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Mercer Island Investigators

Browse these investigators with great ratings from Thumbtack customers in Mercer Island.

Cocidius Solutions
from 9 reviews
  • 6 years in business
  • 15 hires on Thumbtack
Christine H.
Verified review

I am impressed with Eric and Mikey. This is my first experience with private investigators, but so far they have met all my expectations. I would recommend them in a heartbeat as they are professionals and care about people.

  • 3 years in business
  • 17 hires on Thumbtack
Puttaraporn K.
Verified review

I originally hired one security guard to escort my mom to retrieve her belongings since there were no civil standby available, but he offered to bring an extra guard at NO EXTRA CHARGE just to be more safe. Dave and Trent were very nice, professional, helpful, know what they were doing, fast, and they even gave me details and answered any questions promptly. The communication was very effective. Will definitely use their services again! The rate was very reasonable. Hire them and you won't be disappointed!

  • 8 years in business
  • 19 hires on Thumbtack
Carlos G.
Verified review

I needed a process server and I am glad I went with Justin. The address my defendant gave to the police was incorrect and he tracked her down to her real address. Thanks to him, I was able to win my suit and recover all that was owed to me!

  • 15 years in business
  • 6 hires on Thumbtack
Kim K.
Verified review

Mr. Jason Earls did an outstanding job of providing security at our HOA meeting on March 9, 2014. He was very professional; prompts; courteous; dressed well; perceptive; a great listener and obviously has had much experience in dealing with difficult personalities. He assured our physical safety and told us it was his number one priority. The meeting last an hour and a half and his full attention was present the entire time. Plus, his feedback on his observations of the meeting were invaluable to us. We would hire him in a heartbeat if need be. Thank you.

E. B Hill & Associates, LLC
from 3 reviews
  • 26 years in business
  • 7 hires on Thumbtack
Luana K.
Verified review

⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️ Is there a ten star option?🌟 because that's what he is, he is above and beyond what you expect. What can I say here except that my expectations were blown right out of the water he was that good. He came out to meet me within an hour of me calling and consulting over the phone. During our in person talk we discussed the situation and he listen to me for about an hour possibly longer in relation to everything that was going on. he would not even discuss price and he had told me that he wanted to make sure that he could help me before he charges anything. Someone that honest that quality driven is RARE,🌹extremely rare. By the time I was done filling him in on everything he stated that he thought at this point it would be better to go and alternate route because he felt that at this point it would be more price effective for my particular situation to focus on the free things I can do rather than jumping into paying for services but he said that if I don't feel comfortable with that he can absolutely move forward and start right away. I was wanting to cry I was so happy talking to someone who actually cared about my situation and was giving me advice based on my best interest I can't tell you how much that meant to me. If that wasn't already amazing which it is he then stated that there is a certain course of actions that he thought would be effective he gave me a detailed step-by-step of what I should do and he also offered to help me facilitate that procedure that he was recommending. I left the meeting feeling refreshed and feeling that I was able to see it from a more level view as it wasn't being distorted from my emotional status. Honestly he could also make a great psychiatrist LOL!! He is very low pressure and makes you feel at a ease during a time you probably don't feel so well and honestly that was very significant for me. In terms of his background he has a very impressive background in law enforcement! Also the rate he quoted me was extremely fair, I honestly think he should charge more for his services. I will not hesitate to call him again when I need PI help, thank you again, you don't know how much it meant to me! I finally felt like I had control back again I don't know what I would have done without his help 😊Sincerely Lala

Ernest Sanne Investigations
from 2 reviews
  • 3 years in business
Cheryl E.
Verified review

I hired Ernest Sanne and was very pleased with the professional way he handled my case and impressed with his knowledge of the law. He worked hard on my case, always kept me up-to-date, was easy to work with, and compared to other investigation companies his price is affordable. Cheryl E. - Carson City, NV

  • 2 hires on Thumbtack
Nikki R.
Verified review

Verified my suspicions that my husband was cheating. Would definately use again.

EK Investigations
from 1 review
  • 1 hire on Thumbtack
Carl F.
Verified review

Quick to respond and excellent attention to detail. Flawless service and made me feel comfy that I wasn't just wasting my money. Will use again and refer to others.

FR Investigations, PLLC
from 1 review
  • 19 years in business
  • 2 hires on Thumbtack

Work with one of the best process server in the northwest. We specialize in hard serves. Our agency has the resources to get the job done. We are private investigators, and can also locate most individuals and companies. As private investigators we specialize in Domestic, Custodial and Surveillance. Our surveillance team provides answers to the most complex urban, suburban and rural situation. Experienced surveillance personnel with hundreds of successful case files.


It's simple. We focus our efforts on the end result. Customer satisfaction, problem resolution and piece of mind. We specialize in the following areas: - Spousal / marital Infidelity. - Perform undercover operations such as evaluating the performance and honesty of employees by posing as customers or employees. - Question persons to obtain evidence for cases of divorce, child custody, or missing persons, or information about individuals' character or financial status. - Write reports and case summaries to document investigations. - Alert appropriate personnel to suspects' locations. - Background, Surveillance Professional Investigation Services. - Detect occurrences of unlawful acts or infractions of rules in private establishment, or seek, examine, and compile information for client.

  • 4 years in business

I stand out mainly on price and acknowledging the human aspect of investigation.


