Element vs Slack
Element is a European alternative to Slack: same messaging & chat use case, headquartered in United Kingdom and governed by UK GDPR, while Slack (Salesforce) is based in the United States.
By the EU Alternatives team Last updated
Experience secure, end-to-end encrypted messaging and collaboration. A decentralised platform for sovereign communication, offering self-hosting or managed services.
- Jurisdiction
- United Kingdom
- Primary privacy law
- UK GDPR
- US CLOUD Act exposure
- No
- Open source
- Yes
- Free tier
- Yes
Slack is the channel-based messaging tool that much of the corporate world runs its internal communication on. The free plan keeps 90 days of message history, while paid plans are billed per user per month. Salesforce, based in San Francisco, has owned Slack since 2021.
- Jurisdiction
- United States
- GDPR by default
- Requires DPA + TIA
- US CLOUD Act exposure
- Yes
Element vs Slack at a glance
| Element | Slack | |
|---|---|---|
| Headquarters | United Kingdom | United States |
| Data jurisdiction | United Kingdom | United States |
| Primary privacy law | UK GDPR | Requires DPA + transfer assessment |
| US CLOUD Act exposure | No | Yes |
| Best for | Teams that need messaging & chat built for European data-protection requirements | Teams already invested in the Salesforce ecosystem |
Choose Element if…
- You want a provider governed by a European privacy regime
- GDPR or public-sector data-protection requirements apply to you
- You want to start free and scale up later
- Open-source code and self-hosting matter to you
- You'd rather back the European tech ecosystem
Stick with Slack if…
- You depend on integrations only available in the Salesforce ecosystem
- Your organisation has no EU data-residency constraints
- Migration costs outweigh the jurisdiction benefits for now
About Element
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, whether 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.
Why choose Element over Slack?
The decisive argument is data jurisdiction. Slack is headquartered in the United States, which means personal data processed through it can be subject to non-EU legal regimes: the US CLOUD Act, FISA 702, or similar laws depending on the provider. After the 2020 Schrems II ruling, EU organisations must carry out a transfer impact assessment for every such data flow.
Element removes that overhead. As a United Kingdom-based provider, it operates under UK GDPR, and data stays in the United Kingdom, which the European Commission recognises as offering an adequate level of protection. For regulated sectors such as health, public administration, and finance, that's not a nice-to-have but a requirement. For everyone else, it's concentration-risk insurance: you avoid depending on a single jurisdiction that can change the rules without warning.