdańsk in 2011, it serves 170,000+ customers across 160+ countries and is the largest webinar vendor headquartered in Central Europe.

The platform pairs live and on-demand webinar formats with a full event workflow: registration pages, automated email sequences, reminders, polls, Q&A, call-to-action buttons, recording and replays. A paid-webinars module lets organisers charge for access through PayPal and Stripe, and integrations with HubSpot, Salesforce, Moodle, Google Analytics and Zapier push attendee data back into the marketing stack.

Key benefits:

• Live, automated and on-demand webinars with no download required for attendees
• Registration pages, reminders and follow-up emails automated per event
• Breakout rooms and multi-presenter support for training and workshop formats
• Paid webinars with integrated PayPal and Stripe checkout
• Polls, Q&A, surveys and call-to-action buttons for interactive sessions
• Recording and replays stored in the cloud with shareable links
• Integrations with HubSpot, Salesforce, Moodle, Google Analytics and Zapier

ClickMeeting is headquartered in Gdańsk, Poland, and hosts all event and attendee data on EU-based infrastructure under GDPR and the Polish UODO. A full DPA, SCCs for sub-processors and ISO 27001-aligned operations are available to every paying customer.

Trusted by 170,000+ organisations across finance, education, healthcare and technology, ClickMeeting is the reference choice for European teams that want a browser-based webinar platform with strong monetisation features and sovereign EU data residency.

Fleep is a professional team messenger from Estonia that unifies chat, tasks, file sharing, and email in one lightweight workspace, built for companies that want straightforward collaboration without the bloat of enterprise suites. Conversations flow across internal teams and external partners through a single address, combining the directness of email with the speed of chat.

The platform organises work around conversations that carry a pinboard for decisions, a file drawer for shared assets, and task lists for action items. Each conversation has its own email address, so external contacts can reply from Gmail or Outlook while internal teams use Fleep natively, removing the usual friction of cross-company communication.

Key benefits:

• Email-chat hybrid lets external contacts reply via standard email addresses
• Pinboard and tasks keep decisions and action items attached to each conversation
• File drawer collects every shared file per conversation for easy retrieval
• Cross-platform apps cover web, Windows, macOS, Linux, iOS, and Android
• Simple pricing starts at €5 per user per month with a free tier available
• Open integrations connect Fleep to Trello, GitHub, Jira, and custom webhooks

Built and operated in Tallinn, Estonia, Fleep is hosted in EU data centres and fully GDPR compliant, giving teams European data sovereignty by default. As an Estonian product, it benefits from one of the EU's most mature digital regulatory frameworks and e-government infrastructure.

Ideal for small and mid-sized teams, agencies, and distributed organisations that want a clean Slack alternative with tight email integration and transparent European hosting.

Jitsi is an open-source video conferencing platform providing free, unlimited video meetings, webinars and team collaboration over WebRTC. Originally developed in Strasbourg, France and now stewarded by 8x8, Jitsi powers millions of self-hosted and Jitsi Meet-hosted conferences with no account required and no participant cap beyond hardware limits.

The platform ships as two complementary projects: Jitsi Videobridge — a scalable Selective Forwarding Unit (SFU) for large group calls — and Jitsi Meet, the full web client with chat, screen sharing, raised hands, reactions, breakout rooms, live streaming to YouTube and recording to Dropbox. Everything runs in a modern browser without plugins, with mobile apps for iOS and Android.

Key benefits:

• Fully open-source under Apache 2.0 with public GitHub repositories and releases
• Self-hostable on any Linux server with Debian/Ubuntu packages and Docker images
• Unlimited participants per conference subject to SFU and bandwidth capacity
• End-to-end encryption (E2EE) on supported browsers via insertable streams
• Screen sharing, recording and live streaming to YouTube out of the box
• Breakout rooms, polls, raised hands and reactions for modern meeting workflows
• Embed via iframe API or integrate deeply through the Jitsi Meet SDK

Jitsi is developed by 8x8 with core engineering teams in France, and the hosted Jitsi Meet service runs on European and US infrastructure. Self-hosted deployments let operators keep all signalling, media and recording data entirely inside the EU under GDPR, with full control over logs, retention and sub-processors.

