Nozbe vs Stackfield

Compare Nozbe and Stackfield on capabilities, jurisdiction, assurance, and fit for European buyers.

Both listed as alternatives to: Microsoft Teams, Slack

Nozbe

Poland· Groupware

Needs review

Shortlist Nozbe when a small remote or hybrid team wants a simple Polish SaaS for GTD-style projects, tasks, and comments—with German primary hosting and a public B2B DPA. Skip when you need self-hosting, published ISO/SOC attestation, enterprise portfolio PM, or a path free of US-group cloud/SaaS subprocessors; consider Nextcloud (self-host) or a chat-first peer such as Fleep instead.

EU-operated (Poland)Task-based collaborationMulti-workspaceOffline appsPublic B2B DPAFree tier + seat SaaS

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Stackfield

Germany· Groupware

Needs review

Shortlist Stackfield when you need a German-operated all-in-one (chat + PM + meetings + docs) with optional client-side E2E rooms, Germany hosting, and a BSI C5 / ISO story for regulated teams. Skip when you need open-source DIY (prefer Nextcloud), Slack-scale app ecosystem depth, or pure secure messaging without project management (consider ginlo Business).

EU-operated (DE)Optional client-side E2EGermany hosting (IONOS)ISO 27001 + BSI C5 (claimed)Commercial on-premiseChat + PM + video

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Highlighted rows differ between the two products.

Nozbe vs Stackfield: Snapshot
Feature	Nozbe	Stackfield
Country of origin	Poland	Germany
Category	Groupware	Groupware
Open source	No	No
Self-hosted	No	Yes
Headquarters	Poland	Germany
Legal entity	NOZBE sp. z o.o., ul. Spacerowa 31/5, 81-521 Gdynia, Poland (NIP PL5862383639, KRS 0000987269)	Stackfield GmbH, Maximiliansplatz 17, 80333 München, Germany
Governing law	Poland	Not listed
US parent / control	No known US parent	No known US parent
CLOUD Act exposure (indicative)	Medium	Medium
Hosting / residency	Primary app servers on Hetzner (Germany). Encrypted DB backups and file storage on Amazon S3 (Paris/Frankfurt; DPA also cites AWS/Hetzner regions in Germany, Ireland, France). Cloudflare for printing. Privacy also lists Mailgun, GetResponse, Google Analytics/Sign-In/GCal, Facebook marketing, Gmail/Sugester support, Stripe/Verifone/Przelewy24 payments.	Product data claimed stored in Germany; infrastructure provider IONOS SE (DE). Vendor states no AWS/GCP/Azure product subcontractors. Named EU processors: Inxmail (email, DE), Myra Security (edge protection, DE). Mobile push uses Apple APNs and Google push services (US platforms). Optional admin-enabled Giphy (US). Marketing site uses Google/Bing ads (not workspace content path). Optional customer-keyed external AI leaves Stackfield’s IONOS-hosted model path.
Summary	Polish task and project management SaaS with task-based communication, multi-workspace separation, offline apps, and vendor-hosted EU primary infrastructure.	German all-in-one collaboration suite (chat, tasks/projects, video, docs) with optional client-side end-to-end encryption and Germany-hosted cloud or commercial on-premise.
Tags	project-management collaboration gdpr task-management gtd remote-work poland	project-management collaboration gdpr team-chat end-to-end-encryption germany on-premise iso-27001 bsi-c5

At a glance: Nozbe vs Stackfield
At a glance	Nozbe	Stackfield
HQ	Gdynia, Poland	Munich, Germany
Legal entity	NOZBE sp. z o.o.	Stackfield GmbH (HRB 199536)
Founded	2007 (vendor history)	2012 (vendor claim)
Deployment	Multi-tenant SaaS (not self-hosted)	SaaS cloud + commercial on-premise
Primary hosting	Hetzner, Germany	Not listed
Commercial model	Free tier + seat-based Premium/Business	Seat-based plans; trial; AI/Office add-ons
Hosting	Not listed	Germany; IONOS SE (vendor-named)
Open source	Not listed	No

