A comprehensive list of private detectives and agencies offering professional investigation services in Washington. Read unbiased customer reviews and recommendations of local investigators. 
Blackthorne Detective Agency provides private investigation services to the western Washington areas in both business and personal matters. We work with you to understand your needs and provide a custom investigative solution based on: Budget Timeframe Resources Needed Projected Deliverables.
Supplementing evidence with asset profiles and records research are Liston Investigative Services' specialties. With over 10,000 hours live surveillance experience, we're one of Washington State's top surveillance agencies. Call Liston Investigative Services for evidence collection and legal research in family law litigation.
Sojourner Shrink — Very communicative. Provided a great referral, friendly, answered a lot of my questions.
Since 1987 those needing the services of a PI have been assisted daily by ION's Investigators Anywhere Resource Line. ION team members pre-screen referred investigators when customers contact us direct. We bring nice customers and nice investigators together. ION is the only business in the world doing what we do and it has worked for 1000's of customers for over 20 years.
Reed S. — I have done business with Sandlin Private Investigators for years and they have always provided outstanding advice and services
An ounce of prevention is definitely worth a pound of cure. Our investigations and loss prevention programs are proven to increase the bottom line profits in almost every one of our client's businesses. We pride ourselves in creating a workplace that rewards the honesty and makes examples of those who steal from their workplace.
A. Z. — Save your money. Business owners can handle loss prevention situations themselves.
We provide safe, confidential services to our investigation and polygraph clients throughout all of Washington and Northern Oregon. One of our investigators schedules a discussion to determine what type of services will be appropriate for your situation. This is a complimentary service and is guaranteed to be private and confidential, your safety and privacy are our first priorities.
LMI has established sources and contacts for obtaining critical information in all fifty states and most countries. Our services are specifically tailored to each client's individual needs. Contact us for consultation, cost estimates, and any questions regarding your investigative needs. LMI's background research on persons and businesses is conducted locally, nationally and internationally.
Seabold Group is a premier Seattle-based investigation firm, specializing in public- and private-sector workplace investigations, forensic accounting, and civil and criminal litigation support. Our team of three investigators includes two attorneys and a certified public accountant and fraud examiner.
Our clients run the gamut from criminal and civil attorneys, concerned parents, to people in crisis. Yet they all have one thing in common: they need information that they can't get on their own. That's where we step in.