Stackfield is the Munich-based end-to-end-encrypted team-collaboration platform operated by Stackfield GmbH (Maximiliansplatz 17, 80333 Munich; HRB 199536 Local Court Munich; VAT DE283871998; managing director Cristian Mudure). Founded in 2012 by Christian Mudra and Christopher Diesing, the company serves 10,000+ companies with a single workspace that combines team chat, tasks, project management, document sharing, whiteboards, video conferencing, and email forwarding, positioned explicitly as the European E2E-encrypted alternative to Slack, Microsoft Teams, Asana, and Basecamp.
Compliance posture is among the strongest in the project-management category. The product is end-to-end encrypted with AES-256 applied in the browser before content is transmitted, meaning even Stackfield's own employees cannot read customer messages, files, or tasks. The company holds ISO/IEC 27001 certification and BSI C5 (the German government's Cloud Computing Compliance Criteria Catalogue), the same certification combination carried by Hetzner, IONOS, and STACKIT in the hosting category. All customer data is stored exclusively in German data centres with location-independent backup. In 2024 Stackfield raised a double-digit-million investment to scale the privacy-first product; founder-led, with no US-VC / US-PE involvement on record.
Pricing in EUR is straightforward: Starter €9/user/month (up to 10 users, 6 GB storage, 3 rooms); Business €14/user/month (unlimited rooms and users); Premium €18/user/month (most popular: whiteboards, email forwarding, full video conferencing); Enterprise €28/user/month (SSO, API provisioning, unlimited organisations). 14-day trial of Premium with no credit card; AI add-on €3.90/user/month; Office editing add-on €2.40/user/month from Premium up. Best fit: German and DACH organisations that need a Slack/Teams replacement with E2E encryption by default, BSI C5 / ISO 27001 evidence for procurement, and a Munich-rooted vendor. Combined with Nextcloud (self-host) and MeisterTask (DE, listed below), Stackfield forms a strong "Microsoft 365 alternatives" cluster.