Key capabilities: Nozbe vs Stackfield
Key capabilities	Nozbe	Stackfield
EU-operated (Poland)	Yes	Yes
Task-based collaboration	Yes	Not listed
Multi-workspace	Yes	Not listed
Offline apps	Yes	Not listed
Public B2B DPA	Yes	Not listed
Free tier + seat SaaS	Yes	Not listed
Optional client-side E2E	Not listed	Yes
Germany hosting (IONOS)	Not listed	Yes
ISO 27001 + BSI C5 (claimed)	Not listed	Yes
Commercial on-premise	Not listed	Yes
Chat + PM + video	Not listed	Yes

Nozbe

Task-based communication (projects → tasks → comments)
Work is organized as projects containing tasks; discussion, checklists, @mentions, reactions, attachments, and task links live on the task so context does not scatter across email or chat. Suited to teams that want asynchronous ownership without a heavy workflow engine.
Multiple workspaces for work and life
Create separate spaces for a company, department, or personal life under one account. Free plan starts with one free space; Premium adds capacity; Business is positioned for unlimited workspaces when you run several teams or businesses.
Email-to-task capture and project templates
Each user can forward mail to a personal Nozbe address to turn messages and attachments into tasks. Recurring workflows (onboarding, reports, orders) can be saved as project templates and re-instantiated instead of rebuilding checklists by hand.
Offline-capable multi-platform apps
Dedicated clients for Windows, Mac, iOS, and Android plus the web app at nozbe.app; About also lists Linux. Apps sync with servers in Germany and are marketed as usable offline for hybrid and mobile work.
Shared and joint projects across spaces
Invite-only projects (Premium) restrict visibility inside a space; joint projects let you collaborate with other Nozbe spaces (clients, subcontractors) without migrating everyone onto one workspace. Complements space-level multi-tenant style separation.
Optional AI project bootstrap and time tracking
Premium-oriented features include Create using AI (describe a project or import CSV to generate tasks), time tracking, and richer history/storage limits than Free. Confirm current plan gates on the official feature comparison before procurement.

Stackfield

Optional client-side E2E rooms (AES-256 + RSA-2048)
Rooms and direct messages can add browser-side end-to-end encryption so Stackfield cannot read covered content at rest. Admins can force E2E, ban it, or let creators choose. Trade-offs include room-password recovery after login resets, limited lock-screen/email previews, and client-side search cost—plan org policy before migrating sensitive rooms.
Tasks, Gantt, portfolios, and workflows in the same rooms as chat
List/Kanban/Gantt views, milestones, dependencies, automatic scheduling, critical path, custom fields, time tracking, reports, and project portfolios sit next to room chat and discussions. Suited to PMOs that refuse a separate tool silo; less deep than specialist ALM suites for software engineering pipelines.
Video conferences, screen share, and guest/external roles
Built-in audio/video/screen-sharing (plan-dependent) plus guest and external roles that only see assigned rooms. Useful for law firms, agencies, and public-sector projects with outside counsel or contractors without granting full org access.
Germany cloud (IONOS) plus commercial on-premise
Cloud tenants store data in German data centres; Stackfield names IONOS SE as infrastructure provider and claims no AWS/GCP/Azure product subprocessors. On-premise is a paid subscription (vendor-installed/updated, high minimum seat count) for air-gapped or policy-bound estates—test first in cloud; local PoC installs are not offered.
Enterprise access controls and in-product DPA
Higher tiers add enforced 2FA (including YubiKey options), IP allowlists, password policies, SSO, API provisioning, org-wide exports, and compliance-confirmation workflows. Organisation admins can conclude the GDPR DPA inside settings and download the signed PDF once per organisation.

