CLUE#ZO vs Whisper

Side-by-side facts for CLUE#ZO and Whisper, sourced from vendor-published materials. Both platforms market themselves for EU Directive 2019/1937 compliance.

At a glance

CLUE#ZO

German digital whistleblowing system from CAS Concepts and Solutions AG, delivered on SAP Business Technology Platform with integration to SAP S/4HANA and chatbot-guided report intake.

Headquarters: Hamburg, Germany
Pricing: Basic EUR 99/month (12 reports/year, 3 users); Standard EUR 299/month (50 reports/year, 6 users); Enterprise EUR 1,499/month (unlimited reports, 15 users). Prices are ex-VAT.
EU data hosting: EU (named data centre)
EU member states referenced: 1 of 27
Certifications: None published
AI on report content: Processes report content with AI / translation

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Whisper

Italian whistleblowing platform from Thorsoft with ACN-certified positioning and public annual pricing for up to 250 employees.

Headquarters: Legnano, Italy
Pricing: Whisper 100: €500/year + VAT for up to 100 employees; Whisper 250: €900/year + VAT for up to 250 employees; Enterprise: custom.
EU data hosting: Not disclosed
EU member states referenced: 1 of 27
Certifications: ISO 27001 + 4 more
AI on report content: No AI processing of report content

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Full facts, side by side

Full facts, side by side: CLUE#ZO and Whisper
Attribute	CLUE#ZO	Whisper
Headquarters	Hamburg, Germany	Legnano, Italy
Ownership	Private, CAS Concepts and Solutions AG (Hamburg, Commercial Register HRB 69127)	Thorsoft S.r.l.
Pricing	Basic EUR 99/month (12 reports/year, 3 users); Standard EUR 299/month (50 reports/year, 6 users); Enterprise EUR 1,499/month (unlimited reports, 15 users). Prices are ex-VAT.	Whisper 100: €500/year + VAT for up to 100 employees; Whisper 250: €900/year + VAT for up to 250 employees; Enterprise: custom.
Pricing model	Tiered (per employee)	Tiered (per employee)
Procurement model	Mixed	Self-serve sign-up
Free trial	No	No
EU data hosting	EU (named data centre) European data centres (vendor states ISO 27001 certified data centres); built on SAP Business Technology Platform	Not disclosed
EU member states referenced	1 of 27	1 of 27
EU reporting languages	Undisclosed	Partial
Total reporting languages	Undisclosed	2
AI on report content	Processes report content with AI / translation	No AI processing of report content
Certifications	None published	ACN certification (vendor-stated) ISO 9001 ISO 27001 ISO 27017 ISO 27018
National laws referenced	EU Directive 2019/1937 Germany (Hinweisgeberschutzgesetz, HinSchG)	Italy (D.Lgs 24/2023) Italy (ANAC directives) EU whistleblowing requirements
Anonymous reporting	✓	✓
Case management	✓	✓
Multi-channel intake	—	✓
Public API	—	—
GDPR (vendor claim)	✓	✓
EU Directive 2019/1937 (vendor claim)	✓	✓
Last verified	19 July 2026	24 May 2026

How CLUE#ZO and Whisper differ

CLUE#ZO can host report data inside the EU, while Whisper does not publish an EU hosting option. CLUE#ZO references 1 of the 27 EU member states and Whisper references 1. Whisper lists ISO 27001 certification; CLUE#ZO does not. Whisper offers self-serve sign-up, whereas CLUE#ZO routes buyers through a demo or sales process. CLUE#ZO processes report content with AI, while Whisper does not. Both market themselves for EU Directive 2019/1937 compliance, so the better fit depends on your priorities around data residency, certification, pricing transparency, and use of AI.

CLUE#ZO vs Whisper: common questions

Does CLUE#ZO or Whisper host whistleblower data in the EU?

CLUE#ZO can host report data inside the EU, while Whisper does not publish an EU hosting option.

How many EU member states do CLUE#ZO and Whisper cover?

CLUE#ZO references 1 of the 27 EU member states and Whisper references 1.

Is CLUE#ZO or Whisper ISO 27001 certified?

Whisper lists ISO 27001 certification; CLUE#ZO does not.

How do CLUE#ZO and Whisper pricing and sign-up compare?

CLUE#ZO is priced at Basic EUR 99/month (12 reports/year, 3 users); Standard EUR 299/month (50 reports/year, 6 users); Enterprise EUR 1,499/month (unlimited reports, 15 users). Prices are ex-VAT.. Whisper is priced at Whisper 100: €500/year + VAT for up to 100 employees; Whisper 250: €900/year + VAT for up to 250 employees; Enterprise: custom.. Whisper offers self-serve sign-up, whereas CLUE#ZO routes buyers through a demo or sales process.

Do CLUE#ZO or Whisper use AI on whistleblower reports?

CLUE#ZO processes report content with AI, while Whisper does not.

Another option in this directory

CLUE#ZO and Whisper are two of the platforms indexed here. If your shortlist is still open, one more worth comparing — with a different set of tradeoffs:

EthicsPortal

Whistleblower reporting portal hosted on Hetzner in Germany. Flat €60/month plan.

Headquarters: Poland
Pricing: €60/month, or €41.67/month billed annually (€500/year)
EU data hosting: EU (named data centre)
EU member states referenced: All 27
Certifications: ISO 27001
AI on report content: No AI processing of report content

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Compare this tool against other platforms in the directory.

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