Langfuse

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

Poolside

Enterprise AI coding platform with on-premise and VPC deployment for secure software development

Langfuse

Excellent

22/25

Poolside

Strong

17/25

Score Breakdown

DimensionLangfusePoolside

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.

Poolside: On-premise and VPC deployment with zero data egress. Customer code never leaves the customer's environment. EU organisations can deploy on their own EU infrastructure. Maximum data sovereignty.

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

On-premise and VPC deployment with zero data egress. Customer code never leaves the customer's environment. EU organisations can deploy on their own EU infrastructure. Maximum data sovereignty.

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.

Poolside: Delaware incorporation (US). French SAS entity exists but parent is US. CLOUD Act applies to the corporate entity, though on-premise deployment means code never reaches Poolside's infrastructure.

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). French SAS entity exists but parent is US. CLOUD Act applies to the corporate entity, though on-premise deployment means code never reaches Poolside's infrastructure.

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.

Poolside: On-premise/VPC mode: customer has full control, no data leaves their environment. Training uses synthetic data (RLCEF), not customer-contributed code. Structural separation.

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.

5/5

On-premise/VPC mode: customer has full control, no data leaves their environment. Training uses synthetic data (RLCEF), not customer-contributed code. Structural separation.

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.

Poolside: Drata trust centre exists, suggesting SOC 2 is in progress. No public confirmation of SOC 2 or ISO 27001. US government ATO achieved (military/public sector).

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.

2/5

Drata trust centre exists, suggesting SOC 2 is in progress. No public confirmation of SOC 2 or ISO 27001. US government ATO achieved (military/public sector).

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.

Poolside: On-premise deployment model is excellent for regulated industries. US jurisdiction is the main concern. French entity provides some EU connection. Public sector certifications (ATO, IL5) demonstrate security maturity.

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

On-premise deployment model is excellent for regulated industries. US jurisdiction is the main concern. French entity provides some EU connection. Public sector certifications (ATO, IL5) demonstrate security maturity.

Total Score

22/25

17/25

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.

Poolside

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

Detailed Comparison

Langfuse vs Poolside: 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. Poolside (Poolside, US) scores 17/25 with a Silver (Strong) trust badge. Enterprise AI coding platform with on-premise and VPC deployment for secure software development.

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.

●Poolside (5/5): On-premise and VPC deployment with zero data egress. Customer code never leaves the customer's environment. EU organisations can deploy on their own EU infrastructure. Maximum data sovereignty.

#### 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.

●Poolside (2/5): Delaware incorporation (US). French SAS entity exists but parent is US. CLOUD Act applies to the corporate entity, though on-premise deployment means code never reaches Poolside's infrastructure.

#### Data Retention & Training

Both score equally at 5/5.

●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.

●Poolside (5/5): On-premise/VPC mode: customer has full control, no data leaves their environment. Training uses synthetic data (RLCEF), not customer-contributed code. Structural separation.

#### Certifications

Langfuse leads with 5/5 vs 2/5.

●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.

●Poolside (2/5): Drata trust centre exists, suggesting SOC 2 is in progress. No public confirmation of SOC 2 or ISO 27001. US government ATO achieved (military/public sector).

#### 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.

●Poolside (3/5): On-premise deployment model is excellent for regulated industries. US jurisdiction is the main concern. French entity provides some EU connection. Public sector certifications (ATO, IL5) demonstrate security maturity.

Certifications at a Glance

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

Overall Verdict

Langfuse has a clear trust advantage, scoring 22/25 compared to Poolside's 17/25. Langfuse particularly excels in legal jurisdiction, certifications, regulatory fit.

Frequently Asked Questions

Which is better for EU compliance, Langfuse or Poolside?

Langfuse has a TrustKit score of 22/25 while Poolside scores 17/25. Langfuse currently rates higher across data residency, legal jurisdiction, data retention, certifications, and regulatory fit.

How do Langfuse and Poolside 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 Poolside scores 5/5 (On-premise and VPC deployment with zero data egress. Customer code never leaves the customer's environment. EU organisations can deploy on their own EU infrastructure. Maximum data sovereignty.).

Are Langfuse and Poolside GDPR compliant?

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

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