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Pyrocop
“Called for sprinkler products, which they don't sell, but unlike most other places I called, he used his expertise answering a few questions and helped me find them.”
Best Private Investigators near Rancho Cucamonga, CA
3 of these agencies are based in Rancho Cucamonga; the others serve Rancho Cucamonga from towns including Riverside (16 mi), Upland (5 mi) and Fontana (6 mi).
1 open 24/7 · 11 open weekends · 17 rated 4.5+ · 6 show a license
Data verified October 18, 2026
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XPD Investigations
“XPD Investigations conducts background checks of applicants for the positions of Police Officer, Deputy Sheriff, Firefighter, Private Security, Dispatcher, as well as Civilian positions within Southern California.”
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Streamline Investigations
“Find out how an insurance fraud investigation is conducted and learn about types of insurance fraud, including car, health, home, life, insurance company, and workers compensation fraud.”
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Clete Security Services, Esq.
- Company
- Patrols
“Indeed, it worked: The bad person figured immediately that this calm and soft-spoken man was NOT to be trifled with, and the usual belligerence was instantly replaced with polite and courteous behavior!”
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Bosco Legal Services
- Asset
- Company
- Job
“After our lousy attorney refused to provide and file necessary paperwork with the court after he was paid his legal fees, Our estate was left unrepresented.”
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Tag Force Security & Patrol Services
“This company is so great the supervisor is someone who will do the most for you and asks for a tiny return just show up and do your job I am so greatful and so blessed to be there thank you Tagforce”
The 24 agencies on this page are the private investigators listed for Rancho Cucamonga, CA. What each one states about its license, its specialties and the areas it covers comes from its own website; ratings and quotes come from public reviews.
Area overview: Rancho Cucamonga, CA
21 of the 24 agencies on this page have a rating, from 3.8 to 5.0 across 269 reviews; 1 has 50 or more reviews and 17 are rated 4.5 or higher. 1 is open around the clock; 11 are open on Saturdays and 5 on Sundays. 6 show a license on their websites and 4 have a BBB rating of A or A+. 13 have ten or more years of experience, the longest 62 years. 1 offers urgent consultations; 1 offers remote or virtual consultations; 6 offer a free initial consultation; 2 are family- or locally-owned and 1 lists coupons or special offers. We have a website on file for 21 of the agencies on this page; 14 publish a contact page and 9 list a public email. We count these figures across the agencies on this page; distances are straight-line, and hours and prices change, so confirm the details with the agency before you book.
Why are investigation agencies outside Rancho Cucamonga shown here?
3 of the 24 agencies have an address in Rancho Cucamonga. The others come from other towns. Investigators travel to the subject, so an office one county over is rarely the issue. State licensing is the thing to check.
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RJN Investigations
“Extremely knowledgeable, pointed me in the right direction.”
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Ci&s Investigations
“The results were beyond expected and due to the diligence and investigative methods of CIS investigation firm I was able to present the findings to the court in my favor winning me sole custody of my child.”
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Blumenthal & Moore
- Life
- Lie
- Trial
“Blumenthal Law came highly recommended to us when we were seeking legal counsel that could expertly, efficiently and tenaciously represent us in a very complicated case.”
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Stone Investigation Services
“He can think outside the box, but also capable of patience meticulous investigation.”
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PAX Investigations
- Team
- Attention
“I have utilized their services on multiple occasions and each time I have been throughly impressed with the professionalism and attention to detail their team has brought.”
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Inland Professional Investigations
“Very happy with how Inland Professional Investigations handled my background investigation.”
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Fugitive Recovery Agent
“No fuss”
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Smarthire
“Back ground checks and private investigating”
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Integrity Legal Support Services
- Documents
“If the clerk rejects the filing, Trent will call our firm, let us know whats wrong, and stay until were able to fix that problem so we can meet our deadline.”
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Joe Mar Polygraph & Investigation Services
“And Highly recommended to Anyone that needs Accurate Results.”
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Cobalt Consulting and Investigations
“Our Investigators expertise include; Anti-piracy, Computer Forensics, Corporate Investigations, Employment Backgrounds, Litigation Support Services & Strategies, Threat Assessment, Executive Protection, Work Place Violence, Workers Compensation Inves...”
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Ron Farris Investigations
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Gonzalez Exclusive Invstgtv
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Kurk Investigative Group
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Peterson Investigations
- Feel
- Job
- Security
“The answer to that question as it relates to Peterson Investigations is not only an emphatic "yes, I would," but also a deeply grateful "yes, I already have and will continue to do so without the slightest hesitation!”
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Brapga Security Systems
- Homeless
- Company
- Thanks to Them
“I called a few days ago and spoke with Santos, he gave me good information, he was interested in an event service, he explained its security structure very well and finally we reached an agreement, the day of the event arrived and I was satisfied.”
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Lockjaw Legal Process Services
- Company
“Very kind and helpful over the phone considering the situation.”
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Excaliber Investigations
“Reliable, trustworthy and highly recommended investigated service.”
Private Detective Services in Rancho Cucamonga, CA Cost Estimates
Minimum cost
$363
Maximum cost
$11493
National Average
$1452
Avg Per Hour Rates
$152
$847
$2420
Typical price range is based on 258 cost profiles
Why these companies made our list
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