Digital Extensions
Digital Extensions — Software Studio

Software grounded in
primary sources.

We build tools for professionals who work directly with complex source material — and for developers navigating an AI-first world. Precision, provenance, and control. No hidden inference.


Our Products

Legal & Investigative Professionals

Corpus Review

An evidence-first analysis workspace for legal professionals, expert witnesses, and investigators working with large document sets. Local-first. Deterministic. No AI. No automation. Just transparent reasoning from assertion to source.

  • Annotate with exact provenance — page, paragraph, character offset
  • Build cross-references — link related passages across documents
  • Construct chronologies — each entry linked to its source
  • Export with provenance — every statement traces back to its origin
Built For
  • Medical negligence litigation
  • Complex litigation review
  • Expert witness preparation
  • Regulatory review & compliance
  • Early case assessment
  • Investigative document work

14-day free trial. Fully functional. No account required.

Download Corpus Review

Corpus Dev Kit

Early Access

Extends Corpus Review into the development workflow. Build a canonical corpus, dispatch AI agents via structured Directives, and watch them report back — all grounded in authoritative documentation.

Request Early Access →

Markers Helper

A privacy-first grading workspace for college educators. Grade smarter with custom rubrics, offline security, and effortless FERPA compliance. Student data never leaves your machine.

Learn More →

01

Precision & Provenance

Every assertion traceable to its origin. Tools for professionals who work directly with complex source material — where ambiguity carries real cost.

02

Local-First & Deterministic

Your data stays on your machine. Original files remain pristine. No cloud dependencies, no hidden inference, no automated conclusions made on your behalf.

03

Expert-Driven

Interpretation belongs to the expert. The software exists to support careful reasoning — not to replace it, automate it, or quietly introduce assumptions you didn't make.


Begin with the evidence.