Aleph Alpha

Sovereign AI for European enterprises and governments

Lumo (Proton)

Privacy-first AI assistant from the makers of ProtonMail, with Swiss jurisdiction and zero-access encryption

Aleph Alpha

Excellent

24/25

Lumo (Proton)

Excellent

23/25

Score Breakdown

DimensionAleph AlphaLumo (Proton)

Data Residency

Where is your data stored and processed?

Aleph Alpha: Full data sovereignty with on-premise, private cloud, and air-gapped deployment options. Data never leaves the customer's chosen environment.

Lumo (Proton): Data hosted in Proton's own data centres in Germany and Norway. Zero-access encryption means even Proton cannot read conversation content. No US infrastructure dependency.

5/5

Full data sovereignty with on-premise, private cloud, and air-gapped deployment options. Data never leaves the customer's chosen environment.

5/5

Data hosted in Proton's own data centres in Germany and Norway. Zero-access encryption means even Proton cannot read conversation content. No US infrastructure dependency.

Legal Jurisdiction

Which laws govern the company and your data?

Aleph Alpha: German GmbH entity fully subject to EU and German law. No exposure to US data access frameworks. Ideal for European sovereignty requirements.

Lumo (Proton): Swiss incorporation provides one of the strongest privacy jurisdictions globally. Outside US CLOUD Act reach. Swiss FADP and GDPR adequacy. Proton has a decade-long track record of defending user privacy.

5/5

German GmbH entity fully subject to EU and German law. No exposure to US data access frameworks. Ideal for European sovereignty requirements.

5/5

Swiss incorporation provides one of the strongest privacy jurisdictions globally. Outside US CLOUD Act reach. Swiss FADP and GDPR adequacy. Proton has a decade-long track record of defending user privacy.

Data Retention & Training

Is your data used for model training?

Aleph Alpha: Customer retains complete control over all data. No data is retained by Aleph Alpha in on-premise deployments. Enterprise agreements provide full transparency.

Lumo (Proton): Zero-access encryption on conversations. User data explicitly never used for model training. Open-source code enables independent verification of privacy claims.

5/5

Customer retains complete control over all data. No data is retained by Aleph Alpha in on-premise deployments. Enterprise agreements provide full transparency.

5/5

Zero-access encryption on conversations. User data explicitly never used for model training. Open-source code enables independent verification of privacy claims.

Certifications

ISO 27001, SOC 2, Cyber Essentials, etc.

Aleph Alpha: Holds ISO 27001 and BSI C5 certifications. Strong security posture aligned with German and EU government requirements.

Lumo (Proton): ISO 27001 and SOC 2 at Proton AG organisational level. Strong for a consumer-facing privacy product. ISO 27701 would further strengthen the posture.

4/5

Holds ISO 27001 and BSI C5 certifications. Strong security posture aligned with German and EU government requirements.

4/5

ISO 27001 and SOC 2 at Proton AG organisational level. Strong for a consumer-facing privacy product. ISO 27701 would further strengthen the posture.

Regulatory Fit

Suitability for regulated industries and professional services

Aleph Alpha: Purpose-built for EU-regulated environments. Backed by German industrial investors. Trusted by European government organizations for sovereign AI deployments.

Lumo (Proton): Excellent fit for privacy-sensitive professionals in legal and financial services. Swiss jurisdiction, zero-access encryption, and no training on user data address key regulatory concerns. Not EU-incorporated but GDPR adequate.

5/5

Purpose-built for EU-regulated environments. Backed by German industrial investors. Trusted by European government organizations for sovereign AI deployments.

4/5

Excellent fit for privacy-sensitive professionals in legal and financial services. Swiss jurisdiction, zero-access encryption, and no training on user data address key regulatory concerns. Not EU-incorporated but GDPR adequate.

Total Score

24/25

23/25

Best For

Aleph Alpha

Best for EU-headquartered organisations needing maximum data sovereignty; regulated industries (BaFin, BSI); privacy-conscious teams who need strong data retention controls; organisations that need self-hosted or on-premise deployment.

