SOC 2 (Service Organization Control 2) is an independent audit framework that evaluates a service provider's security, availability, processing integrity, confidentiality, and privacy controls — commonly cited by legal AI vendors as evidence of their data security practices.
Last reviewed: 2026/05/19
An audit log is a chronological, tamper-evident record of system activities — including user logins, document accesses, queries, and configuration changes — that enables security monitoring, compliance verification, and investigation of incidents in legal AI environments.
SecurityIn the legal AI context, confidentiality refers to the obligation of lawyers and legal AI vendors to protect client information from unauthorized disclosure, and to the technical and contractual measures that implement that protection when client data is processed by AI systems.
SecurityWhere a legal AI vendor physically stores and processes client data — a compliance requirement under GDPR, data sovereignty laws, and attorney confidentiality obligations.
SecurityEncryption at rest refers to the protection of stored data through cryptographic encoding, so that files, databases, and backups on storage media are unreadable without the appropriate decryption key — a baseline security control required for legal AI tools handling confidential client information.
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Last reviewed: 2026/05/19. Definitions are written by the LawyerAI Editorial team. Commercial relationships are disclosed and do not determine editorial scores or conclusions. See our Sponsorship & Affiliate Disclosure.
SOC 2 (Service Organization Control 2) is an independent audit framework that evaluates a service provider's security, availability, processing integrity, confidentiality, and privacy controls — commonly cited by legal AI vendors as evidence of their data security practices.
SOC 2 certification is one of the most important third-party security credentials to look for when evaluating legal AI vendors. It represents an independent audit — conducted by a licensed CPA firm — of whether the vendor's security controls are appropriately designed and operating effectively. Unlike vendor self-assessments, SOC 2 reports involve external verification.
For lawyers and law firms evaluating AI tools under their confidentiality obligations, a vendor's SOC 2 Type II report (which tests control effectiveness over a period, typically 6-12 months) provides concrete evidence of security control maturity beyond marketing claims.
There are two SOC 2 report types: Type I evaluates whether controls are suitably designed at a point in time; Type II evaluates whether those controls operated effectively over a period. Type II provides stronger assurance and is the standard that enterprise buyers should require.
SOC 2 does not cover every security risk relevant to legal AI use. It does not certify that a vendor's AI model is accurate, that the vendor does not train on client data, or that the vendor's data handling practices are consistent with professional responsibility requirements. It addresses the technical security of the vendor's infrastructure, which is an important but not the only relevant dimension.
SOC 2 compliance has become a baseline expectation for enterprise legal AI vendors targeting law firms and in-house legal departments. Vendors like Clio, Everlaw, Relativity, and Harvey AI hold SOC 2 Type II certifications and make their SOC 2 reports available to prospective enterprise customers on request.
Smaller and newer AI startups may be in the process of achieving SOC 2 certification — it takes time and resources to build the required controls and complete the audit cycle. Lawyers evaluating newer tools should ask about the vendor's security compliance roadmap and what compensating controls are in place in the interim.
A SOC 2 report should be treated as one input in a broader vendor security assessment, alongside review of the vendor's data processing agreement, penetration testing practices, access control policies, and incident response procedures.
The security team at a law firm or legal department can assist in reviewing SOC 2 reports and vendor security documentation. Attorneys making AI procurement decisions should engage their firm's security professionals in the evaluation process for any tool that will process client-confidential data.