Trusted by universities, NGOs, governments and millions of individual users, Jitsi is the reference choice for teams that want a privacy-respecting, open-source video conferencing stack with full EU self-hosting options.

Leviia Next is a French collaborative workspace built on Nextcloud combining file sync and share, calendars, contacts, video meetings, chat, office documents and tasks in a single sovereign platform. Operated by Leviia, a French cloud provider headquartered in Le Havre, it targets businesses and public-sector organisations that need a Microsoft 365 or Google Workspace replacement hosted entirely in France.

The platform pairs the open-source Nextcloud Hub with Leviia's managed operations, S3-compatible object storage and datacentre infrastructure. Users get familiar web, desktop (Windows, macOS, Linux) and mobile clients, real-time co-editing through Collabora Online, integrated Nextcloud Talk for chat and calls, and client-side encryption options for sensitive folders.

Key benefits:

• File sync and share across Windows, macOS, Linux, iOS and Android clients
• Real-time co-editing of documents, spreadsheets and presentations via Collabora Online
• Nextcloud Talk for chat, audio and video conferencing with screen sharing
• Calendars, contacts and mail with CalDAV, CardDAV and standards-based sync
• End-to-end encrypted folders for sensitive data with client-managed keys
• Managed operations including updates, backups and 24/7 French-speaking support
• Open-source core (AGPLv3) with no vendor lock-in on file formats or data export

Leviia Next is headquartered in Le Havre, France, with data centres located in France under GDPR and French CNIL oversight. ISO 27001 certification, SecNumCloud alignment, a full DPA and contractual exclusion of any non-EU sub-processor are standard on every plan.

Ideal for French and European organisations — including public administrations, healthcare providers and regulated industries — that need a sovereign, Nextcloud-based alternative to Microsoft 365 or Google Workspace hosted entirely under French jurisdiction.

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.

Livestorm is a French video engagement platform for running webinars, virtual events, product demos, online courses and all-hands meetings entirely in the browser. Founded in Paris in 2016, it powers video events for 10,000+ companies worldwide and has built its reputation on a zero-download, browser-first experience for organisers and attendees alike.

The platform pairs live and on-demand webinar modes with automated workflow features: registration landing pages, email sequences, reminders, polls, Q&A, handouts, upvoting, replays and analytics. Integrations with HubSpot, Salesforce, Marketo, Pardot, Pipedrive and Zapier push every registration and engagement metric back into the marketing stack.

Key benefits:

• Browser-based attendance with no downloads for organisers, speakers or attendees
• Registration pages, email sequences and reminders automated per event
• Live, on-demand and automated webinar modes for every content format
• Polls, Q&A, upvoting and handouts for interactive sessions
• Recording and replays with auto-published pages and analytics
• Integrations with HubSpot, Salesforce, Marketo, Pardot, Pipedrive and Zapier
• Team roles and workspaces for marketing, sales and customer-success teams

Livestorm is headquartered in Paris, France, and hosts all event, attendee and recording data on EU-based infrastructure under GDPR and French CNIL oversight. ISO 27001 certification, SOC 2, a full DPA and SCCs for any sub-processor transfer are standard on every plan.

Trusted by Shopify, Honda, Sodexo, Spendesk and thousands of marketing teams worldwide, Livestorm is the reference choice for organisations that need a browser-native webinar platform with strong automation, marketing integrations and sovereign EU data residency.

mosa.cloud is a Dutch collaborative workspace whose mail module delivers team email with shared inboxes alongside docs, drive, video meetings, chat and spreadsheets. Named after the Mosa (Meuse) river in Maastricht, it positions itself as a sovereign alternative to Google Workspace and Microsoft 365 rather than a standalone inbox, so the email experience is tightly woven into the rest of the suite.

The stack is built on top of La Suite Numérique, the open-source workspace developed jointly by the French, German and Dutch governments and already used by over 200,000 French public servants. Mail ships with AI-assisted organisation, shared team inboxes, federated Matrix-based chat via Element, Collabora-powered document editing and kDrive-style file storage, all under one pay-per-usage billing model.

