3 Best Private Investigation Service in Seattle, WA

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

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OLYMPIC TACTICAL & INVESTIGATIONS LLC

450 Alaskan Way South, Suite 200,
Seattle, WA 98104 Directions

Since 2007

Specialty:

Background Investigations Comprehensive Background Report Deceased Search Eavesdropping Detection Forensics Infidelity Investigations Insurance Investigations Person Location Services Phone Number Search Process Serving Social Media Internet Investigations Surveillance Services Protective Services Security Training Firearms Training OC Training Baton Training Handcuff Training

" Olympic Tactical & Investigations LLC is a full-service private investigations, security, and training company licensed and insured to meet your specific needs. Their experience and network of personnel allow them to assemble the right team of instructors, advisors, and agents for your specific requirements. The company was founded by Greg Glassock. They recruit, train, and develop industry-leading professionals to secure an advantage for their clients. Olympic Tactical & Investigations LLC incorporates advanced assessments and real-time intelligence from various sources to ensure thorough planning and effective decision-making. Their clients operate in challenging, dynamic environments where physical and cyber threats converge to create particularly demanding problems that require unique solutions. They use specialized skills, surveillance techniques, and ethical research methods to bring the truth to light. They have 50 Agents and Advisors and 20 training courses available.

2026 Highlights: Olympic Tactical & Investigations LLC is available 24/7/365 with rapid response capability for crisis management, last-minute requests, and incident response cooperation. "

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License #1787

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Rain City Investigations, LLC - Seattle, WA Private Investigation Service - Company Logo
8+ YEARS IN TBR
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RAIN CITY INVESTIGATIONS, LLC

PO Box 78141,
Seattle, WA 98178

Since 2015

Specialty:

Background Investigations Maritime and Fisheries Investigations Personal Injury and Insurance Claims Corporate Investigations Locates

" Rain City Investigations, LLC provides specialized, high-end investigative services to clients, focused on giving you the best possible information and closure for your unique needs. They serve individuals, organizations, and businesses of all sizes. The company has over 20 years of investigative education, training, and experience. Rain City Investigations, LLC, is committed to delivering exceptional investigative services customized to meet your requirements. They provide investigations into employee misconduct, fraud, or intellectual property theft. They have obtained a contract to conduct federal background investigations on behalf of five federal law enforcement and intelligence agencies. These investigations are in service to the community, ensuring that quality public servants are employed in the government.

2026 Highlights: Rain City Investigations, LLC is a Service Disabled Veteran-Owned small business serving the greater Seattle area, including the metro Eastside and south King County. "

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License #4090

Contact:

(206) 330-1998

Open 24 Hours

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Washington State Investigators - Seattle, WA Private Investigation Service - Company Logo
8+ YEARS IN TBR
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WASHINGTON STATE INVESTIGATORS

Seattle & Surrounding Areas,
Seattle, WA 98104

Since 2012

Specialty:

Investigation of Missing Persons Personal Injury Investigation Child Custody Child Abuse Investigations Domestic Surveillance Workers Compensation Background Checks Marital Investigations Asset Searches

" Washington State Investigators is dedicated to supporting individuals and businesses with an affordable means to the information and investigation services they require. The company was founded by Wolfgang Grasst. They provide their clients with specialized services resulting in high-quality investigative solutions. They understand which resources are required to solve problems and answer questions, reducing time and effort and saving their clients money. Washington State Investigators provides their clients with additional layers of protection by securing their case information behind firewall hardware and software, using an encrypted secure email provider and encrypted data storage. They believe that the combination of Information Technology, Cyber Security, and Private Investigation allows them to provide their clients with the best opportunity to produce quality results during their investigations.

2026 Highlights: Washington State Investigators provides professional investigative support built to expose weaknesses and clarify disputed facts about your case. "

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Small Business Excellence Award 2020
License #4287

Price:

Hourly Investigations $95 - $350
Flat-Rate Research Services $195 - $2,500

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