Assurance & compliance: Nozbe vs Stackfield
Assurance & compliance	Nozbe	Stackfield
Independent security / no-logs audit	Not found Vendor describes restricted staff access and internal/external security tests; no public independent audit report found.	Partial Vendor claims regular penetration tests and APPVISORY Trusted App for mobile; no public independent no-logs or full security audit report found.
ISO 27001	Not found No ISO 27001 claim or certificate located on official site.	Vendor claimed Vendor states ISO 27001 (plus 27017/27018) with certificate download on security page; not independently registry-verified in this draft.
SOC 2 / SOC 3	Not found No SOC 2/3 report advertised on official legal/security pages.	Not found No SOC 2/3 claim found on primary security pages reviewed.
GDPR / EU data protection	Vendor claimed Polish controller; GDPR-oriented privacy terms; public Art. 28 DPA PDF; EU hosting for primary app data.	Vendor claimed EU controller Stackfield GmbH; Germany hosting claims; in-product DPA; public privacy policy with processor list fragments.
US CLOUD Act exposure (indicative)	Partial EU entity / no known US parent, but AWS S3 backups/files, Mailgun, Google, Facebook, Stripe/Verifone, and Cloudflare create US-group processing paths. Not legal advice.	Partial EU entity, no known US parent, core hosting claimed via IONOS DE without AWS/GCP/Azure. Residual paths: Apple/Google mobile push; optional Giphy; optional customer external AI. Assessment only—not legal advice.
Data processing agreement (B2B)	Vendor claimed Downloadable GDPR DPA at nozbe.com/gdpr; customer signs and returns. Also available on request via support language in privacy policy.	Vendor claimed Organisation admins can conclude DPA inside Organisation Settings and download signed PDF; one DPA per organisation.
EU AI Act	Not applicable Optional Create using AI feature; product is primarily task/project management, not an AI system as core offering. Reassess if AI features expand.	Not applicable Optional text-assist AI add-on; not an AI-centric product. Revisit if agents expand into high-risk use cases.
BSI C5	Not listed	Vendor claimed Vendor claims BSI C5 attestation on homepage and security page; obtain current report in procurement.

Considerations & known limitations: Nozbe vs Stackfield
Considerations & known limitations	Nozbe	Stackfield
US-group cloud and SaaS subprocessors	Medium Core tasks run on Hetzner DE, but encrypted backups/files use Amazon S3 and privacy lists Mailgun, Google, Facebook, Stripe/Verifone, and Cloudflare. EU HQ does not eliminate US-group provider exposure for procurement policies that ban those vendors.	Not listed
No public ISO/SOC or independent audit report	Medium Security practices are described by the vendor (encryption, backups, limited staff access, external tests) without published certificates. Enterprise security questionnaires may stall until documents are shared under NDA.	Not listed
SaaS-only; no self-host option	Medium Data and availability depend on Nozbe’s multi-tenant service. Air-gapped or customer-controlled deployment is not offered publicly.	Not listed
Narrow feature surface vs enterprise PM	Low Deliberately simple projects/tasks/comments model may lack portfolio, advanced automation, or complex permission matrices expected in large PMO tools—confirm fit before migrating from Asana/Jira-class suites.	Not listed
E2E is optional and irreversible per room	Not listed	Medium Without org policy, creators may leave sensitive rooms unencrypted. Encryption mode cannot be changed after creation; password recovery after login reset needs disciplined room-key handling.
Mobile push and optional US integrations	Not listed	Medium Privacy policy documents Apple/Google push for mobile notifications and optional Giphy (US). Even with German content hosting, notification metadata and optional GIF traffic can touch US platforms—document in DPIA.
Certifications vendor-asserted	Not listed	Low ISO and BSI C5 are claimed with a downloadable certificate; treat as claimed until your auditor verifies scope, dates, and which systems are in-bounds.
On-premise is commercial, not DIY open source	Not listed	Low Self-host means a paid on-prem product with vendor install/update and high seat minimums—not a free community edition. Budget implementation and support tickets accordingly.
AI features require content decryption for processing	Not listed	Medium Stackfield AI decrypts client-side content for the request path (then claims immediate deletion). External AI via customer keys is a separate transfer. Disable AI if zero-knowledge must never leave the client.

