AI for Attorneys & Law Firms

Relativity vs DISCO: eDiscovery AI Compared

Honest comparison of Relativity (with aiR) and DISCO for AI-augmented eDiscovery at law firms.

Relativity (with the aiR layer) and DISCO are the two dominant eDiscovery platforms for law firms in 2026. Both have substantial AI capabilities. For litigation firms choosing or evaluating, the comparison matters.

The short answer

Relativity with aiR — Industry standard at AmLaw firms, deep customization, established ecosystem
DISCO — Modern cloud-native challenger gaining share at firms valuing simpler operations and modern architecture

Choice often comes down to firm preference, existing relationships, and matter type.

Feature parity

Both offer:

Predictive coding / TAR
Concept clustering
Privilege detection
Search analytics
Production preparation
Multi-matter management

Output quality is roughly comparable for most matters.

Architecture

Relativity: Available cloud-hosted and on-prem. More customizable. Deeper at large-scale enterprise.

DISCO: Cloud-native. Simpler operations. Modern architecture.

Pricing

Both per-matter pricing scaling with document volume:

Small matter: $5-20k typical
Mid-size matter: $20-80k typical
Large matter: $80-500k+ for major M&A litigation or class actions

Pricing varies significantly with matter complexity and platform terms.

When Relativity wins

AmLaw firm with established Relativity infrastructure
Complex multi-matter management
Heavy customization requirements
Existing Relativity-trained staff

When DISCO wins

Mid-size firm wanting modern architecture
Cloud-native preference
Simpler operations requirement
Faster deployment needed

What we deploy

For AmLaw firms working with us: typically Relativity due to existing infrastructure.

For mid-size firms: DISCO increasingly the choice for modern architecture.

For both: the platform choice matters less than the workflow discipline (TAR protocols, QC, defensibility).

Bottom line

Both are competent eDiscovery platforms with AI. Relativity is the AmLaw default; DISCO is the modern challenger. Choose based on firm scale, existing infrastructure, and operational preferences.

The platform choice matters less than:

TAR protocol design
Quality control discipline
Defensibility documentation
Attorney supervision

Operator excellence on top of either platform delivers strong results.

Frequently asked questions

Which is better, Relativity or DISCO?

Different fits. Relativity for AmLaw with existing infrastructure and customization needs. DISCO for mid-size firms wanting cloud-native simplicity. Output quality is comparable on most matters.

What do they cost?

Both are per-matter pricing scaling with document volume. Small matters: $5-20k. Mid-size: $20-80k. Large: $80-500k+. Specifics vary with platform terms and matter complexity.

Should I switch from Relativity to DISCO?

Major change. Workflow rebuild, staff retraining, integration adjustments. Don't switch unless specific reason justifies disruption. Many firms run both for different matter types during transition.

Do they require custom TAR training per matter?

Yes — both require seed set training per matter. Custom training is essential for defensibility. Most matters need iterative refinement to reach acceptable accuracy.

Which is more defensible?

Both are equally defensible when deployed with proper TAR protocols, sample validation, and documented process. Defensibility comes from operator discipline, not platform choice.

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