Lumo (Proton)

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

Unbabel

Portuguese AI translation platform combining neural MT with human quality assurance

Lumo (Proton)

Excellent

23/25

Unbabel

Excellent

22/25

Score Breakdown

DimensionLumo (Proton)Unbabel

Data Residency

Where is your data stored and processed?

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.

Unbabel: EU-based infrastructure operated by a Portuguese company; limited human editor data exposure by design

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.

4/5

EU-based infrastructure operated by a Portuguese company; limited human editor data exposure by design

Legal Jurisdiction

Which laws govern the company and your data?

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.

Unbabel: Portuguese Lda, EU-incorporated, no US parent, subject to Portuguese and EU law

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.

5/5

Portuguese Lda, EU-incorporated, no US parent, subject to Portuguese and EU law

Data Retention & Training

Is your data used for model training?

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

Unbabel: No training on customer data; clear data segmentation in human editing workflow; DPA available

5/5

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

4/5

No training on customer data; clear data segmentation in human editing workflow; DPA available

Certifications

ISO 27001, SOC 2, Cyber Essentials, etc.

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.

Unbabel: ISO 27001 and SOC 2 Type II certified — strong for a European scale-up

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.

4/5

ISO 27001 and SOC 2 Type II certified — strong for a European scale-up

Regulatory Fit

Suitability for regulated industries and professional services

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.

Unbabel: Excellent EU fit; ISO 27001 + SOC 2 + EU jurisdiction makes it suitable for regulated industries

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.

5/5

Excellent EU fit; ISO 27001 + SOC 2 + EU jurisdiction makes it suitable for regulated industries

Total Score

23/25

22/25

Best For

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.

Unbabel

Best for EU-headquartered organisations needing maximum data sovereignty; organisations requiring broad certification coverage (ISO 27001, SOC 2 Type II, GDPR); regulated industries (CNPD, CNIL); privacy-conscious teams who need strong data retention controls.

Detailed Comparison

Lumo (Proton) vs Unbabel: Trust & Compliance Comparison

Lumo (Proton) (Proton, CH) scores 23/25 overall with a Gold (Excellent) trust badge. Privacy-first AI assistant from the makers of ProtonMail, with Swiss jurisdiction and zero-access encryption. Unbabel (Unbabel, PT) scores 22/25 with a Gold (Excellent) trust badge. Portuguese AI translation platform combining neural MT with human quality assurance.

Dimension-by-Dimension Breakdown

#### Data Residency

Lumo (Proton) leads with 5/5 vs 4/5.

●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.

●Unbabel (4/5): EU-based infrastructure operated by a Portuguese company; limited human editor data exposure by design

#### Legal Jurisdiction

Both score equally at 5/5.

●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.

●Unbabel (5/5): Portuguese Lda, EU-incorporated, no US parent, subject to Portuguese and EU law

#### Data Retention & Training

Lumo (Proton) leads with 5/5 vs 4/5.

●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.

●Unbabel (4/5): No training on customer data; clear data segmentation in human editing workflow; DPA available

#### Certifications

Both score equally at 4/5.

●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.

●Unbabel (4/5): ISO 27001 and SOC 2 Type II certified — strong for a European scale-up

#### Regulatory Fit

Unbabel leads with 5/5 vs 4/5.

●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.

●Unbabel (5/5): Excellent EU fit; ISO 27001 + SOC 2 + EU jurisdiction makes it suitable for regulated industries

Certifications at a Glance

Certification	Lumo (Proton)	Unbabel
GDPR	No	Yes
ISO 27001	Yes	Yes
SOC 2	Yes	No
SOC 2 Type II	No	Yes

Overall Verdict

Lumo (Proton) and Unbabel are closely matched on trust and compliance, with scores of 23/25 and 22/25 respectively. The right choice depends on your specific regulatory requirements and existing technology stack.

Frequently Asked Questions

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

Lumo (Proton) has a TrustKit score of 23/25 while Unbabel scores 22/25. Lumo (Proton) currently rates higher across data residency, legal jurisdiction, data retention, certifications, and regulatory fit.

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

Lumo (Proton) scores 5/5 for data residency (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.), while Unbabel scores 4/5 (EU-based infrastructure operated by a Portuguese company; limited human editor data exposure by design).

Are Lumo (Proton) and Unbabel GDPR compliant?

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

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