Key advantages:

• Shared team inboxes route support and sales mail to a group rather than a person
• AI-assisted triage summarises threads and surfaces the messages that actually need you
• Integrated Docs, Drive, Meet and Chat remove the need for parallel Google or Microsoft accounts
• Pay-per-usage pricing replaces per-seat licensing and scales with real storage and compute
• Open formats keep documents, spreadsheets and mail portable if you ever migrate away

mosa.cloud is operated from the Netherlands and runs entirely on EU-hosted infrastructure, meaning data never leaves European jurisdiction. Security controls are built to NIS2 expectations, and the underlying La Suite Numérique codebase is already trusted at national-government scale for sovereign communications.

For teams that want to replace the full Gmail-plus-Docs-plus-Meet bundle with something European, open-source and transparently priced, mosa.cloud is one of the most coherent options available.

VNClagoon is an integrated open-source communication and collaboration suite that combines secure messaging, video conferencing, email, calendar, contacts, tasks, CRM, and project management on a single platform. It replaces a fragmented stack of Microsoft, Google, and Slack tools with one sovereign workspace built entirely on audited open-source foundations.

The suite includes VNCtalk for real-time messaging and video, VNCmail and VNCcalendar for productivity, VNCproject and VNCtask for project management, VNCcrm for customer operations, and VNCsafe for encrypted storage. A unified personalised dashboard gives each user full visibility across every interaction and workflow on one screen.

Key benefits:

• Full stack suite replaces messaging, mail, meetings, and project tools at once
• Open-source foundation ensures transparency, auditability, and no vendor lock-in
• Quantum-safe security integrates confidential computing and future-proof encryption
• Unified dashboard centralises communications, tasks, and files on one screen
• Modular deployment lets organisations adopt only the apps they need
• Federated architecture scales across departments and partner organisations

Headquartered in Switzerland with engineering in Germany and India, VNClagoon offers European hosting under GDPR, supports on-premises deployment, and targets customers that need full data sovereignty outside US and Chinese cloud jurisdictions. Swiss governance adds an additional layer of neutrality for regulated buyers.

VNClagoon is ideal for government bodies, healthcare networks, and large enterprises that want to consolidate collaboration on a single open-source stack while retaining complete control over data, keys, and infrastructure.

Matrix is an open standard and decentralised protocol for real-time communication, enabling end-to-end encrypted messaging, voice, video and collaboration across a federated network of independent servers. Stewarded by the non-profit Matrix.org Foundation — registered in the United Kingdom — it is the communication backbone of projects like Element, the French government's Tchap and the German Bundeswehr messenger.

The ecosystem combines the core Matrix protocol with a wide range of homeservers (Synapse, Dendrite, Conduit) and clients (Element, FluffyChat, Cinny, SchildiChat, Nheko). Any organisation can run its own homeserver, federate with the global network and still retain full sovereignty over its rooms, messages, identities and retention policies.

Key benefits:

• Federated, decentralised architecture where each organisation runs its own server
• End-to-end encryption (E2EE) on all direct, group and public rooms by default
• Bridges to IRC, Slack, Discord, Telegram, WhatsApp, Signal, XMPP and email
• Voice and video calls via Matrix RTC and Element Call with SFU-based group calls
• Open standards (Matrix Specification) enabling multiple interoperable clients and servers
• Self-hostable on-premises or in the cloud with Synapse, Dendrite or Conduit
• Identity and access management via SSO, OIDC, SAML, CAS and LDAP

Matrix is stewarded by the Matrix.org Foundation, a non-profit registered in the United Kingdom, with core engineering teams across Europe. Because deployments are federated, organisations can host homeservers anywhere — including EU-only regions under GDPR — and retain complete control over data, retention and sub-processors.

Trusted by the French government, the German armed forces, Mozilla, KDE and thousands of organisations worldwide, Matrix is the reference choice for teams that need end-to-end encrypted, federated communication built on open standards.