deepset (Haystack)

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

Nebius AI

European GPU cloud and LLM inference platform built for AI-native businesses

deepset (Haystack)

Excellent

24/25

Nebius AI

Strong

20/25

Score Breakdown

Dimensiondeepset (Haystack)Nebius AI

Data Residency

Where is your data stored and processed?

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.

Nebius AI: Data centres located in Finland and the Netherlands—both EU member states. Inference and compute workloads remain within EU borders. Strong data residency story for European AI builders.

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.

5/5

Data centres located in Finland and the Netherlands—both EU member states. Inference and compute workloads remain within EU borders. Strong data residency story for European AI builders.

Legal Jurisdiction

Which laws govern the company and your data?

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.

Nebius AI: Incorporated as Nebius Group N.V. under Dutch law. EU legal jurisdiction applies, with no CLOUD Act exposure. Corporate history as Yandex spin-off warrants due diligence on ownership structure, but current governance is EU-based.

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.

4/5

Incorporated as Nebius Group N.V. under Dutch law. EU legal jurisdiction applies, with no CLOUD Act exposure. Corporate history as Yandex spin-off warrants due diligence on ownership structure, but current governance is EU-based.

Data Retention & Training

Is your data used for model training?

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.

Nebius AI: Customer inference requests and training data are not used to train shared models. Tenant isolation architecture. GDPR-compliant data processing posture with configurable retention for enterprise customers.

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.

4/5

Customer inference requests and training data are not used to train shared models. Tenant isolation architecture. GDPR-compliant data processing posture with configurable retention for enterprise customers.

Certifications

ISO 27001, SOC 2, Cyber Essentials, etc.

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

Nebius AI: ISO 27001 certification in place. As a relatively new independent entity, the broader certification portfolio (SOC 2 Type II, ISO 27701) is still developing. Expect maturation over 2025-2026.

5/5

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

3/5

ISO 27001 certification in place. As a relatively new independent entity, the broader certification portfolio (SOC 2 Type II, ISO 27701) is still developing. Expect maturation over 2025-2026.

Regulatory Fit

Suitability for regulated industries and professional services

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.

Nebius AI: Excellent fit for European organisations building AI applications and needing EU-sovereign inference infrastructure. Dutch incorporation, EU data centres, and GDPR-compliant DPA make this suitable for most regulated EU use cases. Financial services and healthcare organisations should review specifics with Nebius.

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.

4/5

Excellent fit for European organisations building AI applications and needing EU-sovereign inference infrastructure. Dutch incorporation, EU data centres, and GDPR-compliant DPA make this suitable for most regulated EU use cases. Financial services and healthcare organisations should review specifics with Nebius.

Total Score

24/25

20/25

Best For

deepset (Haystack)

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.

Nebius AI

Best for EU-headquartered organisations needing maximum data sovereignty; regulated industries (CNIL, BaFin); privacy-conscious teams who need strong data retention controls.

Detailed Comparison

deepset (Haystack) vs Nebius AI: 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. Nebius AI (Nebius, NL) scores 20/25 with a Silver (Strong) trust badge. European GPU cloud and LLM inference platform built for AI-native businesses.

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.

●Nebius AI (5/5): Data centres located in Finland and the Netherlands—both EU member states. Inference and compute workloads remain within EU borders. Strong data residency story for European AI builders.

#### Legal Jurisdiction

deepset (Haystack) leads with 5/5 vs 4/5.

●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.

●Nebius AI (4/5): Incorporated as Nebius Group N.V. under Dutch law. EU legal jurisdiction applies, with no CLOUD Act exposure. Corporate history as Yandex spin-off warrants due diligence on ownership structure, but current governance is EU-based.

#### Data Retention & Training

Both score equally at 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.

●Nebius AI (4/5): Customer inference requests and training data are not used to train shared models. Tenant isolation architecture. GDPR-compliant data processing posture with configurable retention for enterprise customers.

#### Certifications

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

●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).

●Nebius AI (3/5): ISO 27001 certification in place. As a relatively new independent entity, the broader certification portfolio (SOC 2 Type II, ISO 27701) is still developing. Expect maturation over 2025-2026.

#### Regulatory Fit

deepset (Haystack) leads with 5/5 vs 4/5.

●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.

●Nebius AI (4/5): Excellent fit for European organisations building AI applications and needing EU-sovereign inference infrastructure. Dutch incorporation, EU data centres, and GDPR-compliant DPA make this suitable for most regulated EU use cases. Financial services and healthcare organisations should review specifics with Nebius.

Certifications at a Glance

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

Overall Verdict

deepset (Haystack) has a clear trust advantage, scoring 24/25 compared to Nebius AI's 20/25. deepset (Haystack) particularly excels in legal jurisdiction, certifications, regulatory fit.

Frequently Asked Questions

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

deepset (Haystack) has a TrustKit score of 24/25 while Nebius AI scores 20/25. deepset (Haystack) currently rates higher across data residency, legal jurisdiction, data retention, certifications, and regulatory fit.

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

deepset (Haystack) scores 5/5 for data residency (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.), while Nebius AI scores 5/5 (Data centres located in Finland and the Netherlands—both EU member states. Inference and compute workloads remain within EU borders. Strong data residency story for European AI builders.).

Are deepset (Haystack) and Nebius AI GDPR compliant?

Both tools are assessed across five compliance dimensions. deepset (Haystack) has a regulatory fit score of 5/5 and Nebius AI scores 4/5. Check the full comparison above for a detailed breakdown.

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