Chainlocker is a local, AI-powered eDiscovery tool, document indexing and review for CPA transaction services and legal discovery. It reads every file in an engagement folder, judges each one against criteria you define, and produces a reviewable, court-ready index, without a single document leaving your premises. A chain locker is where an anchor chain is flaked so a heap pays out clean; that's the job.
Your tags, per engagement. Nothing is hardcoded, a CPA deal and a legal matter are just different criteria lists.
Point it at the shared folder. It lists every file it understands. PDF, Office, email, images, and a dozen more.
Text extraction locally, OCR for scans. AI assigns each document a tag, written reasoning, and a confidence score. Async, you get an email when it's done.
Accept by default; reject with a correction. Cheap to review at volume, and every verdict is recorded as structured data.
A self-contained package: the documents, the Excel index, and an HTML viewer that works with no server and no network.
Every engagement gets its own tag list and instructions. The tool adapts to the matter, transaction diligence, discovery, or anything shaped like "sort these documents."
PDF, Word, Excel, PowerPoint, email (.msg/.eml), text, CSV, XML, Markdown, and images including TIFF scans. Digital files are extracted directly; scans go through OCR.
Every judgment carries written reasoning and a confidence score, with a minimum-confidence threshold you control. No black-box tags.
The index is an Excel file your team already knows how to use, one row per document, with a clickable link straight to the file.
Corrections aren't thrown away. Every human verdict is captured as structured data and used to make the model better at your kind of work.
The export opens straight off a laptop or USB drive, no app, no internet, no absolute paths. Built for the courtroom, where wifi isn't a given.
Legal discovery and litigation support: tag a production against your matter's criteria, flag privilege for review, and hand opposing counsel, or the court, an index you can defend, fully offline.
Transaction services and due diligence: point it at the deal folder and get every contract, statement, and side letter tagged against your diligence checklist, with reasoning attached.
Forensic accounting, internal investigations, insurance claims, the criteria are yours per engagement, so anything shaped like "sort these documents against what matters" fits.
The tool runs on a Median-owned machine installed at your office and is reached from a browser on your LAN or private VPN. AI inference runs on Median-owned hardware over an encrypted private network, both ends of the wire are accountable to you by contract. No third-party AI APIs means no metered usage: the cost is fixed, however big the folder.
Ask us about the deployment model →Radtke Fournier CPAs is an example firm built on example data. The live product reads documents on your own premises.
Open the Review tab and click through the documents, or press J and K to move between them.
We're targeting availability by the end of 2026. Chainlocker ships once it has survived real eDiscovery engagements, not before. If your firm drowns in engagement folders, tell us what the pile looks like and we'll tell you honestly whether this tool will help, and when.