deepset (Haystack)

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

LangSmith (LangChain)

LLM observability, testing, and deployment platform for production AI applications

deepset (Haystack)

Excellent

24/25

LangSmith (LangChain)

Moderate

13/25

Score Breakdown

Dimensiondeepset (Haystack)LangSmith (LangChain)

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.

LangSmith (LangChain): Cloud product processes trace data (including prompts and LLM outputs) in US infrastructure. Self-hosted LangSmith Enterprise enables EU data residency. Open-source LangChain framework can run fully on-premise.

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.

2/5

Cloud product processes trace data (including prompts and LLM outputs) in US infrastructure. Self-hosted LangSmith Enterprise enables EU data residency. Open-source LangChain framework can run fully on-premise.

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.

LangSmith (LangChain): California incorporation, US jurisdiction, CLOUD Act applies. SOC 2 Type II and GDPR DPA available. Self-hosted enterprise removes US cloud dependency for EU deployments.

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.

2/5

California incorporation, US jurisdiction, CLOUD Act applies. SOC 2 Type II and GDPR DPA available. Self-hosted enterprise removes US cloud dependency for EU deployments.

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.

LangSmith (LangChain): Trace data not used for LLM training. Configurable trace retention periods. Enterprise self-hosted gives full control over data lifecycle. Cloud product has clear data isolation per project.

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

Trace data not used for LLM training. Configurable trace retention periods. Enterprise self-hosted gives full control over data lifecycle. Cloud product has clear data isolation per project.

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).

LangSmith (LangChain): SOC 2 Type II certification. Appropriate for a developer tooling company. ISO 27001 would strengthen the posture for enterprise regulated-industry procurement.

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

SOC 2 Type II certification. Appropriate for a developer tooling company. ISO 27001 would strengthen the posture for enterprise regulated-industry procurement.

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.

LangSmith (LangChain): Cloud product requires GDPR transfer mechanisms for EU personal data in traces. Self-hosted LangSmith Enterprise is the appropriate deployment for EU regulated industries. Open-source framework usage is unrestricted.

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.

2/5

Cloud product requires GDPR transfer mechanisms for EU personal data in traces. Self-hosted LangSmith Enterprise is the appropriate deployment for EU regulated industries. Open-source framework usage is unrestricted.

Total Score

24/25

13/25

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.

LangSmith (LangChain)

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 LangSmith (LangChain): 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. LangSmith (LangChain) (LangChain, US) scores 13/25 with a Bronze (Moderate) trust badge. LLM observability, testing, and deployment platform for production AI applications.

Dimension-by-Dimension Breakdown

#### Data Residency

deepset (Haystack) leads with 5/5 vs 2/5.

●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.

●LangSmith (LangChain) (2/5): Cloud product processes trace data (including prompts and LLM outputs) in US infrastructure. Self-hosted LangSmith Enterprise enables EU data residency. Open-source LangChain framework can run fully on-premise.

#### Legal Jurisdiction

deepset (Haystack) leads with 5/5 vs 2/5.

●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.

●LangSmith (LangChain) (2/5): California incorporation, US jurisdiction, CLOUD Act applies. SOC 2 Type II and GDPR DPA available. Self-hosted enterprise removes US cloud dependency for EU deployments.

#### 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.

●LangSmith (LangChain) (4/5): Trace data not used for LLM training. Configurable trace retention periods. Enterprise self-hosted gives full control over data lifecycle. Cloud product has clear data isolation per project.

#### 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).

●LangSmith (LangChain) (3/5): SOC 2 Type II certification. Appropriate for a developer tooling company. ISO 27001 would strengthen the posture for enterprise regulated-industry procurement.

#### Regulatory Fit

deepset (Haystack) leads with 5/5 vs 2/5.

●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.

●LangSmith (LangChain) (2/5): Cloud product requires GDPR transfer mechanisms for EU personal data in traces. Self-hosted LangSmith Enterprise is the appropriate deployment for EU regulated industries. Open-source framework usage is unrestricted.

Certifications at a Glance

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

Overall Verdict

deepset (Haystack) has a clear trust advantage, scoring 24/25 compared to LangSmith (LangChain)'s 13/25. deepset (Haystack) particularly excels in data residency, legal jurisdiction, certifications, regulatory fit.

Frequently Asked Questions

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

deepset (Haystack) has a TrustKit score of 24/25 while LangSmith (LangChain) scores 13/25. deepset (Haystack) currently rates higher across data residency, legal jurisdiction, data retention, certifications, and regulatory fit.

How do deepset (Haystack) and LangSmith (LangChain) 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 LangSmith (LangChain) scores 2/5 (Cloud product processes trace data (including prompts and LLM outputs) in US infrastructure. Self-hosted LangSmith Enterprise enables EU data residency. Open-source LangChain framework can run fully on-premise.).

Are deepset (Haystack) and LangSmith (LangChain) GDPR compliant?

Both tools are assessed across five compliance dimensions. deepset (Haystack) has a regulatory fit score of 5/5 and LangSmith (LangChain) scores 2/5. Check the full comparison above for a detailed breakdown.

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deepset (Haystack)

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LangSmith (LangChain)

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52%