Best Private Investigation Service in Seattle

Expert recommended Top 3 Private Investigation Service in Seattle, Washington. All of our private investigators face a rigorous 50-Point Inspection, which includes customer reviews, history, complaints, ratings, satisfaction, trust, cost and general excellence. You deserve only the best!


140 LakeSide Avenue, Suite A28, Seattle, WA 98122 Directions

Since 2001

Criminal Defense, Personal Injury, Custody Disputes, Corporate Investigations, Surveillance, Asset & Back Ground Checks

Casey Investigations is a full-service investigation firm has 28 years of investigative experience that no case is too small or too big that they handle all situations. The firm implements its services for individuals, businesses, and organizations. Mario Torres and his knowledgeable and helpful investigators obtain evidence promptly. They utilize the latest surveillance procedures and tools to render affordable and reliable service. Casey Investigations specializes in all manner of inquiries and handles your process help quickly, efficiently. They perform statewide coverage and open 24-hour day assistance.

License #1133

Send Email


Open 24 Hours

TBR® Inspection Report


PO Box 78141, Seattle, WA 98178 Directions

Since 2015

Criminal, Civil, Domestic, Background, Maritime/Fisheries Investigations, Infidelity, Child Custody Cases, Asset Searches, Evidence of Abuse, Personal Injury Claims, Corporate Fraud, Surveillance, Witnesses Locates, Witness Interview & Data Collection

Rain City Investigations, LLC is a veteran-owned private investigation agency with over 20 years of investigations training, education, and experience. The firm was headed by a former federal law enforcement officer who gives specific high-end investigative service to their customers, focused on giving you the best closure. They also hold a contract to carry general background inquiries for five federal law enforcement and intelligence companies. Rain City Investigations also handles subject and witness interviews, review police records and reports, and coordinate monitoring. Contact them and get a free consultation.

License #2432

Send Email


Open 24 Hours

TBR® Inspection Report


609 SouthWest 150th Street, Suite 66297, Seattle, WA 98166 Directions

Since 2013

Adultery and Infidelity, Asset Recovery, Child Custody-Protection, Civil, Employee Harassment, Computer Security, Corporate, Crime Scene, Criminal, Cyber Crime, Employment Verification, Attorneys, Employee Theft, Personal Security Fraud, Skip Trace & Worker's Compensation

Washington State Investigators, LLC is a wide-ranging detective firm that has access to proprietary databases for research. Wolfgang Grasst founder and principal perform computer monitoring using specific software that they remotely gather data about the activities performed. Their crew solves cases effectively and efficiently, with access to specialty service resources. They regularly interact, rendering you with new data and status updates about your case. WSI integrates resources to use to solve queries and answer questions, decreasing time and effort, and saving their customers money. Connect with them to get a complimentary consultation.

License #4287

[email protected]



Mon - Fri 8:00 am - 7:00 pm
Sat & Sun 10:00 am - 3:00 pm

TBR® Inspection Report