Why choose this provider?
Need help contacting a Private Investigator in Portland? Call our Concierge team at 848-Book-Pro (848-266-5776 from 6 am - 4 pm PT | Mon - Fri). They are standing by to help you get the service you need.
2025
Last updated:
Our goal is to connect people with the best local professionals. We scored Portland private investigators on more than 25 variables across five categories, and analyzed the results to give you a hand-picked list of the best.
139Reviewed
86Curated
7Top Picks
Learn about our selection process.
Need help contacting a Private Investigator in Portland? Call our Concierge team at 848-Book-Pro (848-266-5776 from 6 am - 4 pm PT | Mon - Fri). They are standing by to help you get the service you need.
Expert Investigations, Inc. is a Beaverton business that serves the Pacific Northwest. Services include litigation support, asset investigations, background investigations, human resources investigations, corporate and business investigations, risk management, insurance fraud, skip tracing, witness locates, and interviews and statements. Myron B. Sanders graduated from the National FBI Academy in Quantico, Virginia, and he has over nine years of law enforcement experience.
Cornerstone Investigative Services, Inc. provides comprehensive investigation services to people and organizations in Portland, throughout Oregon, nationally, and overseas. Its team has over 100 years of combined experience in the public and private sectors. The agency customizes investigative strategies for each case, aligning them with the distinct requirements of individuals, corporations, law firms, or insurance companies. Cornerstone's private investigations are conducted to locate, document, and provide information to parties so that they can make informed decisions moving forward.
Northwest Investigations & Consulting LLC is a Portland business that has been serving clients for over 26 years. Services include professional surveillance, corporate and legal investigations, background checks, missing person location, domestic matters, fraud investigations, commercial and general liability, and construction defect. Northwest Investigations & Consulting LLC offers a free consultation and is on call 24 hours a day. The business is a member of many organizations including the Association of Licensed Investigators, the Oregon Casualty Adjusters Association, and the Forensic Accident Reconstructionists of Oregon.
PI Services, LLC is a Beaverton business that has been serving Oregon for more than 18 years. Services include private investigation, information retrieval, GPS tracking, small claims, background checks, process serving, and writs of garnishments. PI Services, LLC serves the general public, insurance companies, corporations, process servers, collection departments, nanny companies, attorneys, and private investigators, and provides a free consultation. The private investigators are state licensed and experience. Clients appreciate their knowledge, responsiveness, and professionalism.
Gunderson Services is a Portland business that serves attorneys, small and large businesses, and individuals. The business has offices in Oregon and Washington, and provides services including injury claims, domestic issues, surveillance, background profiles, fraud claims, asset searches, insurance claims, liability case assistance, employment profiles, and threat management. Gunderson Services tailors services to clients’ needs and also serves federal government agencies, local and national banks, and clients around the world.
Diligent Investigations, LLC is a Portland business that has been serving clients for over 12 years. Owner Robert Grady is a licensed private investigator. The business’ services include process serving, surveillance, court records searches, background checks, missing persons and locates, and legal investigations. Diligent Investigations, LLC is bonded and insured and offers free consultations.