Features

Built for one job: trustworthy New York property-law research for working attorneys.

Ask — cited answers, streamed live

Plain-English questions answered from NY statutes, ten years of court decisions, DHCR guidance, court rules and official forms. Answers stream in as they're drafted, every assertion carries a citation, and follow-up questions keep the conversation's context.

A Casewise answer on the warranty of habitability with inline source citations

Verification you can see

Citations are mapped server-side to retrieved documents — markers that don't correspond to a real source are stripped before you see them. Every quoted passage is string-matched against the source text and the result is shown under each answer.

Quote verification line: all quotations verified word-for-word against the sources

Check cites — audit any document

Paste text or upload a PDF/Word brief. Statutes, NYCRR rules, and slip opinions verify against the corpus; reporter citations check against an offline catalog of 5.1 million published citations. Fabricated citations are flagged in red — it works on opposing counsel's filings too.

Citation audit table with verified citations and a fabricated citation flagged NOT FOUND

Building-grounded answers

Mention a NYC address and Casewise grounds the analysis in that building's public record: rent-stabilized unit indicators, open HPD violations by class, the registered owner, and marshal eviction history — cited as a source with a link to the underlying data.

Verified sources including a building record for 888 Grand Concourse with statute and guidance citations

Research memos in Word

One click exports an answer as a formatted .docx memo: Question Presented, Discussion, Table of Authorities, and a Verification Appendix recording the citation guarantee and quote-check results.

Point-in-time research

Set an as-of date and decisions or guidance that postdate it are excluded; statute sections amended after the date are flagged so reliance is caveated. Built for litigation over past events.

Search the sources directly

Semantic search across statutes, decisions, DHCR guidance, court rules and forms — filter by source type, with relevance grading and links to official texts.

Semantic search results across statutes and decisions with relevance grades

A corpus that maintains itself

New decisions flow in daily from the Official Reports feeds. Statutes are versioned so superseded text is kept, never overwritten. Every source records where it came from and when.