LightOn

Sovereign enterprise GenAI platform deployed on-prem, air-gapped, or EU cloud

LangSmith (LangChain)

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

LightOn

Excellent

22/25

LangSmith (LangChain)

Moderate

13/25

Score Breakdown

DimensionLightOnLangSmith (LangChain)

Data Residency

Where is your data stored and processed?

LightOn: Deploys on-premise, in customer VPC, or air-gapped on EU infrastructure, so data never leaves the customer's own security perimeter. Strongest possible residency posture.

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

Deploys on-premise, in customer VPC, or air-gapped on EU infrastructure, so data never leaves the customer's own security perimeter. Strongest possible residency posture.

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?

LightOn: French SA incorporated in France, listed on Euronext Growth Paris, with no US parent. Fully under EU/French jurisdiction.

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

French SA incorporated in France, listed on Euronext Growth Paris, with no US parent. Fully under EU/French jurisdiction.

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?

LightOn: In-perimeter deployment means no customer data is sent out or used to train shared models, and retention is governed by the customer's own infrastructure. Scored 4 rather than 5 as public DPA/retention-control documentation is limited.

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

In-perimeter deployment means no customer data is sent out or used to train shared models, and retention is governed by the customer's own infrastructure. Scored 4 rather than 5 as public DPA/retention-control documentation is limited.

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.

LightOn: Holds SOC 2 Type 1. ISO 27001 and SOC 2 Type II are not confirmed in published sources, and ANSSI SecNumCloud appears to be a positioning goal rather than a confirmed qualification.

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

3/5

Holds SOC 2 Type 1. ISO 27001 and SOC 2 Type II are not confirmed in published sources, and ANSSI SecNumCloud appears to be a positioning goal rather than a confirmed qualification.

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

LightOn: Purpose-built for regulated and sovereign EU buyers, with public-sector and defense/aerospace references (CNES, Safran, French tax authority) and GDPR/AI Act alignment.

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

Purpose-built for regulated and sovereign EU buyers, with public-sector and defense/aerospace references (CNES, Safran, French tax authority) and GDPR/AI Act alignment.

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

22/25

13/25

Best For

LightOn

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.

LangSmith (LangChain)

Best for EU-headquartered organisations needing maximum data sovereignty; regulated industries (CNIL, AMF); privacy-conscious teams who need strong data retention controls; organisations that need self-hosted or on-premise deployment.

Detailed Comparison

LangSmith (LangChain) vs LightOn: Trust & Compliance Comparison

LangSmith (LangChain) (LangChain, US) scores 13/25 overall with a Bronze (Moderate) trust badge. LLM observability, testing, and deployment platform for production AI applications. LightOn (LightOn, FR) scores 22/25 with a Gold (Excellent) trust badge. Sovereign enterprise GenAI platform deployed on-prem, air-gapped, or EU cloud.

Dimension-by-Dimension Breakdown

#### Data Residency

LightOn leads with 5/5 vs 2/5.

●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.

●LightOn (5/5): Deploys on-premise, in customer VPC, or air-gapped on EU infrastructure, so data never leaves the customer's own security perimeter. Strongest possible residency posture.

#### Legal Jurisdiction

LightOn leads with 5/5 vs 2/5.

●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.

●LightOn (5/5): French SA incorporated in France, listed on Euronext Growth Paris, with no US parent. Fully under EU/French jurisdiction.

#### Data Retention & Training

Both score equally at 4/5.

●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.

●LightOn (4/5): In-perimeter deployment means no customer data is sent out or used to train shared models, and retention is governed by the customer's own infrastructure. Scored 4 rather than 5 as public DPA/retention-control documentation is limited.

#### Certifications

Both score equally at 3/5.

●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.

●LightOn (3/5): Holds SOC 2 Type 1. ISO 27001 and SOC 2 Type II are not confirmed in published sources, and ANSSI SecNumCloud appears to be a positioning goal rather than a confirmed qualification.

#### Regulatory Fit

LightOn leads with 5/5 vs 2/5.

●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.

●LightOn (5/5): Purpose-built for regulated and sovereign EU buyers, with public-sector and defense/aerospace references (CNES, Safran, French tax authority) and GDPR/AI Act alignment.

Certifications at a Glance

Certification	LangSmith (LangChain)	LightOn
SOC 2 Type 1	No	Yes
SOC 2 Type II	Yes	No

Overall Verdict

LightOn has a clear trust advantage, scoring 22/25 compared to LangSmith (LangChain)'s 13/25. LightOn particularly excels in data residency, legal jurisdiction, regulatory fit.

Frequently Asked Questions

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

LightOn has a TrustKit score of 22/25 while LangSmith (LangChain) scores 13/25. LightOn currently rates higher across data residency, legal jurisdiction, data retention, certifications, and regulatory fit.

How do LightOn and LangSmith (LangChain) compare on data residency?

LightOn scores 5/5 for data residency (Deploys on-premise, in customer VPC, or air-gapped on EU infrastructure, so data never leaves the customer's own security perimeter. Strongest possible residency posture.), 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 LightOn and LangSmith (LangChain) GDPR compliant?

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

Explore Each Tool

LightOn

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88%

LangSmith (LangChain)

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52%