Flowise

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

deepset (Haystack)

German AI company behind Haystack — the open-source framework for building production RAG and agent applications

Flowise

Strong

17/25

deepset (Haystack)

Excellent

24/25

Score Breakdown

DimensionFlowisedeepset (Haystack)

Data Residency

Where is your data stored and processed?

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).

deepset (Haystack): EU hosting available for managed platform. On-premises and air-gapped deployments fully supported. Open-source framework runs entirely locally with zero external data flow.

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).

5/5

EU hosting available for managed platform. On-premises and air-gapped deployments fully supported. Open-source framework runs entirely locally with zero external data flow.

Legal Jurisdiction

Which laws govern the company and your data?

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.

deepset (Haystack): German GmbH, fully under EU law. Berlin headquarters. No US parent company. Investors include EU and US VCs but corporate governance remains German.

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.

5/5

German GmbH, fully under EU law. Berlin headquarters. No US parent company. Investors include EU and US VCs but corporate governance remains German.

Data Retention & Training

Is your data used for model training?

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

deepset (Haystack): Terms restrict data use to anonymised system data only. No explicit public 'we don't train' statement, but contractual restrictions are clear. Self-hosted gives full 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.

4/5

Terms restrict data use to anonymised system data only. No explicit public 'we don't train' statement, but contractual restrictions are clear. Self-hosted gives full control.

Certifications

ISO 27001, SOC 2, Cyber Essentials, etc.

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.

deepset (Haystack): SOC 2 Type II, ISO 27001, HIPAA, and CSA STAR Level 1. Comprehensive certification suite for enterprise procurement. Third-party DPO (secjur).

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.

5/5

SOC 2 Type II, ISO 27001, HIPAA, and CSA STAR Level 1. Comprehensive certification suite for enterprise procurement. Third-party DPO (secjur).

Regulatory Fit

Suitability for regulated industries and professional services

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.

deepset (Haystack): German GmbH with EU hosting, self-hosting option, and strong certifications. One of the best-positioned AI developer tools for EU regulated industries including financial services and healthcare.

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.

5/5

German GmbH with EU hosting, self-hosting option, and strong certifications. One of the best-positioned AI developer tools for EU regulated industries including financial services and healthcare.

Total Score

17/25

24/25

Best For

Flowise

Best for EU-headquartered organisations needing maximum data sovereignty; organisations requiring broad certification coverage (SOC 2 Type II, ISO 27001, CSA STAR Level 1); 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.

deepset (Haystack)

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

deepset (Haystack) vs Flowise: Trust & Compliance Comparison

deepset (Haystack) (deepset, DE) scores 24/25 overall with a Gold (Excellent) trust badge. German AI company behind Haystack — the open-source framework for building production RAG and agent applications. Flowise (FlowiseAI, US) scores 17/25 with a Silver (Strong) trust badge. Open-source low-code tool for building LLM applications and AI agents visually.

Dimension-by-Dimension Breakdown

#### Data Residency

Both score equally at 5/5.

●deepset (Haystack) (5/5): EU hosting available for managed platform. On-premises and air-gapped deployments fully supported. Open-source framework runs entirely locally with zero external data flow.

●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).

#### Legal Jurisdiction

deepset (Haystack) leads with 5/5 vs 3/5.

●deepset (Haystack) (5/5): German GmbH, fully under EU law. Berlin headquarters. No US parent company. Investors include EU and US VCs but corporate governance remains German.

●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.

#### Data Retention & Training

Flowise leads with 5/5 vs 4/5.

●deepset (Haystack) (4/5): Terms restrict data use to anonymised system data only. No explicit public 'we don't train' statement, but contractual restrictions are clear. Self-hosted gives full control.

●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.

#### Certifications

deepset (Haystack) leads with 5/5 vs 1/5.

●deepset (Haystack) (5/5): SOC 2 Type II, ISO 27001, HIPAA, and CSA STAR Level 1. Comprehensive certification suite for enterprise procurement. Third-party DPO (secjur).

●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.

#### Regulatory Fit

deepset (Haystack) leads with 5/5 vs 3/5.

●deepset (Haystack) (5/5): German GmbH with EU hosting, self-hosting option, and strong certifications. One of the best-positioned AI developer tools for EU regulated industries including financial services and healthcare.

●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.

Certifications at a Glance

Certification	deepset (Haystack)	Flowise
CSA STAR Level 1	Yes	No
ISO 27001	Yes	No
SOC 2 Type II	Yes	No

Overall Verdict

deepset (Haystack) has a clear trust advantage, scoring 24/25 compared to Flowise's 17/25. deepset (Haystack) particularly excels in legal jurisdiction, certifications, regulatory fit.

Frequently Asked Questions

Which is better for EU compliance, Flowise or deepset (Haystack)?

Flowise has a TrustKit score of 17/25 while deepset (Haystack) scores 24/25. deepset (Haystack) currently rates higher across data residency, legal jurisdiction, data retention, certifications, and regulatory fit.

How do Flowise and deepset (Haystack) compare on data residency?

Flowise scores 5/5 for data residency (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).), while deepset (Haystack) scores 5/5 (EU hosting available for managed platform. On-premises and air-gapped deployments fully supported. Open-source framework runs entirely locally with zero external data flow.).

Are Flowise and deepset (Haystack) GDPR compliant?

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

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