Lumo (Proton)

Best for EU-headquartered organisations needing maximum data sovereignty; regulated industries (legal, financial-services); privacy-conscious teams who need strong data retention controls; organisations that need self-hosted or on-premise deployment; teams on a tight budget.

Detailed Comparison

Aleph Alpha vs Lumo (Proton): Trust & Compliance Comparison

Aleph Alpha (Aleph Alpha, DE) scores 24/25 overall with a Gold (Excellent) trust badge. Sovereign AI for European enterprises and governments. Lumo (Proton) (Proton, CH) scores 23/25 with a Gold (Excellent) trust badge. Privacy-first AI assistant from the makers of ProtonMail, with Swiss jurisdiction and zero-access encryption.

Dimension-by-Dimension Breakdown

#### Data Residency

Both score equally at 5/5.

●Aleph Alpha (5/5): Full data sovereignty with on-premise, private cloud, and air-gapped deployment options. Data never leaves the customer's chosen environment.

●Lumo (Proton) (5/5): Data hosted in Proton's own data centres in Germany and Norway. Zero-access encryption means even Proton cannot read conversation content. No US infrastructure dependency.

#### Legal Jurisdiction

Both score equally at 5/5.

●Aleph Alpha (5/5): German GmbH entity fully subject to EU and German law. No exposure to US data access frameworks. Ideal for European sovereignty requirements.

●Lumo (Proton) (5/5): Swiss incorporation provides one of the strongest privacy jurisdictions globally. Outside US CLOUD Act reach. Swiss FADP and GDPR adequacy. Proton has a decade-long track record of defending user privacy.

#### Data Retention & Training

Both score equally at 5/5.

●Aleph Alpha (5/5): Customer retains complete control over all data. No data is retained by Aleph Alpha in on-premise deployments. Enterprise agreements provide full transparency.

●Lumo (Proton) (5/5): Zero-access encryption on conversations. User data explicitly never used for model training. Open-source code enables independent verification of privacy claims.

#### Certifications

Both score equally at 4/5.

●Aleph Alpha (4/5): Holds ISO 27001 and BSI C5 certifications. Strong security posture aligned with German and EU government requirements.

●Lumo (Proton) (4/5): ISO 27001 and SOC 2 at Proton AG organisational level. Strong for a consumer-facing privacy product. ISO 27701 would further strengthen the posture.

#### Regulatory Fit

Aleph Alpha leads with 5/5 vs 4/5.

●Aleph Alpha (5/5): Purpose-built for EU-regulated environments. Backed by German industrial investors. Trusted by European government organizations for sovereign AI deployments.

●Lumo (Proton) (4/5): Excellent fit for privacy-sensitive professionals in legal and financial services. Swiss jurisdiction, zero-access encryption, and no training on user data address key regulatory concerns. Not EU-incorporated but GDPR adequate.

Certifications at a Glance

Certification	Aleph Alpha	Lumo (Proton)
BSI C5	Yes	No
ISO 27001	Yes	Yes
SOC 2	No	Yes

Overall Verdict

Aleph Alpha and Lumo (Proton) are closely matched on trust and compliance, with scores of 24/25 and 23/25 respectively. The right choice depends on your specific regulatory requirements and existing technology stack.

Frequently Asked Questions

Which is better for EU compliance, Aleph Alpha or Lumo (Proton)?

Aleph Alpha has a TrustKit score of 24/25 while Lumo (Proton) scores 23/25. Aleph Alpha currently rates higher across data residency, legal jurisdiction, data retention, certifications, and regulatory fit.

How do Aleph Alpha and Lumo (Proton) compare on data residency?

Aleph Alpha scores 5/5 for data residency (Full data sovereignty with on-premise, private cloud, and air-gapped deployment options. Data never leaves the customer's chosen environment.), while Lumo (Proton) scores 5/5 (Data hosted in Proton's own data centres in Germany and Norway. Zero-access encryption means even Proton cannot read conversation content. No US infrastructure dependency.).

Are Aleph Alpha and Lumo (Proton) GDPR compliant?

Both tools are assessed across five compliance dimensions. Aleph Alpha has a regulatory fit score of 5/5 and Lumo (Proton) scores 4/5. Check the full comparison above for a detailed breakdown.

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