Kagi

Privacy-first AI search engine with no ads and no tracking

Noxtua

Europe's sovereign legal AI with its own European-trained legal LLM

Kagi

Caution

11/25

Noxtua

Excellent

25/25

Score Breakdown

DimensionKagiNoxtua

Data Residency

Where is your data stored and processed?

Kagi: All data is processed on US infrastructure with no EU data residency option currently available.

Noxtua: Processing occurs exclusively on European infrastructure (Open Telekom Cloud by Deutsche Telekom and IONOS) with no connection to US cloud providers, plus an on-premise deployment option. Best-in-class EU data residency.

1/5

All data is processed on US infrastructure with no EU data residency option currently available.

5/5

Processing occurs exclusively on European infrastructure (Open Telekom Cloud by Deutsche Telekom and IONOS) with no connection to US cloud providers, plus an on-premise deployment option. Best-in-class EU data residency.

Legal Jurisdiction

Which laws govern the company and your data?

Kagi: US-incorporated and subject to CLOUD Act; strong privacy-by-design model but US legal jurisdiction is a residual risk.

Noxtua: Incorporated in Germany as Noxtua SE (formerly Xayn AG), an EU/EEA entity with no US parent. Designed to meet German professional-secrecy law (§ 43e BRAO, § 203 StGB).

2/5

US-incorporated and subject to CLOUD Act; strong privacy-by-design model but US legal jurisdiction is a residual risk.

5/5

Incorporated in Germany as Noxtua SE (formerly Xayn AG), an EU/EEA entity with no US parent. Designed to meet German professional-secrecy law (§ 43e BRAO, § 203 StGB).

Data Retention & Training

Is your data used for model training?

Kagi: No training on user search data, no persistent user profiling, and no ad-based tracking by design.

Noxtua: Explicitly states customer data is never used to train, retrain or improve AI models, with sovereign/on-premise deployment and enterprise DPA-level controls. Specific configurable retention windows are not publicly detailed but the no-training and isolation posture is strong.

5/5

No training on user search data, no persistent user profiling, and no ad-based tracking by design.

5/5

Explicitly states customer data is never used to train, retrain or improve AI models, with sovereign/on-premise deployment and enterprise DPA-level controls. Specific configurable retention windows are not publicly detailed but the no-training and isolation posture is strong.

Certifications

ISO 27001, SOC 2, Cyber Essentials, etc.

Kagi: No SOC 2, ISO 27001, or other formal third-party security certifications are currently published.

Noxtua: Extensive published certification stack: ISO 42001 (first German company), ISO 27001, 27017, 27018, 9001, plus BSI C5 and TISAX. No SOC 2 (US-oriented), but European sector and AI-specific certifications exceed the baseline.

1/5

No SOC 2, ISO 27001, or other formal third-party security certifications are currently published.

5/5

Extensive published certification stack: ISO 42001 (first German company), ISO 27001, 27017, 27018, 9001, plus BSI C5 and TISAX. No SOC 2 (US-oriented), but European sector and AI-specific certifications exceed the baseline.

Regulatory Fit

Suitability for regulated industries and professional services

Kagi: Privacy-first business model is commendable, but lack of certifications and US jurisdiction limit regulated institutional use in Europe.

Noxtua: Purpose-built for regulated EU legal work, explicitly meeting attorney confidentiality and professional-secrecy requirements, with backing from major law firms and legal publishers. Suitable for the most demanding EU regulated legal and public-sector use.

2/5

Privacy-first business model is commendable, but lack of certifications and US jurisdiction limit regulated institutional use in Europe.

5/5

Purpose-built for regulated EU legal work, explicitly meeting attorney confidentiality and professional-secrecy requirements, with backing from major law firms and legal publishers. Suitable for the most demanding EU regulated legal and public-sector use.

Total Score

11/25

25/25

Best For

Kagi

Best for privacy-conscious teams who need strong data retention controls.

Noxtua

Best for EU-headquartered organisations needing maximum data sovereignty; organisations requiring broad certification coverage (ISO 42001, ISO 27001, ISO 27017); regulated industries (BfDI, BaFin); privacy-conscious teams who need strong data retention controls; organisations that need self-hosted or on-premise deployment; enterprises requiring SSO integration.

