DefendantOS Join early access
PRO SE CIVIL DEFENSE

The case operating system built for civil defendants.

Turn the complaint, contracts, correspondence, and discovery into a source-linked map of what the plaintiff alleges, what they must prove, and what the evidence actually shows.

Get early access See the case map
Built for defendants Every finding linked to a source Human decisions stay in control
DefendantOS / Plaintiff Burden Matrix
Record mapped
CASE MAP

Commercial guaranty claim

4 elements identified
PLAINTIFF MUST PROVE
PLAINTIFF'S SUPPORT
CONTRARY RECORD
STATUS
Valid guaranty Execution and enforceable terms
Signed guaranty Exhibit B · p. 2
Authority disputed Email 14 · p. 1
Disputed
Underlying default Breach under loan documents
Default notice Complaint ¶41
Continued performance Statements · p. 8
Gap
Amount due Balance and damages calculation
Payoff schedule Exhibit F · p. 4
Payment not credited Wire receipt · p. 1
Review
Potential contradiction Source linked
“No notice was provided.”
Complaint ¶42
VS
“Thanks for the update.”
Email · Jun 2
Next dates Confirm manually
Discovery response
Status conference
Deposition notice
✓
Claim tracedComplaint → Exhibit
!
Evidence gapNo delivery proof
The plaintiff's burden, made visible

Start with what has to be proven—not with a generic chatbot.

DefendantOS structures the case around the plaintiff’s claims and the record supporting or undermining each required element.

01
AL

What is alleged?

Break the complaint into claims, numbered allegations, parties, dates, and requested relief.

02
PR

What must be proven?

Organize the legal and factual elements the plaintiff must establish for each claim.

03
EV

What does the record show?

Connect exhibits, agreements, emails, testimony, payments, and court filings to each issue.

04
GP

Where are the gaps?

Surface unsupported assertions, missing records, contradictions, and questions requiring review.

Built around the defense side

A workflow for answering, testing, and challenging the plaintiff’s case.

General legal AI answers questions. DefendantOS builds a persistent, auditable defense workspace around the actual case record.

01 Separate allegations from evidence and inference
02 Track admissions, denials, and insufficient-knowledge responses
03 Match discovery requests to unresolved evidence gaps
04 Build deposition questions tied to documents and contradictions
05 Prepare a structured package for limited-scope counsel
Defense readiness Case workspace
Complaint mapped 64 allegations grouped under 4 claims
Complete
Plaintiff evidence reviewed 12 exhibits linked; 3 assertions unsupported
Review
Contradictions identified 5 statement-to-document conflicts
5 found
Discovery gaps Missing notices, calculations, and communications
8 open
Attorney handoff packet Timeline, matrix, sources, and open questions
Ready
One connected record

The tools a defendant needs before drafting the next paper.

BM

Plaintiff burden matrix

See each claim element beside the plaintiff’s alleged facts, supporting documents, contrary evidence, and unresolved gaps.

CT

Contradiction tracker

Compare pleadings, emails, documents, discovery responses, and testimony side by side.

TL

Source-linked timeline

Turn years of events into a chronology where every entry opens the underlying page.

DG

Discovery gap map

Connect unanswered questions and missing proof to possible document or deposition requests.

DL

Deadline workspace

Surface dates from orders and filings while clearly requiring human confirmation.

AH

Attorney-ready handoff

Give limited-scope counsel a structured case map instead of an unsorted document dump—reducing the time spent finding the basic facts.

Initial focus

Pro se civil defendants with document-heavy business cases.

DefendantOS is being designed first around disputes where the record matters as much as the pleading.

01
Personal guaranty claimsLoans, leases, and business obligations
02
Contract disputesPerformance, notice, waiver, damages, and interpretation
03
Commercial loan casesDefault, payoff, collateral, communications, and calculations
04
Commercial lease disputesObligations, notices, payments, repairs, and termination
Why DefendantOS

Not another “ask legal AI anything” box.

The product is designed to preserve the case record, show its work, and make uncertainty visible.

Generic answerPersistent case workspace
Unverified summaryPage-level source links
Plaintiff and defendant agnosticDefense-specific workflow
One-shot document draftClaims, evidence, gaps, and review
Opaque confidenceFacts, allegations, and inferences labeled
Private beta

Help build the defendant-side case operating system.

Join the early-access list for product updates and invitations to test the first New York civil-defense workflow.

No document upload required. No spam.

Clear boundaries

Built to organize legal work—not pretend to be your lawyer.

Is DefendantOS a law firm?

No. DefendantOS is software that helps users organize and understand legal information. It does not represent users or create an attorney-client relationship.

Does DefendantOS give legal advice?

The planned product focuses on document organization, source-grounded legal information, issue spotting, and preparation. Important legal decisions should be reviewed with a qualified attorney.

Which cases will it support first?

The initial focus is New York civil business disputes, including contract, guaranty, commercial-loan, and commercial-lease claims.

Will the system invent case citations?

The product is being designed around citation retrieval and verification, with unsupported propositions and uncertain matches visibly flagged rather than presented as established authority.

Can a lawyer use the workspace too?

Yes. Attorney collaboration and a structured handoff packet are planned so a user can obtain limited-scope review without forcing counsel to reconstruct the entire record from scratch.