Langfuse

Open-source LLM observability and engineering platform for tracing, evaluation, and prompt management

Nebius AI

European GPU cloud and LLM inference platform built for AI-native businesses

Langfuse

Excellent

22/25

Nebius AI

Strong

20/25

Score Breakdown

DimensionLangfuseNebius AI

Data Residency

Where is your data stored and processed?

Langfuse: EU cloud region (Ireland) keeps data within EEA. Full self-hosting option allows air-gapped EU deployments with zero cloud dependency. Customer can choose exact data location.

Nebius AI: Data centres located in Finland and the Netherlands—both EU member states. Inference and compute workloads remain within EU borders. Strong data residency story for European AI builders.

5/5

EU cloud region (Ireland) keeps data within EEA. Full self-hosting option allows air-gapped EU deployments with zero cloud dependency. Customer can choose exact data location.

5/5

Data centres located in Finland and the Netherlands—both EU member states. Inference and compute workloads remain within EU borders. Strong data residency story for European AI builders.

Legal Jurisdiction

Which laws govern the company and your data?

Langfuse: German GmbH (EU company) but acquired by ClickHouse Inc. (US). German law governs the entity but US parent introduces CLOUD Act considerations. Self-hosted deployment eliminates US cloud dependency.

Nebius AI: Incorporated as Nebius Group N.V. under Dutch law. EU legal jurisdiction applies, with no CLOUD Act exposure. Corporate history as Yandex spin-off warrants due diligence on ownership structure, but current governance is EU-based.

3/5

German GmbH (EU company) but acquired by ClickHouse Inc. (US). German law governs the entity but US parent introduces CLOUD Act considerations. Self-hosted deployment eliminates US cloud dependency.

4/5

Incorporated as Nebius Group N.V. under Dutch law. EU legal jurisdiction applies, with no CLOUD Act exposure. Corporate history as Yandex spin-off warrants due diligence on ownership structure, but current governance is EU-based.

Data Retention & Training

Is your data used for model training?

Langfuse: Explicitly does not train on customer data. Customer traces and prompts processed solely to provide the service. Self-hosted gives full data lifecycle control.

Nebius AI: Customer inference requests and training data are not used to train shared models. Tenant isolation architecture. GDPR-compliant data processing posture with configurable retention for enterprise customers.

5/5

Explicitly does not train on customer data. Customer traces and prompts processed solely to provide the service. Self-hosted gives full data lifecycle control.

4/5

Customer inference requests and training data are not used to train shared models. Tenant isolation architecture. GDPR-compliant data processing posture with configurable retention for enterprise customers.

Certifications

ISO 27001, SOC 2, Cyber Essentials, etc.

Langfuse: SOC 2 Type II and ISO 27001 certified with annual audits. HIPAA BAA available. Annual external penetration tests. Excellent certification posture for a developer tooling company.

Nebius AI: ISO 27001 certification in place. As a relatively new independent entity, the broader certification portfolio (SOC 2 Type II, ISO 27701) is still developing. Expect maturation over 2025-2026.

5/5

SOC 2 Type II and ISO 27001 certified with annual audits. HIPAA BAA available. Annual external penetration tests. Excellent certification posture for a developer tooling company.

3/5

ISO 27001 certification in place. As a relatively new independent entity, the broader certification portfolio (SOC 2 Type II, ISO 27701) is still developing. Expect maturation over 2025-2026.

Regulatory Fit

Suitability for regulated industries and professional services

Langfuse: EU data hosting, GDPR DPA, German legal origin, self-hosting for regulated industries. HIPAA compliance extends reach to healthcare. The ClickHouse acquisition is the main caveat for sovereignty purists.

Nebius AI: Excellent fit for European organisations building AI applications and needing EU-sovereign inference infrastructure. Dutch incorporation, EU data centres, and GDPR-compliant DPA make this suitable for most regulated EU use cases. Financial services and healthcare organisations should review specifics with Nebius.

4/5

EU data hosting, GDPR DPA, German legal origin, self-hosting for regulated industries. HIPAA compliance extends reach to healthcare. The ClickHouse acquisition is the main caveat for sovereignty purists.

4/5

Excellent fit for European organisations building AI applications and needing EU-sovereign inference infrastructure. Dutch incorporation, EU data centres, and GDPR-compliant DPA make this suitable for most regulated EU use cases. Financial services and healthcare organisations should review specifics with Nebius.

