Longeye has raised $20 million in Series A funding to expand an AI platform that helps law enforcement and legal teams analyze large volumes of digital evidence. The San Francisco-based company says more than 50 justice agencies already use its software to review phone records, video, financial transactions and other evidence collected during investigations.
The funding round was led by N47, with participation from Andreessen Horowitz's American Dynamism practice.
The company was founded in 2025 by Guillaume Delépine and Danielle Man, combining experience in public-sector technology sales at Skydio with engineering leadership at Apollo GraphQL.
Longeye is targeting a problem that has become increasingly difficult for criminal justice agencies: collecting digital evidence is often much faster than reviewing it.
How Longeye's AI Investigation Platform Works
Modern criminal investigations can generate thousands of files from phones, security cameras, financial institutions, messaging services and recorded conversations.
Investigators must identify which pieces of information matter, establish timelines and determine how evidence relates to particular events.
Much of that work remains manual.
Longeye provides a searchable workspace designed to help investigators organize and analyze material they have already obtained.
Its platform supports evidence including jail calls, search-warrant returns, mobile phone extractions, video, documents, financial records and spreadsheets.
Users can ask questions about the evidence, identify relationships between records and locate relevant information without reviewing every file individually.
For example, an investigator could search a collection of financial transactions for payments involving particular accounts, then compare those findings with communications or timestamps found elsewhere in the case.
Longeye's system is designed to link findings back to the original material so a human reviewer can verify the underlying evidence.
The company describes its retrieval architecture as the Faraday Method and says it has filed patents covering its citation technology.
That distinction is important: a patent application is not the same as a granted patent.
According to Longeye, its software meets FBI Criminal Justice Information Services security requirements and allows agencies to retain ownership of their data.
More Than 50 Agencies and 2,300 Investigations
Longeye has reported substantial growth since launching in October 2025.
According to its October 2026 announcement, more than 50 justice agencies have used the platform across over 2,300 investigations.
The company says those agencies have reviewed more than 15 million document pages, 10 million images, 32,000 hours of audio and video, and one billion rows of financial and phone records.
The casework includes at least 230 homicide investigations and 160 cases involving sexual violence.
Longeye estimates that its platform has supported work equivalent to more than 200,000 investigator-hours of evidence review.
These numbers are company-reported measures of activity, not independently verified hours of labor saved.
A separate Washington Post investigation published in April 2026 examined early deployments, including use by the Oklahoma City Police Department.
Detectives described reductions in time spent reviewing jail calls and financial records, while also emphasizing the need to check information against original evidence.
At the time of that reporting, many cases involving the technology had not yet been fully tested through court proceedings.
The Funding and Its Commercial Opportunity
The Series A follows a previously announced $5 million seed round led by Andreessen Horowitz's American Dynamism fund.
Longeye has therefore announced approximately $25 million in cumulative financing.
The new capital will support expansion across local, state and federal agencies, as well as training and implementation.
The company is also expanding its Ambassador Team, which includes former law enforcement leaders who assist agencies adopting AI-based investigative workflows.
Longeye sells to police departments, sheriff's offices, prosecutors and public defenders.
It also offers a grant program intended to provide free access to eligible public defender organizations.
That broader market positioning matters because digital evidence is relevant to both prosecution and defense.
Competition in AI Software for Law Enforcement
Longeye operates in a market that includes established public-safety technology vendors and newer AI companies.
Axon provides digital evidence management and related law enforcement software, while Peregrine builds data integration and operational intelligence systems for public-sector organizations.
Longeye's narrower focus is evidence analysis, particularly searching large collections of information and linking findings to their sources.
That creates a potential advantage for agencies overwhelmed by records, recordings and digital case files.
However, being faster than manual review is not sufficient to establish reliability in criminal justice.
A generated summary may omit context, incorrectly connect individuals or misrepresent the significance of a document.
Even when a system correctly cites original material, its interpretation can still be wrong.
The Legal and Ethical Risks
The most significant challenge is accountability.
Investigators, prosecutors and defense lawyers must be able to understand how AI-generated findings were produced and challenge their accuracy.
Agencies also need policies covering retention, audit trails, disclosure obligations and access to sensitive information.
AI-assisted evidence review can create additional questions about whether relevant information has been overlooked or whether automated analysis influenced the direction of an investigation.
These concerns become particularly serious when evidence could affect criminal charges, detention or sentencing.
The Washington Post reported that courts and policymakers were still working through questions surrounding the disclosure and admissibility of AI-assisted investigative work.
Longeye says its approach keeps human investigators in control and connects conclusions to source material.
The next step is demonstrating that those safeguards remain effective across thousands of investigations, agencies and legal proceedings.
Longeye's commercial opportunity is substantial, but its long-term position will depend on verified accuracy, courtroom defensibility and whether its software improves investigative work without introducing new sources of error.