About Us

Diffeo grew out of research evaluating algorithms for helping people discover new knowledge to add to a knowledge base like Wikipedia.

Diffeo Engine

The hierarchical tree graph structure illustrates how Diffeo's cross-document cross-lingual interactive entity disambiguation algorithms help users discover new knowledge.

Cloud Search

Cloud Search began with a Desktop that looked like this. Jason was helping his mom track down some of her files (and failing). She had 356 files on her Desktop alone, and was constantly creating and receiving more. We built a search tool to solve her problem.


John Frank
  • John Frank *
  • CEO and Co-Founder
  • John's previous startup, MetaCarta, pioneered map-based entity search and was acquired by Nokia in 2010, where he served as Chief Architect for Search until 2012. John has a B.S. from Yale, loves solar cars, and is a Hertz Fellow at MIT in soft condensed matter physics.
Geoffrey Milstein
  • Geoffrey Milstein *
  • VP Federal Programs
  • Geof has led teams supporting the Federal Community for 38 years with such companies as Unisys, Data General/EMC, Veritas/Symantec. He joined John at MetaCarta in 2008 and then Qbase when they acquired MetaCarta's federal group. Geof spent his military career with the 82d Airborne and the 3d Infantry Divisions.
Jason Briggs
  • Jason Briggs
  • Co-Founder, COO
  • While studying computer science and military history at Williams College, Jason co-founded Meta Search in 2014 after watching his mom try, and fail, to find files on her computer. Meta launched to thousands of beta users before being acquired Diffeo in 2016. As Diffeo COO, Jason has led partnerships with Salesforce and the FinTech Innovation Lab in NYC .
Aaron Taylor
  • Aaron Taylor
  • Co-Founder, VP Engineering
  • Aaron built the Cloud Search stack from scratch. He is now responsible for architecting Diffeo's cloud services and keeping them running for our users. He studied Computer Science and Political Economy at Williams College.
Max Kleiman-Weiner
  • Max Kleiman-Weiner *
  • Co-Founder, Chief Scientist
  • Max is a co-founder of Diffeo and a Hertz Fellow at MIT in computational cognitive science and machine learning. He has worked as an associate at McKinsey & Company and as a Fulbright Scholar in Beijing. Max has a BS from Stanford where he was a Goldwater Scholar and was a Marshall Scholar at Oxford in Applied Statistics.
Dan Roberts
  • Dan Roberts
  • Co-Founder
  • Dan is a co-founder of Diffeo and a theoretical physicist with a long-standing interest in machine learning and artificial intelligence. His work focuses on black holes and quantum chaos, offering insight into the relationship between the laws of physics and the limits of computation. Dan’s background includes a postdoc at the IAS in Princeton, New Jersey and a Ph.D. from MIT, where he was a Hertz Fellow. Dan was also a Marshall Scholar, earning Master's degrees from both Cambridge (Maths) and Oxford (CS).
Emily Pavlini
  • Emily Pavlini
  • Co-Founder, Product Manager
  • Emily is responsible for customer happiness. She has had thousands of conversations with Cloud Search users and is always pushing to improve their experiences. She graduated from Williams College with a degree in Economics and History.
Keith Gabryelski
  • Keith Gabryelski
  • Director of Client Applications
  • Keith has over 20 years of startup and enterprise software experience. He holds eight software patents and enjoys working on large-scale, highly available systems.
Andrew Gallant
  • Andrew Gallant
  • Senior Systems Engineer
  • Andrew received his B.S. in CS and Math from Worcester State and MS in CS from Tufts University, specializing in computational biology. His published research includes compressive genomics, remote homology detection and functional programming. Andrew spends much of his free time contributing to open source projects like the Rust programming language.
Tom Dubois
  • Tom Dubois *
  • Senior Systems Engineer
  • Tom received his Ph.D. from the University of Maryland where he developed and analyzed graph algorithms for improving the containment of epidemics. Since then he has worked on designing and applying statistical graph algorithms for cloud and other non-traditional computation environments, as well as building full-stack web applications.
Cogan Culver
  • Cogan Culver *
  • Director of Analysis
  • Cogan is responsible for managing our analytic services and training portfolio. He has nearly 15 years of analytical experience in the federal government, primarily focused on all-source analysis. Cogan earned a Master of Arts in Anthropology from George Mason University where his research focused on police militarization in the United States post 9/11.
Henry Wallace
  • Henry Wallace
  • Software Engineer
  • Henry received his Sc.B. in Computer Science and Mathematics from Brown University specializing in Natural Language Processing. As an undergraduate, Henry researched methods for clustering folksonomic tags from online collaborative systems, and analyzed poetic features from historical Arabic texts.
Logan Zoellner
  • Logan Zoellner *
  • Software Engineer
  • Logan received his B.S. in Mathematics with a minor in Russian from the University of Notre Dame. He has worked in the areas of cryptanalysis and big-data. At Diffeo, his primary focus is leveraging machine-learning to maximize customer effectiveness.
  • David Johnson
  • Software Engineer

