Funding led by N47, with participation from Andreessen Horowitz's American Dynamism practice, will expand Longeye across local, state, and federal justice agencies; Longeye expands Ambassador Team to help agencies transition to AI workflows
SAN FRANCISCO--(BUSINESS WIRE)--Longeye, the leading AI-powered investigative workspace built for the justice system, has raised a $20 million Series A led by N47, with participation from Andreessen Horowitz's American Dynamism practice, and now has more than 50 justice agencies using the platform.
Those agencies have worked more than 2,300 investigations on Longeye, reviewing more than 15 million pages of documents, more than 10 million images, more than 32,000 hours of audio and video and more than a billion rows of financial and phone records. That represents more than 200,000 investigator-hours of evidence review, the equivalent of 100 investigators working full-time for a year. The casework includes at least 230 homicide investigations and at least 160 sexual violence cases.
Longeye works with local, state, and federal agencies across the U.S., and the funding will accelerate that growth.
Modern investigations generate more digital evidence than detectives can reasonably review by hand. In 2025, 14,085 people were murdered in the United States, 123,332 rapes were reported to police, and the FBI logged nearly $21 billion in internet crime losses, more than the City of Chicago's entire annual budget. Violent crime has fallen, but the evidence behind each case keeps growing: phones, message threads, bank records, video and jail calls, landing on teams already carrying full caseloads.
"Every investigation now produces evidence that could make the justice system more effective and more fair, and much of it goes unread because no one has the time to work through it," said T.J. Rylander, General Partner, N47. "When we spoke with agencies on the platform, investigators kept telling us Longeye was getting them through evidence that would otherwise have sat untouched, in a way they could check and defend. The Longeye team is taking a long-term, responsibility-first approach that stands out from the other companies in the space. We didn't see that anywhere else in the market."
Longeye lets investigators search and analyze evidence already collected in an investigation. While much of the market wraps general-purpose chatbots with little additional underlying infrastructure, Longeye pioneered the Faraday Method, an engineering system designed from day one around how criminal justice information has to be handled. Longeye has filed patents for its citation engine, which links every substantive finding to the original message, document, or recording, allowing investigators to verify the source before relying on it. Longeye meets the requirements of the FBI's CJIS Security Policy, and agencies retain ownership of their data.
"Investigators are going to use technology to get through the amount of evidence they now face," said Denton Carlson, former chief of the San Ramon Police Department, a board member of the California Police Chiefs Association and the leader of Longeye's Ambassador Team. "For agency leaders, the question is whether that work happens inside a system where you can control the data, reconstruct what happened, and verify the result. That is the standard departments need as AI becomes part of investigative work."
Carlson is joined on Longeye's expanded Ambassador Team by Carrie Ellis, president of the Texas Police Chiefs Association, and Slate Chisholm, former detective with the Metro Nashville Police Department. The group will work with agencies on implementation, training, and the responsible adoption of AI in investigative workflows.
"We were giving up so much time combing through jail calls, videos, cell phone downloads, search warrant returns, financial records and spreadsheets," said Lauren Cunningham, a homicide detective with the Oklahoma City Police Department. "Longeye helps our detectives find the few minutes or few pages that matter most in all of that data, and it has turned up valuable evidence we could have missed or would have taken weeks to find. Personally, I've been able to spend more time following up on time-sensitive information and out in the field where the work matters most. At the end of the day, Longeye gives us more time to do what we became detectives to do: investigate cases, uncover the truth, and bring resolution to victims and their families."
Longeye also serves public defenders through a grant program that provides free access to eligible public defender offices and defense nonprofits, extending AI-assisted evidence review to both sides of the justice system.
"Every crackdown in America, on fraud, on narcotics, on violent crime, runs on terabytes and terabytes of evidence," said Guillaume Delépine, co-founder and CEO of Longeye. "AI can get investigators through all of it, but only if they stay in control of the evidence and can verify what the system tells them. We are building Longeye to the highest standards of artificial intelligence, compliance, and integrity to bring meaningful relief to the justice system as a whole."
About Longeye
Longeye is the AI-powered investigative workspace built for the justice system. Police departments, sheriff's offices, prosecutors, and public defenders use Longeye to search and analyze large volumes of digital evidence, including jail calls, warrant returns, phone extractions, video, financial records, and document sets. Founded in 2025 and headquartered in San Francisco, Longeye serves agencies across the United States and is backed by N47 and Andreessen Horowitz's American Dynamism practice. Learn more at longeye.com.
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