Langfuse

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

Portkey

AI gateway and LLMOps platform for routing, observability, and guardrails across multiple LLM providers

Langfuse

Excellent

22/25

Portkey

Moderate

15/25

Score Breakdown

DimensionLangfusePortkey

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.

Portkey: US cloud by default but self-hosted deployment option allows EU data residency. Gateway architecture means LLM requests can be routed to EU-hosted providers.

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.

3/5

US cloud by default but self-hosted deployment option allows EU data residency. Gateway architecture means LLM requests can be routed to EU-hosted providers.

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.

Portkey: Delaware incorporation. US jurisdiction. Self-hosted option eliminates cloud dependency for data-sensitive deployments.

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.

2/5

Delaware incorporation. US jurisdiction. Self-hosted option eliminates cloud dependency for data-sensitive deployments.

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.

Portkey: Gateway does not train on routed data. Observability logs are retained per customer policy. Self-hosted gives full control.

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

Gateway does not train on routed data. Observability logs are retained per customer policy. Self-hosted gives full control.

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.

Portkey: SOC 2 Type II certified. Appropriate for the company's stage. ISO 27001 would strengthen enterprise procurement.

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

SOC 2 Type II certified. Appropriate for the company's stage. ISO 27001 would strengthen enterprise procurement.

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.

Portkey: Self-hosted option enables EU deployment. SOC 2 certified. US jurisdiction applies to cloud product. Suitable for European teams managing multi-model AI infrastructure.

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.

3/5

Self-hosted option enables EU deployment. SOC 2 certified. US jurisdiction applies to cloud product. Suitable for European teams managing multi-model AI infrastructure.

Total Score

22/25

15/25

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.

Portkey

Best for privacy-conscious teams who need strong data retention controls; organisations that need self-hosted or on-premise deployment; teams on a tight budget.

Detailed Comparison

Langfuse vs Portkey: 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. Portkey (Portkey, US) scores 15/25 with a Bronze (Moderate) trust badge. AI gateway and LLMOps platform for routing, observability, and guardrails across multiple LLM providers.

Dimension-by-Dimension Breakdown

#### Data Residency

Langfuse leads with 5/5 vs 3/5.

●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.

●Portkey (3/5): US cloud by default but self-hosted deployment option allows EU data residency. Gateway architecture means LLM requests can be routed to EU-hosted providers.

#### Legal Jurisdiction

Langfuse leads with 3/5 vs 2/5.

●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.

●Portkey (2/5): Delaware incorporation. US jurisdiction. Self-hosted option eliminates cloud dependency for data-sensitive deployments.

#### 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.

●Portkey (4/5): Gateway does not train on routed data. Observability logs are retained per customer policy. Self-hosted gives full control.

#### 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.

●Portkey (3/5): SOC 2 Type II certified. Appropriate for the company's stage. ISO 27001 would strengthen enterprise procurement.

#### Regulatory Fit

Langfuse leads with 4/5 vs 3/5.

●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.

●Portkey (3/5): Self-hosted option enables EU deployment. SOC 2 certified. US jurisdiction applies to cloud product. Suitable for European teams managing multi-model AI infrastructure.

Certifications at a Glance

Certification	Langfuse	Portkey
ISO 27001	Yes	No
SOC 2 Type II	Yes	Yes

Overall Verdict

Langfuse has a clear trust advantage, scoring 22/25 compared to Portkey's 15/25. Langfuse particularly excels in data residency, legal jurisdiction, data retention & training, certifications, regulatory fit.

Frequently Asked Questions

Which is better for EU compliance, Langfuse or Portkey?

Langfuse has a TrustKit score of 22/25 while Portkey scores 15/25. Langfuse currently rates higher across data residency, legal jurisdiction, data retention, certifications, and regulatory fit.

How do Langfuse and Portkey 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 Portkey scores 3/5 (US cloud by default but self-hosted deployment option allows EU data residency. Gateway architecture means LLM requests can be routed to EU-hosted providers.).

Are Langfuse and Portkey GDPR compliant?

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

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