GreenPT

EU-only AI chat platform powered by renewable energy with no external API dependencies

Lumo (Proton)

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

GreenPT

Strong

19/25

Lumo (Proton)

Excellent

23/25

Score Breakdown

DimensionGreenPTLumo (Proton)

Data Residency

Where is your data stored and processed?

GreenPT: All models run on own servers hosted by Scaleway in France. No external API dependencies — data never leaves their EU infrastructure. Genuine EU data sovereignty.

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

All models run on own servers hosted by Scaleway in France. No external API dependencies — data never leaves their EU infrastructure. Genuine EU data sovereignty.

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?

GreenPT: Dutch BV incorporation under EU law. No US parent company, no US API dependencies, no CLOUD Act exposure. One of the purest EU sovereignty stories available.

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

Dutch BV incorporation under EU law. No US parent company, no US API dependencies, no CLOUD Act exposure. One of the purest EU sovereignty stories available.

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?

GreenPT: Data never shared with third parties. Models run locally on own servers. No external API calls means no data leakage to US providers. Specific retention policies not publicly detailed.

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

Data never shared with third parties. Models run locally on own servers. No external API calls means no data leakage to US providers. Specific retention policies not publicly detailed.

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.

GreenPT: Hosted on Scaleway ISO 27001 certified infrastructure. GreenPT itself does not hold formal certifications. Expected for a small bootstrapped company.

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.

2/5

Hosted on Scaleway ISO 27001 certified infrastructure. GreenPT itself does not hold formal certifications. Expected for a small bootstrapped company.

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

GreenPT: Strong EU sovereignty positioning and genuinely EU-only data handling. Lack of own certifications limits enterprise procurement. Excellent conceptual fit for sovereignty-focused organisations.

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.

3/5

Strong EU sovereignty positioning and genuinely EU-only data handling. Lack of own certifications limits enterprise procurement. Excellent conceptual fit for sovereignty-focused organisations.

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

19/25

23/25

Best For

GreenPT

Best for EU-headquartered organisations needing maximum data sovereignty; privacy-conscious teams who need strong data retention controls.

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; enterprises requiring SSO integration.

Detailed Comparison

GreenPT vs Lumo (Proton): Trust & Compliance Comparison

GreenPT (GreenPT, NL) scores 19/25 overall with a Silver (Strong) trust badge. EU-only AI chat platform powered by renewable energy with no external API dependencies. 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.

●GreenPT (5/5): All models run on own servers hosted by Scaleway in France. No external API dependencies — data never leaves their EU infrastructure. Genuine EU data sovereignty.

●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.

●GreenPT (5/5): Dutch BV incorporation under EU law. No US parent company, no US API dependencies, no CLOUD Act exposure. One of the purest EU sovereignty stories available.

●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

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

●GreenPT (4/5): Data never shared with third parties. Models run locally on own servers. No external API calls means no data leakage to US providers. Specific retention policies not publicly detailed.

●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

Lumo (Proton) leads with 4/5 vs 2/5.

●GreenPT (2/5): Hosted on Scaleway ISO 27001 certified infrastructure. GreenPT itself does not hold formal certifications. Expected for a small bootstrapped company.

●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

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

●GreenPT (3/5): Strong EU sovereignty positioning and genuinely EU-only data handling. Lack of own certifications limits enterprise procurement. Excellent conceptual fit for sovereignty-focused organisations.

●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	GreenPT	Lumo (Proton)
ISO 27001	No	Yes
SOC 2	No	Yes

Overall Verdict

Lumo (Proton) has a clear trust advantage, scoring 23/25 compared to GreenPT's 19/25. Lumo (Proton) particularly excels in data retention & training, certifications, regulatory fit.

Frequently Asked Questions

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

GreenPT has a TrustKit score of 19/25 while Lumo (Proton) scores 23/25. Lumo (Proton) currently rates higher across data residency, legal jurisdiction, data retention, certifications, and regulatory fit.

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

GreenPT scores 5/5 for data residency (All models run on own servers hosted by Scaleway in France. No external API dependencies — data never leaves their EU infrastructure. Genuine EU data sovereignty.), 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 GreenPT and Lumo (Proton) GDPR compliant?

Both tools are assessed across five compliance dimensions. GreenPT has a regulatory fit score of 3/5 and Lumo (Proton) scores 4/5. Check the full comparison above for a detailed breakdown.

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