Total Score

22/25

20/25

Best For

Langfuse

Best for regulated industries (BaFin, CNIL); privacy-conscious teams who need strong data retention controls; organisations that need self-hosted or on-premise deployment; teams on a tight budget.

Nebius AI

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

Detailed Comparison

Langfuse vs Nebius AI: Trust & Compliance Comparison

Langfuse (Langfuse (ClickHouse), DE) scores 22/25 overall with a Gold (Excellent) trust badge. Open-source LLM observability and engineering platform for tracing, evaluation, and prompt management. Nebius AI (Nebius, NL) scores 20/25 with a Silver (Strong) trust badge. European GPU cloud and LLM inference platform built for AI-native businesses.

Dimension-by-Dimension Breakdown

#### Data Residency

Both score equally at 5/5.

●Langfuse (5/5): EU cloud region (Ireland) keeps data within EEA. Full self-hosting option allows air-gapped EU deployments with zero cloud dependency. Customer can choose exact data location.

●Nebius AI (5/5): Data centres located in Finland and the Netherlands—both EU member states. Inference and compute workloads remain within EU borders. Strong data residency story for European AI builders.

#### Legal Jurisdiction

Nebius AI leads with 4/5 vs 3/5.

●Langfuse (3/5): German GmbH (EU company) but acquired by ClickHouse Inc. (US). German law governs the entity but US parent introduces CLOUD Act considerations. Self-hosted deployment eliminates US cloud dependency.

●Nebius AI (4/5): Incorporated as Nebius Group N.V. under Dutch law. EU legal jurisdiction applies, with no CLOUD Act exposure. Corporate history as Yandex spin-off warrants due diligence on ownership structure, but current governance is EU-based.

#### Data Retention & Training

Langfuse leads with 5/5 vs 4/5.

●Langfuse (5/5): Explicitly does not train on customer data. Customer traces and prompts processed solely to provide the service. Self-hosted gives full data lifecycle control.

●Nebius AI (4/5): Customer inference requests and training data are not used to train shared models. Tenant isolation architecture. GDPR-compliant data processing posture with configurable retention for enterprise customers.

#### Certifications

Langfuse leads with 5/5 vs 3/5.

●Langfuse (5/5): SOC 2 Type II and ISO 27001 certified with annual audits. HIPAA BAA available. Annual external penetration tests. Excellent certification posture for a developer tooling company.

●Nebius AI (3/5): ISO 27001 certification in place. As a relatively new independent entity, the broader certification portfolio (SOC 2 Type II, ISO 27701) is still developing. Expect maturation over 2025-2026.

#### Regulatory Fit

Both score equally at 4/5.

●Langfuse (4/5): EU data hosting, GDPR DPA, German legal origin, self-hosting for regulated industries. HIPAA compliance extends reach to healthcare. The ClickHouse acquisition is the main caveat for sovereignty purists.

●Nebius AI (4/5): Excellent fit for European organisations building AI applications and needing EU-sovereign inference infrastructure. Dutch incorporation, EU data centres, and GDPR-compliant DPA make this suitable for most regulated EU use cases. Financial services and healthcare organisations should review specifics with Nebius.

Certifications at a Glance

Certification	Langfuse	Nebius AI
ISO 27001	Yes	Yes
SOC 2 Type II	Yes	No

Overall Verdict

Langfuse has a clear trust advantage, scoring 22/25 compared to Nebius AI's 20/25. Langfuse particularly excels in data retention & training, certifications.

Frequently Asked Questions

Which is better for EU compliance, Langfuse or Nebius AI?

Langfuse has a TrustKit score of 22/25 while Nebius AI scores 20/25. Langfuse currently rates higher across data residency, legal jurisdiction, data retention, certifications, and regulatory fit.

How do Langfuse and Nebius AI compare on data residency?

Langfuse scores 5/5 for data residency (EU cloud region (Ireland) keeps data within EEA. Full self-hosting option allows air-gapped EU deployments with zero cloud dependency. Customer can choose exact data location.), while Nebius AI scores 5/5 (Data centres located in Finland and the Netherlands—both EU member states. Inference and compute workloads remain within EU borders. Strong data residency story for European AI builders.).

Are Langfuse and Nebius AI GDPR compliant?

Both tools are assessed across five compliance dimensions. Langfuse has a regulatory fit score of 4/5 and Nebius AI scores 4/5. Check the full comparison above for a detailed breakdown.

Explore Each Tool