US-based service. Data subject to US jurisdiction
by Salesforce
Team messaging platform with channels, direct messages, file sharing, and integrations with hundreds of business tools.
11 privacy-focused, GDPR-compliant alternatives
Curated by Sidney van den Boogaard, Founder of BuiltInEu · Updated
Quick answer: 11 European alternatives to Slack are listed, from 6 countries. 4 are open source and 5 have a free plan. Top picks: Element, BirdyChat and Vroff.
| # | Product | Country | Pricing | Free plan | Open source | Self-host |
|---|---|---|---|---|---|---|
| 1 | Element | 🇬🇧United Kingdom | Freemium | Yes | Yes | Yes |
| 2 | BirdyChat | 🇱🇻Latvia | No | Not verified | Not verified | |
| 3 | Vroff | 🇸🇪Sweden | Freemium | Yes | No | Yes |
| 4 | Wire | 🇨🇭Switzerland | Freemium | Yes | Yes | Yes |
| 5 | Stackfield | 🇩🇪Germany | Paid | No | No | No |
| 6 | Stoat | 🇬🇧United Kingdom | Freemium | No | Yes | Yes |
| 7 | MeisterTask | 🇩🇪Germany | Freemium | Yes | No | No |
| 8 | OpenProject | 🇩🇪Germany | Freemium | Yes | Yes | Yes |
| 9 | Teamwork | 🇮🇪Ireland | Subscription | Not verified | Not verified | Not verified |
| 10 | Zenkit | 🇩🇪Germany | Freemium | No | No | No |
| 11 | Threema | 🇨🇭Switzerland | Paid | No | No | Yes |
A dash means we have not verified that attribute. Migration difficulty is shown only where the editor tested the switch.
by Element
Element is a secure and interoperable communications platform built on the Matrix open standard. It offers organisations control over their communications with features like end-to-end encrypted messaging, voice and video calls, and desktop collaboration. Element supports digital sovereignty by allowing self-hosted solutions and ensuring independence from vendor-locked systems.
by BirdyChat
BirdyChat is a dedicated messaging app for professionals, enabling chats that keep work conversations separate from personal ones, while also allowing users to send and receive WhatsApp messages. It is designed for focused exchanges and collaborative work, with a commitment to end-to-end encryption.
by Vroff
Vroff is a Swedish all-in-one digital workspace that bundles video meetings, threaded chat, project management, a shared calendar, and team metrics into a single platform. Built around a rooms model — team members move between rooms to see who is available and collaborate in real time, similar to Discord but positioned for work. Developed and hosted in Sweden by the privately-owned Zápas Group (parent of SMS Teknik, TellusTalk, and InTime, a 20+ year Swedish software operator). Data is AES-encrypted at rest on Swedish cloud infrastructure; the product complies with GDPR, DORA, and NIS2. End-to-end encryption is on the roadmap but not yet shipped, and a native mobile app is planned for summer 2026. Free for up to 100 users per office.
by Wire
Wire is a secure communication platform designed for organizations, offering end-to-end encrypted messaging, calls, and file sharing. It provides flexible deployment options including cloud, on-premises, and hybrid solutions. Wire is trusted by enterprises and governments for its security, compliance, and digital sovereignty features.
by Stackfield GmbH
Stackfield is an all-in-one project management tool designed for organizations that handle sensitive data. It provides features for secure communication and collaboration, making it ideal for sectors like government, banking, and education.
by Stoat
Stoat (formerly Revolt, rebranded in October 2025) is an open-source, privacy-focused messaging platform built in the UK. It provides a familiar Discord-like experience with servers, channels, voice chat, and rich media sharing — but with full GDPR compliance and EU data hosting. Stoat is fully self-hostable, giving communities and teams complete control over their data. It features fine-grained role-based permissions, end-to-end encryption, and does not require a phone number or real name to register. Ideal for privacy-conscious communities looking for a feature-rich alternative to Discord.
by Meister
MeisterTask is a German-made intuitive project and task management tool built on Kanban boards. Offers seamless collaboration with time tracking, automation, and integrations. GDPR compliant with EU data hosting. Integrates well with MindMeister for mind mapping.
by OpenProject GmbH
OpenProject is an open source project management software providing powerful classic, agile, or hybrid project management solutions in a secure environment. It enhances team productivity and allows for seamless collaboration across various project methodologies.
by Teamwork.com
Teamwork is an Irish project management platform designed for client work and agencies. Offers comprehensive features including time tracking, resource management, and billing. GDPR compliant with EU headquarters in Cork, Ireland.
by Axonic Informationssysteme
Zenkit is a versatile project management tool that enables teams to collaborate effectively through various methodologies, providing features like Kanban boards, Gantt charts, and resource management all in one platform.
by Threema
Threema is a Swiss encrypted messenger founded in 2012 by Manuel Kasper in Pfäffikon, Switzerland. Unlike most messaging apps, Threema requires no phone number or email to register — users get a random Threema ID, enabling truly anonymous communication. All messages, calls, and files are end-to-end encrypted, and metadata is minimized by design. Threema is fully open source and has been independently audited. It's widely adopted in German-speaking countries and used by the Swiss government and military.
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