01
Structure
Drop in everything, exactly as it arrives. MatterOS designs an intake around this matter — classifying, de-duplicating, and indexing every page.
SOONFounding access opens soonFounding access is opening to a small group of firmsDrop in the matter.
Drop in the matter.
Get back the case.
MatterOS reads every file you give it—pleadings, email, transcripts, records, productions—and assembles one structured, chronological, source-cited work product. Then it keeps building, file after file, for the entire life of the matter.
Matter 2025-0417 · Meridian Freight v. Halstead Logistics
01Intake
0 pp- READING
Complaint_Filed_2025-03-14.pdf
38 pp · Pleading
Halstead_email_export.mbox
2,114 messages
Depo_R_Okafor_Vol1.txt
212 pp · Transcript
Master_Services_Agreement.docx
46 pp · Contract
Shipment_ledger_Q3.xlsx
9,480 rows
Warehouse_photos_0412.zip
63 images
02Chronology
0 events03Matter brief
auto-updatingParties
0
Key dates
0
Exhibits
0
Issues
0
Cross-referencing sources…
PleadingsCorrespondenceDeposition transcriptsMedical recordsContractsDiscovery productionsExpert reportsCourt ordersText messagesInvoices & ledgersPhotos & exhibitsPolice reportsHearing transcriptsInterrogatoriesPleadingsCorrespondenceDeposition transcriptsMedical recordsContractsDiscovery productionsExpert reportsCourt ordersText messagesInvoices & ledgersPhotos & exhibitsPolice reportsHearing transcriptsInterrogatories
The problem
Every matter begins as a pile. Thousands of pages across dozens of folders, and a team that must somehow hold all of it in their heads. Chronologies are built by hand. Summaries go stale the day they are written. New files arrive and the work starts over. MatterOS turns the pile into the case — and keeps it that way.
How it works
From file dump to working record, automatically.
No templates to configure. No folders to organize first. MatterOS reads the whole matter at once and builds the structure the matter actually needs.
02
Understand
Parties, claims, facts, and contradictions are understood across files, not one document at a time. Every file informs every other.
03
Chronologize
A single, source-linked timeline of the matter emerges — each event pinned to the page, line, or message it came from.
04
Summarize
Matter briefs, witness profiles, and issue memos written in the language of the practice — ready to review, edit, and rely on.
Then it keeps going.
Add a production, a transcript, a single email. MatterOS re-reads the matter around it and updates every chronology, summary, and open question — and shows you exactly what changed.
The work product
Not a folder.
A living case file.
The output isn't a pile of per-document summaries. It's attorney work product — organized the way you think about the matter, and cited down to the page.
Every sentence cites its source
Click through to the exact page, line, or message.
Contradictions surface themselves
Testimony against documents, witness against witness.
Gaps become visible
Missing custodians, silent date ranges, unanswered questions.
2024-01-09
Master Services Agreement executed; 48-hour delivery SLA and written-notice clause.MSA §4.2, §11.1
Contract2024-09-18
First missed delivery window recorded in Halstead's own ledger.Ledger r.3112
Fact2024-10-02
R. Okafor emails ops leadership warning of a capacity shortfall.Email #1448
Key2024-10-21
Halstead's letter states it “had no notice” of performance issues.Ltr. HAL-0092
Disputed2025-03-14
Complaint filed asserting breach of contract and negligence.Compl. ¶1–12
PleadingThe matter's operating system
One system from intake to verdict.
MatterOS isn't a tool you open once. It's where the matter lives — and it gets more valuable with every file, every hearing, every month.
- 1
Intake
The entire file becomes a structured matter within the first day.
- 2
Pleadings
Claims and defenses mapped to the facts that support or threaten them.
- 3
Discovery
Productions absorbed as they land — gaps and hot documents flagged.
- 4
Depositions
Outlines drawn from the record; testimony checked against it after.
- 5
Motions
Fact sections that cite themselves, from a chronology you already trust.
- 6
Trial & resolution
Witness binders, exhibit maps, and a matter brief that's always current.
Principles
Built for the standard you’re held to.
Cited, always
Nothing appears in your work product without a pinpoint citation back to the record. If it can't be sourced, it isn't stated.
Confidential by design
Built from the first line for privileged material — each matter kept in its own walled space, and your files never used to train models.
The attorney decides
MatterOS does the reading, organizing, and drafting. You exercise the judgment. Every output is yours to review, edit, and own.
Founding access
Something better is coming to the practice of law.
We’re opening MatterOS to a small group of founding firms first. Tell us a little about your practice and we’ll save your place.