Phrase

Czech-founded AI translation management platform for global software and content teams

Lumo (Proton)

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

Phrase

Strong

20/25

Lumo (Proton)

Excellent

23/25

Score Breakdown

DimensionPhraseLumo (Proton)

Data Residency

Where is your data stored and processed?

Phrase: Primary infrastructure in EU data centres; third-party MT providers may process content in their own regions.

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.

4/5

Primary infrastructure in EU data centres; third-party MT providers may process content in their own regions.

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?

Phrase: Czech s.r.o. incorporated and operating under EU law with full GDPR applicability.

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

Czech s.r.o. incorporated and operating under EU law with full GDPR applicability.

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?

Phrase: Customer translation memories and content explicitly not used for model training; configurable retention available.

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

4/5

Customer translation memories and content explicitly not used for model training; configurable retention 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.

Certifications

ISO 27001, SOC 2, Cyber Essentials, etc.

Phrase: ISO 27001 certified; SOC 2 not yet publicly confirmed as of 2025.

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.

3/5

ISO 27001 certified; SOC 2 not yet publicly confirmed as of 2025.

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

Phrase: Strong EU fit with comprehensive DPA, SCCs for third-party providers, and audit logging for regulated content.

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.

4/5

Strong EU fit with comprehensive DPA, SCCs for third-party providers, and audit logging for regulated content.

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

20/25

23/25

Best For

Phrase

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.

Lumo (Proton)

Best for EU-headquartered organisations needing maximum data sovereignty; regulated industries (UOOU, CNIL); privacy-conscious teams who need strong data retention controls.

Detailed Comparison

Lumo (Proton) vs Phrase: 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. Phrase (Phrase, CZ) scores 20/25 with a Silver (Strong) trust badge. Czech-founded AI translation management platform for global software and content teams.

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.

●Phrase (4/5): Primary infrastructure in EU data centres; third-party MT providers may process content in their own regions.

#### 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.

●Phrase (5/5): Czech s.r.o. incorporated and operating under EU law with full GDPR applicability.

#### 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.

●Phrase (4/5): Customer translation memories and content explicitly not used for model training; configurable retention available.

#### Certifications

Lumo (Proton) leads with 4/5 vs 3/5.

●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.

●Phrase (3/5): ISO 27001 certified; SOC 2 not yet publicly confirmed as of 2025.

#### Regulatory Fit

Both score equally at 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.

●Phrase (4/5): Strong EU fit with comprehensive DPA, SCCs for third-party providers, and audit logging for regulated content.

Certifications at a Glance

Certification	Lumo (Proton)	Phrase
ISO 27001	Yes	Yes
SOC 2	Yes	No

Overall Verdict

Lumo (Proton) has a clear trust advantage, scoring 23/25 compared to Phrase's 20/25. Lumo (Proton) particularly excels in data residency, data retention & training, certifications.

Frequently Asked Questions

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

Phrase has a TrustKit score of 20/25 while Lumo (Proton) scores 23/25. Lumo (Proton) currently rates higher across data residency, legal jurisdiction, data retention, certifications, and regulatory fit.

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

Phrase scores 4/5 for data residency (Primary infrastructure in EU data centres; third-party MT providers may process content in their own regions.), 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 Phrase and Lumo (Proton) GDPR compliant?

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

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