Relativity aiR vs Luminance: AI Document Review Compared

Relativity aiR and Eve by Luminance both use AI for document review, but they attack different segments. Relativity (valued at $3.6B, FedRAMP authorized) dominates e-discovery — massive document sets in litigation. Luminance ($100M+ raised) specializes in contract intelligence — M&A due diligence, portfolio risk analysis, and contract negotiation. Choosing between them depends on whether your documents are evidence or agreements.

Relativity aiR adds AI to the platform that already processes most of America's large-scale document reviews. Luminance built proprietary models from scratch specifically for contract understanding in 60+ languages. Both are enterprise tools with enterprise pricing. Both require significant document volume to justify the investment.

Feature Comparison

Relativity aiR focuses on litigation document review: AI-powered privilege detection, key document identification, sentiment analysis across document sets, and review summaries. It helps reviewers find what matters in millions of documents and flag what's privileged before production.

Eve by Luminance focuses on contract intelligence: AI contract review and negotiation, autonomous contract generation, risk identification across portfolios, and M&A due diligence acceleration. It understands contract language specifically — clauses, obligations, risk positions — not just document content generally.

Pricing and Cost

Relativity aiR: part of RelativityOne (cloud) with per-GB pricing for hosting plus AI features. Enterprise contracts. Pricing depends on data volume — a typical large matter might cost $10K–50K+ for AI-assisted review.

Luminance: enterprise pricing, custom per deployment. Not publicly listed. Expect annual contracts in the $50K–200K+ range depending on firm size and usage.

Both are significant investments. The ROI calculation is straightforward: how many reviewer hours does the AI save? For Relativity, if AI cuts review time by 30% on a $500K document review, that's $150K in savings. For Luminance, if AI accelerates M&A due diligence from 3 weeks to 1 week, the deal economics justify the cost.

Data Privacy and Compliance

Relativity aiR: FedRAMP authorized, SOC 2 Type II, HIPAA compliant. The highest security certification profile of any tool in this comparison. Government-grade security suitable for the most sensitive litigation.

Luminance: SOC 2 compliant with on-premise deployment options. For firms with strict data residency requirements or handling cross-border transactions, on-premise deployment means contract data never leaves your infrastructure.

Both exceed standard enterprise requirements. Relativity's FedRAMP authorization is unique in legal AI — it's the only document review platform cleared for government work.

Best For

Choose Relativity aiR if your firm handles large-scale litigation document review — privilege logs, production sets, key document identification across millions of files. If you're already on Relativity (most e-discovery teams are), aiR is a natural upgrade that reduces reviewer hours on existing workflows.

Choose Luminance if your firm handles high-volume M&A transactions, corporate contract management, or multi-language due diligence. Luminance's purpose-built contract models outperform general AI on contract-specific tasks. The 60+ language support is unmatched for cross-border work.

The Verdict

These tools don't compete — they serve different practices. A litigation firm needs Relativity aiR. A transactional firm needs Luminance. A full-service firm might need both, deployed to different practice groups.

If your firm does both litigation and transactions, prioritize based on volume. If you review more documents in discovery than you do in due diligence, start with Relativity aiR. If your M&A practice generates more document review revenue, start with Luminance. The wrong choice isn't picking one over the other — it's buying a tool that doesn't match your primary document review need.

The Bottom Line: Relativity aiR is for litigation e-discovery; Luminance is for transactional contract intelligence — they serve different practices, not competing needs.