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Executive Brief

The Maturity Stack — Where You Stand Today

The Maturity Stack places every legal function on a five-band progression from Foundational to Defensible. Four lenses — Adoption, Sophistication, Defensibility, and Autonomy — produce a composite score that surfaces the most consequential capability gaps.

22 May 2026

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9 min read

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By Advanta Research

The Maturity Stack — Where You Stand Today

Legal AI programmes fail to progress not because they lack tools, but because they lack an accurate picture of where they stand. The Maturity Stack addresses that gap.

The five bands

Five bands define the progression:

Foundational — AI tools deployed ad hoc; no governance; no formal programme; individual practitioners experimenting without institutional oversight.

Operational — A defined programme exists; use cases are approved; basic policy is in place; no systematic measurement.

About Advanta Research

Advanta Research produces evidence-based analysis on legal AI transformation, governance, and operations.

Key Takeaways

  • The Maturity Stack maps every legal function onto five bands, from Foundational to Defensible, based on how AI is deployed and governed.

  • Four lenses — Adoption, Sophistication, Defensibility, and Autonomy — combine into a weighted composite score that highlights capability gaps.

  • Defensibility carries the highest weight because regulatory and stakeholder scrutiny arrives before AI programmes are fully mature.

  • Two instruments, a Free Baseline Diagnostic and Diagnostic Pro, provide fast placement and deep benchmarking against peer legal functions.

Related Resources

Module Library →Take the Maturity Diagnostic →

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