Longeye has raised $20 million in Series A funding to expand its AI-powered investigative platform across local, state, and federal justice agencies in the U.S. The financing was led by N47, with participation from Andreessen Horowitz’s American Dynamism practice. Longeye said more than 50 justice agencies are already using its platform to review and analyze large volumes of digital evidence.
Those agencies have worked on more than 2,300 investigations using Longeye, including at least 230 homicide investigations and at least 160 sexual violence cases. The platform has been used to review more than 15 million pages of documents, more than 10 million images, more than 32,000 hours of audio and video, and more than one billion rows of financial and phone records.
Longeye estimates that this work represents more than 200,000 investigator-hours of evidence review, equivalent to approximately 100 investigators working full-time for a year.
The company’s platform helps investigators search and analyze evidence collected during an investigation, including jail calls, warrant returns, phone extractions, video, financial records, spreadsheets, and large document sets.
Longeye developed what it calls the Faraday Method, an engineering framework built around the requirements of criminal justice information. The company has also filed patents for a citation engine that connects substantive findings back to the original message, document, recording, or other source material so investigators can verify results before relying on them.
The company said its platform meets the FBI’s Criminal Justice Information Services Security Policy requirements, while participating agencies retain ownership of their data.
Longeye plans to use the Series A funding to expand adoption across justice agencies and grow its Ambassador Team, which assists departments with implementation, training, and the responsible adoption of AI-based investigative workflows.
The Ambassador Team is led by Denton Carlson, former chief of the San Ramon Police Department and a board member of the California Police Chiefs Association. He is joined by Carrie Ellis, president of the Texas Police Chiefs Association, and Slate Chisholm, a former detective with the Metro Nashville Police Department.
Longeye also runs a grant program that gives eligible public defender offices and defense nonprofits free access to the platform, extending AI-assisted evidence analysis to defense organizations.
Founded in 2025 and headquartered in San Francisco, Longeye plans to expand beyond its current agency base as investigators face growing volumes of digital evidence in increasingly complex cases.
KEY QUOTES:
“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. 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.”
TJ Rylander, General Partner at N47
“Investigators are going to use technology to get through the amount of evidence they now face. 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.”
Denton Carlson, Leader of Longeye’s Ambassador Team
“We were giving up so much time combing through jail calls, videos, cell phone downloads, search warrant returns, financial records and spreadsheets. 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.”
Lauren Cunningham, Homicide Detective with the Oklahoma City Police Department
“Every crackdown in America, on fraud, on narcotics, on violent crime, runs on terabytes and terabytes of evidence. 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.”
Guillaume Delépine, Co-Founder and CEO Of Longeye
