Ontario, CA
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Ontario Private Investigators

Browse these private investigators with great ratings from Thumbtack customers in Ontario.

Luis Orellana Investigations
4.4
from 25 reviews
  • 12 years in business
  • 74 hires on Thumbtack
Ennio F.
Verified review

He is very good at what he does and I recommend anyone to him who needs Private Investigative work!

  • 6 years in business
  • 38 hires on Thumbtack
Li J.
Verified review

All communications from APG were immediate, clear and professional -- this was very reassuring. The security guard assigned to man the door for our private party came on time, and was very nice.

  • 7 years in business
  • 19 hires on Thumbtack
Sydni T.
Verified review

John got into contact with me immediately and performed great, accurate service and was very friendly, professional, and helpful. Highly recommend him as a private investigative resource that is cost effective.

La Paz Research Group
4.6
from 14 reviews
  • 22 years in business
  • 20 hires on Thumbtack
Sonia R.
Verified review

I called La Paz to have them do some surveillance. Once I explained why and what I wanted, they told me they could interview the people instead of costly surveillance. The investigator sent me a report that had the information I needed. I'm glad I had La Paz Research Group help me. That was money well spent.

National Intelligence Group
4.0
from 20 reviews
  • 19 years in business
  • 22 hires on Thumbtack
Chris L.
Verified review

I was iffy about hiring a private investigator! Mr. Allen walked me through everything and was very professional and helpful. He knew what he was talking about how I should go about everything.. he's the guy you wanna hire hands down :)

  • 12 years in business
  • 6 hires on Thumbtack
Nicole R.
Verified review

Words cannot express how amazing the experience was with Rod and the Investigators at investigations by Retired Cops was. It took a long time to get the courage to make the call, but I now wish I had done it sooner. For years I felt my husband may be cheating but I truly wasn't sure. I was embarrassed and scared. I made the call without knowing what to expect but right away they made me feel comfortable and walked me through the process. Knowing what a stressful situation this was they answered my questions, supported my need for confidentiality and discreetness and communicated with me throughout the entire process. If anyone is ever forced to face a bad situation such as mine I hope that they are wise enough to use Investigatins by Retired Cops. They are professional and knowledgeable. I recommend them to anyone in need and appreciate their ability to help me move forward in my life in a positive way. Excellent Company!

  • 23 years in business
  • 4 hires on Thumbtack
Griselda B.
Verified review

Moises, was very helpful, he delivered what was promised. He wasn’t pushy. Very professional.

Linked Investigations
5.0
from 1 review
  • New on Thumbtack
Karl G.
Verified review

I have used Linked Investigations for years. I had an incident with an employee in the past that taught me a valuable lesson. I now screen all potential employees. I provide Mike with basic information like a name, SSN if I have it, and an address or phone number and he can find a surprising amount of information on a person, for example, any criminal past or credit issues. The reports are thorough, timely, and worth it. I recommend him to any employer or anyone needing a background check.

  • 5 years in business
  • 2 hires on Thumbtack
About

I go the extra mile for you. I am a passionate investigator.

About

I am a licensed private investigator. I do insurance fraud, civil case works, and background checks. I will travel to any location in California.

  • 34 years in business
  • New on Thumbtack
About

Garrett & Associates has spent many years prior to licensing in the 1980's learning & honing our PI skills from "old school" professional described as true "gumshoes". Think of Los Angeles, 1940's Mickey Spillane-type investigators that hit the streets for real & accurate information right from the source...not a computer or stale databases...you get the picture. We have old as well as new resources developing daily and apply these to every investigation conducted in a confidential manner. It can get no better

  • New on Thumbtack
About

I became a fully licensed private investigator to help people and businesses to find solutions to their legal matters. I have been in the business for over 20 years and am located in the Inland Empire. However, don't let that stop you from calling if you are in a different area. I would like the opportunity to be of service.

  • 17 years in business
  • New on Thumbtack
About

We are a full-service private investigators, and we do everything from background investigations, to litigation support, to surveillance. Whatever your needs are, we can help. We offer services in Los Angeles, California.

  • New on Thumbtack
About

We have eyes everywhere. We can see what you cannot. We will do what you will not. We get you the answers you need and deserve.

About

Only the best qualified professionals used. Not the cheapest...the best! Get the results you need.

  • New on Thumbtack
About

Private investigative services for adultery, divorce and insurance fraud provided. I offer fast and direct results. Call, text or email me today!

About

We provide threat assessment and strategy in personal and environmental security. We also provide counter-stalking counseling and mediation.

About

Best Tracers P.I. is a State of California licensed private investigation agency. We provide many services for attorneys, businesses, and private parties. Our staff has been successfully serving in the Los Angeles, Orange, Riverside, San Bernardino and San Diego counties for over a decade.

  • 24 years in business
  • New on Thumbtack
About

We do investigations for the following: * loss prevention * surveillance * employee theft * covert cameras * mystery shopping * loss prevention program * external theft prevention * organized retail crimes * management training * auditing compliance * polygraph examination * background investigations * hospitality * surveillance cameras * integrity shops * criminal investigations * civil investigations * insurance investigations * executive protection * corporate investigations * service of process * attorney Services * spouse investigations * missing person/skip tracing

  • New on Thumbtack
About

I provide all areas of investigative services, specializing in criminal defense, as well as in areas of worker's compensation, background checks, insurance and domestic surveillance. I do asset checks (including bank accounts) and criminal and civil background checks.

  • New on Thumbtack
About

I am a private investigator and defense criminal investigator. I have the most up-to-date equipment, own several vehicles, have been working for several attorneys and fellow investigators. I offer free consultation.

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