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GDPR Compliance Risk

Slack is a US-based service subject to the CLOUD Act. EU organizations using this service risk non-compliance with GDPR data transfer requirements.

Slack logo

GDPR-Compliant Alternative to Slack

🇺🇸Salesforce · US-based · Subject to CLOUD Act

Slack is a messaging application developed by Salesforce, designed to facilitate communication and collaboration within teams and organizations. It offers a platform where users can create real-time collaboration channels, share files with version control, and integrate various project management tools. Slack is known for its customizable workflow automation and AI-powered message suggestions, which aim to enhance productivity and streamline communication. The application supports cross-application integrations, allowing users to connect with other tools they use daily. Additionally, Slack provides searchable message history and secure guest access for external partners, making it suitable for both internal and external communications. The primary users of Slack include businesses, project teams, and organizations looking for a centralized communication platform. It is important to note that Slack is a US-based product, and user data is stored in the United States, subject to US data laws such as the CLOUD Act and FISA 702. Slack operates on a freemium pricing model, offering basic features for free with additional functionalities available through paid plans.

Why You Need a GDPR-Compliant Alternative to Slack

Since the landmark Schrems II ruling in 2020, transferring personal data to US-based services like Slack has become a significant legal risk for EU organizations. The US CLOUD Act gives American authorities the power to access data held by US companies, regardless of where that data is physically stored — even if it's in an EU data center.

While the EU-US Data Privacy Framework (DPF) adopted in 2023 provides a new legal basis for transfers, privacy experts and legal scholars have raised concerns about its long-term viability. The framework could face the same fate as its predecessors (Safe Harbor and Privacy Shield), both of which were struck down by the Court of Justice of the EU.

For organizations that want to eliminate compliance risk entirely, switching to a European-based messaging apps is the most straightforward solution. Below are the best GDPR-compliant alternatives to Slack, all headquartered in Europe with data stored in EU data centers.

CLOUD Act Exposure

US authorities can access your data stored by Slack, even if servers are located in Europe.

GDPR Fine Risk

Non-compliant data transfers can result in fines up to 4% of annual global revenue under GDPR Article 83.

EU Alternative Available

3 GDPR-compliant European alternatives available with full EU data residency.

3 GDPR-Compliant Alternatives to Slack

European services with full GDPR compliance and EU data residency

Element logo

Element

🌍

by Element

Element is a Matrix-based end-to-end encrypted messenger and secure collaboration app. It’s decentralised for digital sovereign self-hosting, or through a hosting service such as Element Matrix Services. Element operates on the open Matrix network to provide interoperability and easy connections.

Open SourceSelf-HostableISO 27001EU-hostedGDPR Compliant
freemiumMigration:●●●Several hours to a few days, depending on workspace size

Why switch?

  • Matrix protocol allows interoperability with other systems.
  • End-to-end encryption is enabled by default for all chats.
  • Self-hosting ensures data control and privacy compliance.

Consider

  • Migration from Slack may require significant time and effort.
  • Element lacks integrated project management tools.
View DetailsCompareSwitch Guide
Visit Element
Wire logo

Wire

🇨🇭

by Wire

Collaborate without compromise with Wire, the trusted platform for millions worldwide. Stay in control with end-to-end encryption that's invisible, flexible collaboration, and intuitive user interface. Join now for free and boost your productivity.

EU-BasedGDPR CompliantOpen SourceSelf-HostableSwiss hosted
freemiumMigration:●●●Several hours to a few days, depending on workspace size and complexity

Why switch?

  • End-to-end encryption ensures messages are secure from unauthorized access.
  • GDPR compliance means better data protection for EU users and organizations.
  • Self-hosted deployment option allows for greater control over data management.

Consider

  • Migration from Slack may require significant time and resources.
  • Missing advanced project management tools found in Slack's ecosystem.
View DetailsCompareSwitch Guide
Visit Wire
Stoat logo

Stoat

🌍

by Stoat

Stoat (formerly Revolt) is an open-source, privacy-focused messaging platform from the United Kingdom. It offers a Discord-like experience with servers, channels, and voice chat, but with full GDPR compliance and EU data hosting. Stoat features customizable servers, role-based permissions, rich media sharing, and end-to-end encryption options. As a self-hostable solution, it gives users complete control over their data. Ideal for communities, teams, and individuals who want a feature-rich chat platform without compromising on privacy.

GDPR CompliantEU-hostedSelf-HostableOpen Source
freemiumMigration:●●●Several hours to a few days, depending on workspace size

Why switch?

  • GDPR compliance ensures strict data protection for EU users.
  • Open source allows for customization and community-driven improvements.
  • Real-time collaborative storytelling enhances user engagement and creativity.

Consider

  • Migration from Slack may disrupt existing workflows and team dynamics.
  • Fewer project management tools compared to Slack's integrated features.
View DetailsCompareSwitch Guide
Visit Stoat

Quick GDPR Compliance Comparison

ServiceHQ LocationGDPR NativeEU Data CentersCLOUD Act FreePricing
🇺🇸Slack
United StatesNoPartialNo-
🌍ElementGBYesYesYesfreemium
🇨🇭WireCHYesYesYesfreemium
🌍StoatGBYesYesYesfreemium

Frequently Asked Questions

Is Slack GDPR compliant?

Slack is a US-based service operated by Salesforce. While it may have some GDPR compliance measures, as a US company it is subject to the CLOUD Act, which allows US authorities to access data stored by US companies regardless of where the data is physically located. This creates a fundamental conflict with GDPR requirements for data protection.

What are the GDPR risks of using Slack?

The main GDPR risks include: (1) Data transfers to the US may lack adequate protection since the Schrems II ruling invalidated Privacy Shield, (2) US authorities can demand access under the CLOUD Act, (3) Your organization may face GDPR fines up to 4% of annual revenue for non-compliant data transfers, and (4) User consent may not be sufficient to legitimize transfers given the systematic access by US authorities.

What are the best GDPR-compliant alternatives to Slack?

The top GDPR-compliant alternatives to Slack include Element, Wire, Stoat. These European services store your data in EU data centers and are fully subject to GDPR protections.

How do I migrate from Slack to a GDPR-compliant alternative?

Most migrations involve three steps: (1) Export your data from Slack using their data export tools, (2) Create an account with your chosen EU alternative, and (3) Import your data into the new service. We provide detailed migration guides for each alternative to make the switch as smooth as possible.

Can EU companies legally use Slack?

Since the Schrems II ruling (2020), EU organizations face significant legal risk when using US cloud services like Slack. While the EU-US Data Privacy Framework (2023) provides a new legal basis, its long-term stability is uncertain. Many EU data protection authorities recommend using EU-based alternatives to avoid compliance risks entirely.

Other GDPR Alternatives in Messaging Apps

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Related Pages

Migration Resources

Last updated: January 26, 2026