Langfuse

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

Modal

Serverless GPU compute platform for AI model training, inference, and data pipelines

Langfuse

Excellent

22/25

Modal

Caution

9/25

Score Breakdown

DimensionLangfuseModal

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.

Modal: US-only infrastructure. No EU data centre options. Not suitable for GDPR personal data processing without SCCs and TIA.

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.

1/5

US-only infrastructure. No EU data centre options. Not suitable for GDPR personal data processing without SCCs and TIA.

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.

Modal: Delaware incorporation, US jurisdiction, CLOUD Act applies. Basic GDPR privacy documentation. No EU subsidiary.

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, CLOUD Act applies. Basic GDPR privacy documentation. No EU subsidiary.

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.

Modal: Customer compute workloads are isolated and not used for shared training. Workload outputs are customer-controlled. Data governance documentation is lighter than enterprise-focused providers.

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.

3/5

Customer compute workloads are isolated and not used for shared training. Workload outputs are customer-controlled. Data governance documentation is lighter than enterprise-focused providers.

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.

Modal: No published independent certifications. Developer-focused startup with self-attested security practices. Not yet suitable for regulated industry 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.

1/5

No published independent certifications. Developer-focused startup with self-attested security practices. Not yet suitable for regulated industry 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.

Modal: Suited to AI developers and startups building non-personal-data workloads. US jurisdiction and absence of certifications limit suitability for regulated EU industries. Good for R&D and prototyping contexts.

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.

2/5

Suited to AI developers and startups building non-personal-data workloads. US jurisdiction and absence of certifications limit suitability for regulated EU industries. Good for R&D and prototyping contexts.

Total Score

22/25

9/25

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; enterprises requiring SSO integration.

Modal

Best for teams on a tight budget.

Detailed Comparison

Langfuse vs Modal: 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. Modal (Modal Labs, US) scores 9/25 with a Review Required (Caution) trust badge. Serverless GPU compute platform for AI model training, inference, and data pipelines.

Dimension-by-Dimension Breakdown

#### Data Residency

Langfuse leads with 5/5 vs 1/5.

●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.

●Modal (1/5): US-only infrastructure. No EU data centre options. Not suitable for GDPR personal data processing without SCCs and TIA.

#### 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.

●Modal (2/5): Delaware incorporation, US jurisdiction, CLOUD Act applies. Basic GDPR privacy documentation. No EU subsidiary.

#### Data Retention & Training

Langfuse leads with 5/5 vs 3/5.

●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.

●Modal (3/5): Customer compute workloads are isolated and not used for shared training. Workload outputs are customer-controlled. Data governance documentation is lighter than enterprise-focused providers.

#### Certifications

Langfuse leads with 5/5 vs 1/5.

●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.

●Modal (1/5): No published independent certifications. Developer-focused startup with self-attested security practices. Not yet suitable for regulated industry enterprise procurement.

#### Regulatory Fit

Langfuse leads with 4/5 vs 2/5.

●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.

●Modal (2/5): Suited to AI developers and startups building non-personal-data workloads. US jurisdiction and absence of certifications limit suitability for regulated EU industries. Good for R&D and prototyping contexts.

Certifications at a Glance

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

Overall Verdict

Langfuse has a clear trust advantage, scoring 22/25 compared to Modal's 9/25. 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 Modal?

Langfuse has a TrustKit score of 22/25 while Modal scores 9/25. Langfuse currently rates higher across data residency, legal jurisdiction, data retention, certifications, and regulatory fit.

How do Langfuse and Modal 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 Modal scores 1/5 (US-only infrastructure. No EU data centre options. Not suitable for GDPR personal data processing without SCCs and TIA.).

Are Langfuse and Modal GDPR compliant?

Both tools are assessed across five compliance dimensions. Langfuse has a regulatory fit score of 4/5 and Modal scores 2/5. Check the full comparison above for a detailed breakdown.

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