Langfuse

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

Flowise

Open-source low-code tool for building LLM applications and AI agents visually

Langfuse

Excellent

22/25

Flowise

Strong

17/25

Score Breakdown

DimensionLangfuseFlowise

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.

Flowise: Self-hosted deployment provides maximum data sovereignty—data stays entirely within your own infrastructure. Score reflects self-hosted path. Cloud product is US-hosted (score 1).

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

Self-hosted deployment provides maximum data sovereignty—data stays entirely within your own infrastructure. Score reflects self-hosted path. Cloud product is US-hosted (score 1).

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.

Flowise: US-incorporated company but open-source Apache 2.0 licence means self-hosted instances are independent of vendor jurisdiction. For self-hosted EU deployments, your infrastructure jurisdiction governs. Cloud product falls under US jurisdiction.

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.

3/5

US-incorporated company but open-source Apache 2.0 licence means self-hosted instances are independent of vendor jurisdiction. For self-hosted EU deployments, your infrastructure jurisdiction governs. Cloud product falls under US jurisdiction.

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.

Flowise: Self-hosted: full control over all data lifecycle. No data leaves your infrastructure. Conversation history, documents, and embeddings are entirely under your management.

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

Self-hosted: full control over all data lifecycle. No data leaves your infrastructure. Conversation history, documents, and embeddings are entirely under your management.

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.

Flowise: Early-stage company with no published independent security certifications. Open-source self-hosted path means your own security controls apply. Cloud product has no published certifications.

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

Early-stage company with no published independent security certifications. Open-source self-hosted path means your own security controls apply. Cloud product has no published certifications.

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.

Flowise: Self-hosted on EU infrastructure with EU-sovereign LLM providers achieves excellent regulatory fit for EU organisations. Cloud product not recommended for regulated EU industries. Good choice for technical teams building sovereignty-first AI applications.

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 on EU infrastructure with EU-sovereign LLM providers achieves excellent regulatory fit for EU organisations. Cloud product not recommended for regulated EU industries. Good choice for technical teams building sovereignty-first AI applications.

Total Score

22/25

17/25

Best For

Langfuse

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.

Flowise

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.

Detailed Comparison

Flowise vs Langfuse: Trust & Compliance Comparison

Flowise (FlowiseAI, US) scores 17/25 overall with a Silver (Strong) trust badge. Open-source low-code tool for building LLM applications and AI agents visually. Langfuse (Langfuse (ClickHouse), DE) scores 22/25 with a Gold (Excellent) trust badge. Open-source LLM observability and engineering platform for tracing, evaluation, and prompt management.

Dimension-by-Dimension Breakdown

#### Data Residency

Both score equally at 5/5.

●Flowise (5/5): Self-hosted deployment provides maximum data sovereignty—data stays entirely within your own infrastructure. Score reflects self-hosted path. Cloud product is US-hosted (score 1).

●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.

#### Legal Jurisdiction

Both score equally at 3/5.

●Flowise (3/5): US-incorporated company but open-source Apache 2.0 licence means self-hosted instances are independent of vendor jurisdiction. For self-hosted EU deployments, your infrastructure jurisdiction governs. Cloud product falls under US jurisdiction.

●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.

#### Data Retention & Training

Both score equally at 5/5.

●Flowise (5/5): Self-hosted: full control over all data lifecycle. No data leaves your infrastructure. Conversation history, documents, and embeddings are entirely under your management.

●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.

#### Certifications

Langfuse leads with 5/5 vs 1/5.

●Flowise (1/5): Early-stage company with no published independent security certifications. Open-source self-hosted path means your own security controls apply. Cloud product has no published certifications.

●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.

#### Regulatory Fit

Langfuse leads with 4/5 vs 3/5.

●Flowise (3/5): Self-hosted on EU infrastructure with EU-sovereign LLM providers achieves excellent regulatory fit for EU organisations. Cloud product not recommended for regulated EU industries. Good choice for technical teams building sovereignty-first AI applications.

●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.

Certifications at a Glance

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

Overall Verdict

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

Frequently Asked Questions

Which is better for EU compliance, Langfuse or Flowise?

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

How do Langfuse and Flowise 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 Flowise scores 5/5 (Self-hosted deployment provides maximum data sovereignty—data stays entirely within your own infrastructure. Score reflects self-hosted path. Cloud product is US-hosted (score 1).).

Are Langfuse and Flowise GDPR compliant?

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

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