I am a licensed private investigator in Washington State. My license number is 3418. I have also been a professional librarian for 37 years. My services include background checking, court research, database research, internet research, locates, missing persons.


Experience, professionalism, and competency in the Civil Rules of Procedure, and the applicable sections of the Revised Code of Washington. Also, "We put the Proof, in the Proof of Service!" No other agency or process server, offers photogrpahic evidence, video evidence, and GPS evidence, to ensure that your Proof of Service is as bullet proof as possible. We've never been sanctioned, never been sued, and we've never had a serve over-turned.


We are very experienced and dedicated to serving our clients with professionalism, tenacity, and integrity. We will get you the results you need.


Camandago is the best when it comes to finding facts and analyzing information about legal, financial, and personal matters. Our service includes the following: * Verifying people's backgrounds * Finding missing persons * Conducting surveillance * Tracking * Verifying employments * Investigating computer crimes and information theft


Since 2008, the University Place office of Liston Investigative Services has established contacts and enlisted intelligence sources nationwide, building investigative capabilities focused on litigation support services for law firms, buisnesses of all sizes, and private clients. These capabilities include the investigtative areas of workers compensation, child custody family law, employee termination, pre-hire executive screening, post judgment assset profiles, collections intelligence, pre-litigation defendant evaluations and asset tracking. The goal of every investigation is to quickly and efficiently bring all available facts and evidence to you in the most useful format possible. Liston Investigative Services routinely perform evidence collection and legal research to support your family law litigation for: •Child Custody •Child Support Modification •Financial Support -Employment Verification •Parenting Plans Child safety / Visitation monitoring / Prohibited persons in the partner's home; Surveillance is imposed in the instance of parental visitation to determine whether the parent is associating with prohibited persons by violating no-contact orders, failing to provide a safe environment for your children on visits, or acting in a manner inconsistent with court orders.


Over 20 years of investigation experience, no job is too little. Private discreet and friendly. We can cover all of your needs from background and employment checks to Executive protection, Skip Tracing, Adultery and marital Infidelity...


Our professional private investigative firm services include the following: legal, fraud, covert, insurance, runaways, etc.


I offer the following services: * Locate persons * Internet research * Personal investigation requests * Personal shopper * Infiltrate business to determine integrity of staff * Plus much more upon request


I specialize in information, wherever it comes from. I help people find out what they need to know about other people.

  • 3 years in business

Argia Investigations is a Private Investigation & Analysis Agency dedicated to assisting our clients through diligent, thorough, discreet, ethical, and compassionate means. We are committed to our clients, ensuring that they are updated through each step of their case or issue. Most importantly, we love what we do, meaning we will do everything we can to get your questions answered and get you some peace of mind. With years of law enforcement and investigative analysis experience, we can adapt to any situation, and investigate & analyze both criminal and civil cases including missing persons, fraud, skip-trace, domestic investigations, surveillance, background checks, due-diligence, adoption/reunification, phone record mapping and analysis, legal services, and much more. We can adapt to your unique situation and provide you with the best solution for your needs and budget. We are also fluent in Spanish, and can provide some services in French, and we have direct 24/7 access to interpretation and translation services for almost any language. Consult with us to learn more about the creative, efficient, and cost-effective ways we can help you get the information, Intelligence, security, and peace of mind you are looking for...we look forward to talking with you!

Q & A

Answers to commonly asked questions from the experts on Thumbtack.

What does a private investigator do?

First and foremost, good private investigators follow laws. Unlike on TV, they don’t break in windows or hack into hospital computer systems to get you intel. When you hire a private investigator, you’re hiring a professional to gather facts and find information for you. Although they can’t obtain certain information (such as health records), they do have access to information that most civilians do not. Often private investigators are hired to perform surveillance or background checks or investigate cases such as adultery, child custody, missing persons, hidden assets, or debugging, and theft or other crimes.

Private investigators can be hired to interview people and provide that information to the client, perform photo or video surveillance, monitor activity at a location where you suspect criminal activities or questionable behavior, track a person’s movements, find missing people, do deep-dive background checks, and more. Private investigation can be helpful if you’re trying to get a court order but need evidence. Private investigators can also help find birth parents. Nationally, the average price range for private investigation is $70-$210 per hour.

What does a private investigator cost?

Private investigation isn’t just for blockbuster action movies. Hiring a private investigator can help in all kinds of situations ranging from finding a birth parent to improving personal security. Nationally, the average price range for private investigation is $70-$210, although pricing often hovers between $40 and $100 depending on the complexity of the services you need. Where you live in the country will affect your costs for private investigation; larger cities have higher business overhead and a higher cost of living, which in turn means higher service rates. The complexity of your case can also affect cost. A basic background check may have a flat rate, while hiring a private investigator to help with your child custody case may require more legwork and research, and therefore cost more. Some private investigators work on retainer. A retainer is essentially a nonrefundable deposit you pay to the professional — meaning you have retained their services — who then works against that amount. Here are some examples of average private investigation costs:

  • Hourly rate: $60-$70; costs can vary based on current fuel prices.
  • Flat rate: $100 for comprehensive background investigation services.
  • Retainer: $1,500 minimum retainer required by some pros before starting work.

Actual Requests

See other requests for investigators in Mercer Island

Need a Private Investigator

Seattle, WA

  • Case type
    Missing person(s)
  • Details
    My mother went to arkansas and is now missing
  • $1190
    Average price
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