Stackfield vs Slack
Last updated October 2026
Looking for a European alternative to Slack? Here's how Stackfield compares, on EU hosting, GDPR and what it does.
Our pick for a European buyer: Stackfield. We weight data residency, GDPR and EU jurisdiction above everything else — that is the constraint this directory exists to solve.
What it is
All-in-one German workspace for tasks, team chat and video calls, end-to-end encrypted
Team communication and collaboration platform with channels, messaging, and integrations.
Headquarters
🇩🇪 DE
🇺🇸 US · 2013
EU data residency
Yes, for all customers
Available on some plansEU data residency is available only on the most expensive plans.
DSGVO / GDPR
Yes
Yes
Certifications
ISO 27001, ISO 27017, ISO 27018
ISO 27001, ISO 27017, ISO 27018, SOC 2 Type II
Price from
€9/user/mo
$7.25/user/mo
Free plan
No
Yes
Open Source
No
No
Integrations
Dropbox, Box, Google Drive, Microsoft OneDrive / Office 365, Microsoft Teams +8
Google Drive, Zoom, Microsoft Teams, Trello, Asana +5
Where each one wins
Stackfield
Strengths
- +Clean, intuitive interface with minimal learning curve and straightforward onboarding
- +End-to-end encryption and strict EU data residency (Germany-only servers, no non-EU access)
- +All-in-one collaboration suite: tasks, chat, video calls, file sharing and whiteboards in one tool
- +Fast performance and responsive user interface
- +Perceived as cost-effective for the feature set
Limitations
- −Limited global adoption and brand recognition outside Europe, leading to resistance from users of established tools like Slack or Teams
- −Mobile app lacks functionality and user-friendliness compared to desktop experience
- −Customization options are restricted
- −Pricing structure may not clearly communicate value for all features (e.g., Kanban or list views)
Slack
Strengths
- +Highly customizable with extensive app integrations
- +Intuitive interface for team collaboration
- +Strong search functionality for past messages
- +Reliable uptime and performance
Limitations
- −Can become expensive for large teams
- −Steep learning curve for advanced features
- −Notifications can be overwhelming
- −Limited message history in free tier
Data residency & compliance
Stackfield
Slack
EU data residency
Yes, for all customers
Available on some plansEU data residency is available only on the most expensive plans.
Transfer mechanism
Not required — data stays in the EU
Standard Contractual Clauses
Certifications
ISO 27001, ISO 27017, ISO 27018
ISO 27001, ISO 27017, ISO 27018, SOC 2 Type II
Pricing
Stackfield
- Starter €9 per user/month (annual, min. 5 users) billed annuallyUp to 10 users · Max 3 rooms · 6 GB storage
- Business €14 per user/month (annual, min. 5 users) billed annuallyUnlimited users and rooms · 6 GB storage
- Premium €18 per user/month (annual, min. 5 users) billed annuallyVideo conferencing (up to 30 participants) · Whiteboards and Office file previews · Project portfolios and PERT charts
- Enterprise €28 per user/month (annual, min. 5 users) billed annuallySSO (SAML/Active Directory) · YubiKey 2FA · REST API provisioning
- Self-Hosted / On-Premise On request customFull control over data · Custom deployment
All prices exclude VAT. 17% discount for annual billing. 14-day free trial available.
Slack
- Free Free ForeverUp to 10,000 searchable messages · 10 app integrations · 1:1 voice and video calls
- Pro $7.25 per active user/month (billed annually)Unlimited message history · Unlimited app integrations · Group video calls up to 50 participants
- Business+ $12.50 per active user/month (billed annually)Advanced security features · Compliance exports · 99.99% guaranteed uptime
- Enterprise Grid On request CustomUnlimited workspaces · Enterprise-grade security and compliance · Data residency options
EU data residency is only available on Enterprise Grid. Pricing for this plan is custom and requires contacting sales.
Features
Stackfield
- Task & Project Management
- List, Kanban, Gantt, and PERT chart views, Subtasks, custom fields, checklists, and task templates, Milestones, dependencies, automatic scheduling, and critical path tracking, Built-in time tracking and global reports
- Team Communication & Meetings
- Real-time group chat, 1:1 messages, and threaded discussions, Audio/video conferencing (up to 30 participants), screen sharing, and emoji reactions, Meeting room planning and external scheduling, Interactive polls
- Knowledge & Document Management
- Central file library with version history, Preview for Microsoft Office and OpenOffice files, Real-time whiteboards with drawing, shapes, and text, Rich text editor and document templates
- Calendar & Work Organization
- Personal 'My Week' and 'Everything' views, Shared team calendars and appointment scheduling, External calendar subscriptions via iCal/WebCal
- Administration, Security & Compliance
- Client-side end-to-end encryption, ISO 27001/27017/27018 and BSI C5 certified hosting in Germany, Granular permissions (Member, Admin, Guest, External), IP whitelisting, 2FA (Authenticator Apps, YubiKey), SSO (SAML/Active Directory)
Slack
- Messaging & Collaboration
- Real-time messaging in channels and direct messages, Threaded conversations for organized discussions, File sharing and collaboration, Searchable message history
- Integrations & Workflow
- Connects with 2,400+ third-party apps, Customizable workflows with Slack Workflow Builder, Automated reminders and notifications, API access for custom integrations
- Security & Compliance
- Enterprise Key Management (EKM) for message encryption, Data loss prevention (DLP) integrations, Compliance with GDPR, HIPAA, and FINRA, Two-factor authentication (2FA) enforcement