David graduated from Tufts University in 2011 with a degree in Physics and Philosophy, where he focused on epistemology and philosophy of science. As a research assistant at MIT, he worked on protein modeling and protein folding. He enjoys ice climbing and cycling.
Abdi Dirie
  • Abdi Dirie
  • Software Engineer
  • Abdi received his B.S. and M.Eng. degrees from MIT in Computer Science and Engineering. During his master's program, he worked in the MIT Natural Language Processing Group, where he worked on neural models for information extraction and transfer learning, with applications to e-commerce.
Andrew Haskell
  • Andrew Haskell
  • Software Engineer
  • Andy works on Diffeo's core systems. Previously he built computational biology software at MIT. He graduated from Tufts University with a degree in Computer Science and Biology.
Kevin Doyle
  • Kevin Doyle
  • Software Engineer
  • Kevin focuses on natural language processing. He graduated from UC Santa Cruz with a degree in Computer Science and was a member of the triathlon team.
Tyler Balensiefer
  • Tyler Balensiefer *
  • Subject Matter Expert
  • Tyler Balensiefer is an analyst with Diffeo. He's a Purdue grad, an Army veteran, and has over 8 years of analysis experience.
Wil Sam
  • Wil Sam *
  • Subject Matter Expert
  • Wil is a combat veteran. He is responsible for customer engagements, training, and workflow improvement. His 13 years of analytical experience include all-source analysis, process improvement, and instructing all-source curriculum for operational and strategic level intelligence professionals.
Eugene Kuznetsov
  • Eugene Kuznetsov
  • Board of Advisors
  • Eugene received his B.S. and M.Eng. degrees from MIT, founded several companies, including DataPower (acquired by IBM), and works with a wide range of technology startups.
Don Zereski
  • Don Zereski
  • Board of Advisors
  • Don served as Vice President of Local Search & Analytics at HERE, a Nokia company. Before joining Nokia, Don was CEO at MetaCarta, a pioneering enterprise local search company with customers such as global intelligence agencies and large oil companies. Previously, Don served as VP of Products for Lycos. Don originally joined Lycos through the acquisition of Tripod, where he was VP of Technology.
David Weinberger
  • David Weinberger
  • Board of Advisors
  • David, Ph.D. in Philosophy from U. Toronto, explores the Internet's effect on our ideas and business, in books including The Cluetrain Manifesto (co-author), Small Pieces Loosely Joined, articles for HBR, Wired, Scientific American, and talks around the world. He has been a marketing VP and consultant, a Franklin Fellow at the US State Dept, and a senior researcher at Harvard's Berkman Center.
Carl Hoffman
  • Carl Hoffman
  • Board of Advisors
  • Carl founded Basis Technology in 1995. Today, Basis Technology is recognized as the leading provider of components for information retrieval, entity extraction, and entity resolution in many languages. Carl has been directly involved with Basis Technology’s activities in support of national security missions, and works closely with analysts in the U.S. intelligence community.

* Strategic Advisor

Get started with Diffeo!