Detailed Comparison

Kagi vs Noxtua: Trust & Compliance Comparison

Kagi (Kagi, US) scores 11/25 overall with a Review Required (Caution) trust badge. Privacy-first AI search engine with no ads and no tracking. Noxtua (Noxtua, DE) scores 25/25 with a Gold (Excellent) trust badge. Europe's sovereign legal AI with its own European-trained legal LLM.

Dimension-by-Dimension Breakdown

#### Data Residency

Noxtua leads with 5/5 vs 1/5.

●Kagi (1/5): All data is processed on US infrastructure with no EU data residency option currently available.

●Noxtua (5/5): Processing occurs exclusively on European infrastructure (Open Telekom Cloud by Deutsche Telekom and IONOS) with no connection to US cloud providers, plus an on-premise deployment option. Best-in-class EU data residency.

#### Legal Jurisdiction

Noxtua leads with 5/5 vs 2/5.

●Kagi (2/5): US-incorporated and subject to CLOUD Act; strong privacy-by-design model but US legal jurisdiction is a residual risk.

●Noxtua (5/5): Incorporated in Germany as Noxtua SE (formerly Xayn AG), an EU/EEA entity with no US parent. Designed to meet German professional-secrecy law (§ 43e BRAO, § 203 StGB).

#### Data Retention & Training

Both score equally at 5/5.

●Kagi (5/5): No training on user search data, no persistent user profiling, and no ad-based tracking by design.

●Noxtua (5/5): Explicitly states customer data is never used to train, retrain or improve AI models, with sovereign/on-premise deployment and enterprise DPA-level controls. Specific configurable retention windows are not publicly detailed but the no-training and isolation posture is strong.

#### Certifications

Noxtua leads with 5/5 vs 1/5.

●Kagi (1/5): No SOC 2, ISO 27001, or other formal third-party security certifications are currently published.

●Noxtua (5/5): Extensive published certification stack: ISO 42001 (first German company), ISO 27001, 27017, 27018, 9001, plus BSI C5 and TISAX. No SOC 2 (US-oriented), but European sector and AI-specific certifications exceed the baseline.

#### Regulatory Fit

Noxtua leads with 5/5 vs 2/5.

●Kagi (2/5): Privacy-first business model is commendable, but lack of certifications and US jurisdiction limit regulated institutional use in Europe.

●Noxtua (5/5): Purpose-built for regulated EU legal work, explicitly meeting attorney confidentiality and professional-secrecy requirements, with backing from major law firms and legal publishers. Suitable for the most demanding EU regulated legal and public-sector use.

Certifications at a Glance

Certification	Kagi	Noxtua
BSI C5	No	Yes
ISO 27001	No	Yes
ISO 27017	No	Yes
ISO 27018	No	Yes
ISO 42001	No	Yes
ISO 9001	No	Yes
TISAX	No	Yes

Overall Verdict

Noxtua has a clear trust advantage, scoring 25/25 compared to Kagi's 11/25. Noxtua particularly excels in data residency, legal jurisdiction, certifications, regulatory fit.

Frequently Asked Questions

Which is better for EU compliance, Kagi or Noxtua?

Kagi has a TrustKit score of 11/25 while Noxtua scores 25/25. Noxtua currently rates higher across data residency, legal jurisdiction, data retention, certifications, and regulatory fit.

How do Kagi and Noxtua compare on data residency?

Kagi scores 1/5 for data residency (All data is processed on US infrastructure with no EU data residency option currently available.), while Noxtua scores 5/5 (Processing occurs exclusively on European infrastructure (Open Telekom Cloud by Deutsche Telekom and IONOS) with no connection to US cloud providers, plus an on-premise deployment option. Best-in-class EU data residency.).

Are Kagi and Noxtua GDPR compliant?

Both tools are assessed across five compliance dimensions. Kagi has a regulatory fit score of 2/5 and Noxtua scores 5/5. Check the full comparison above for a detailed breakdown.

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