CiteProof checks brief citations and quotes against public court records. Free existence check; quote verification and Verification Record from $49 per brief.
Researched and fact-checked by Bartu Cavusoglu · Updated October 26, 2026
CiteProof is a citation and quotation checker for legal briefs. A lawyer pastes a brief or uploads a .docx or .pdf file, and CiteProof resolves every citation against public court records. In paid checks it also compares quoted passages with the opinions they claim to quote.
The product grew out of sanctions cases over fabricated citations, including Mata v. Avianca. The company describes it as a gate before filing, built on deterministic rules rather than an AI model, so a hallucinating checker cannot add its own errors.
A check has four steps. CiteProof extracts citations and quotes, resolves case cites through CourtListener and federal statute cites through GovInfo, compares names, courts and years with the record, and reports the result. Only citation strings are sent to those services, not the brief text.
Each item lands in Verified, Needs attention or Couldn't check. A report opens with a counts line, such as the number of citations and quotes found, so the reader can see whether the whole document was read. If part of it could not be read, a banner says so.
The free check covers existence and identity. Identity matters because a fabricated cite can point to a real reporter location occupied by a different case. Short forms such as Id. and supra resolve to their antecedent, and parallel citations count once.
Paid checks add quote verification, showing the closest passage beside the brief's wording with a pin cite and flagging changes such as a dropped "not". They also produce a Verification Record PDF and a verified Table of Authorities. An Adversary Audit applies the same engine to an opposing brief.
CiteProof is a web-based citation and quotation checker for legal briefs. It checks every citation against public court records and, in paid checks, compares quoted passages with the opinion. Each item is reported as Verified, Needs attention or Couldn't check.
Existence and identity checks are free. Quote verification with the Verification Record costs $49 for one brief or $199 for five briefs. Monthly plans are Solo at $199 and Small Firm at $499, and a limited founding pack offers five briefs for $149.
Yes. Free checks need no account, covering about 3 checks per browser. Signing in adds 5 free credits for full quote verification and the Verification Record, with no card required.
The company says this is its founding use case. Fabricated citations fail the existence check or resolve to a different case than the brief names, and altered quotes appear next to the real passage in paid checks. Its October 2026 measurement shows 0 false cleans on 17 bad holdout items, which it presents as a bound rather than a rate.
No. CiteProof does not give good-law verdicts. Every resolved citation carries a "Still good law?" box with citing-history searches as a starting point, and the company recommends keeping a citator for that.
Free checks never store the brief, only counts, timestamps and a session ID. Paid checks keep their findings for 90 days, and the Verification Record is emailed to the user. Only extracted citation strings are sent to CourtListener or GovInfo.
It offers a Word add-in, a Clio connection and an API (v1). It resolves case citations through CourtListener and federal statutes through GovInfo.
It does not check whether authority supports a proposition, whether it is still good law, facts, regulations, state statutes or secondary sources. Attorney review under Rule 11 is still required.