Fit

Nozbe

Best fit when

Small businesses and service teams that want projects → tasks → comments instead of channel chat or heavy PM suites
Remote/hybrid groups that need coherent desktop and mobile clients with offline capture
Buyers who want a Polish legal entity, German primary hosting, and a downloadable Art. 28 DPA
People who separate work and personal life via multiple workspaces in one product
Teams that capture actionable email as tasks and reuse project templates for repeat client work

Poor fit when

Organizations that require self-hosted or fully air-gapped deployment
Procurement that mandates public ISO 27001 or SOC 2 reports before shortlisting
Enterprises needing portfolio resource management, complex automations, or deep Kanban/Gantt tooling
Buyers whose policy forbids US-group cloud providers even for EU-region backups, email, or analytics
Teams seeking a full Microsoft 365 / Google Workspace replacement (mail, docs, meetings) rather than a task system

Consider instead when

When: You must self-host collaboration data and control subprocessors yourself
Consider: Nextcloud
Broader content collaboration hub; operational ownership shifts to your team.
When: You need Swiss-hosted classic groupware (mail, calendar, contacts) more than task PM
Consider: Kolab Now
Different product shape; not a drop-in Nozbe substitute.
When: Chat-first team messaging with conversation tasks is enough and you prefer Estonia HQ
Consider: Fleep
Messenger-centric; weaker as a full multi-workspace project system.
When: Your org is already standardized on Microsoft collaboration and only needs lightweight tasks
Consider: Microsoft Teams / Microsoft 365 Planner-style workflows
Lower integration friction; different jurisdiction and product philosophy.

Stackfield

Best fit when

German/EU orgs that want one tool for projects and communication instead of Slack + separate PM
Teams that need optional zero-knowledge rooms for highly sensitive matters (legal, M&A, HR, clinical ops)
Buyers requiring German legal entity, DPA in-product, and claimed ISO/BSI C5 for procurement questionnaires
Public sector, banking, insurance, and professional services evaluating cloud with an on-prem exit path
Orgs that will enforce 2FA/SSO/IP allowlists and guest-only access for externals

Poor fit when

Teams that need always-on E2E with full rich push previews and third-party calendar feeds without trade-offs
Engineering orgs standardised on Jira/GitHub-style ALM depth and automation
Buyers who require fully open-source, community-supported self-host without a commercial on-prem contract
Global enterprises whose primary requirement is the Slack/Teams integration marketplace
Very small teams needing only free-tier messaging with no seat-based SaaS commitment

Consider instead when

When: You need open-source self-host and full operational control of files/collab apps
Consider: Nextcloud
More DIY ops; broader app ecosystem; different PM depth.
When: You mainly need regulated secure messaging, not Gantt/portfolios
Consider: ginlo Business
Messaging-first German B2B chat; thinner project suite.
When: You already run Microsoft 365 and identity is non-negotiable
Consider: Microsoft Teams (incumbent) or stay in M365 with EU data boundaries
Teams wins on suite lock-in; loses on independent German vendor + optional client E2E story.
When: You want lighter EU team chat without full PM suite
Consider: Fleep
Chat-centric; different residency/subprocessor profile—verify separately.

Open questions for due diligence

Nozbe

Will the vendor provide a current subprocessor list with legal entities and transfer mechanisms (SCCs) for AWS, Mailgun, Google, and payment providers?
Are independent penetration-test or ISO/SOC materials available under NDA for enterprise procurement?
What is the exact production region set today for Ireland vs Germany/France relative to the DPA wording?
What retention, export formats, and support SLAs apply on Business vs Premium for regulated clients?
How is optional Nozbe AI implemented (model provider, data used for training, opt-out)?

Stackfield

Will the vendor provide the current BSI C5 report, ISO certificate scope, and full subprocessor annex under NDA if not already in the DPA PDF?
Which fields remain outside E2E (metadata, search indexes, analytics) in your planned room configuration?
For mobile fleets: is APNs/FCM push acceptable, or must notifications be disabled/restricted?
On-premise: exact supported OS/hypervisor matrix, backup model, and upgrade cadence for your estate?
Is Stackfield AI (or customer external AI) allowed under your policy for rooms that contain special-category data?