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Allstate Private Investigations
“Todd was very easy to work with and was able to do the job in a fast and very reliable way.”
Best Private Investigators near Simi Valley, CA
2 of these agencies are based in Simi Valley; the others serve Simi Valley from towns including Woodland Hills (11 mi), Westlake Village (10 mi) and Agoura Hills (8 mi).
10 open 24/7 · 20 open weekends · 21 rated 4.5+ · 11 show a license
Data verified October 18, 2026
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A1 Small Claims
“I trust him completely and will MOST DEFINITELY use his services in the future!”
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Security Guard Solutions
- Team
- Individuals
- Management
“I was in urgent need for a reliable, responsible,and trustworthy team of security guards this past Week, i called around a couple of security company's who had great reviews about their prices being low but that def was Not the case!”
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Assertive Security Guard Private Patrol Services Los Angeles
- Team
- Property
- Company
“Maryam has worked with us from day one to ensure that our changing needs have not only been met but exceeded as her experience allows her to anticipate future requirements.”
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Wolfe's Investigations
- Team
- Custody
- Review
“I hired Brian very last minute, I called him in the middle of the night and he just happened to be available and was able to get somebody working on my case within a couple of hours.”
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Corporate Security Investigations
- Court
- Job
- Money
“He came to my house immediately, spoke to several people, did a data base search and then went to the house where he believed she was located.”
The 24 agencies on this page are the private investigators listed for Simi Valley, 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: Simi Valley, CA
23 of the 24 agencies on this page have a rating, from 4.0 to 5.0 across 229 reviews; 2 have 50 or more reviews and 21 are rated 4.5 or higher. When clients rate these agencies on specific qualities, they most often praise professionalism (91%), responsiveness (87%) and quality (74%). 10 are open around the clock; 18 are open on Saturdays and 19 on Sundays. 11 show a license on their websites and 2 have a BBB rating of A or A+. 18 have ten or more years of experience, the longest 33 years. 10 offer urgent consultations; 7 offer a free initial consultation and 1 is family- or locally-owned. We have a website on file for all 24 of the agencies on this page; 20 publish a contact page and 17 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 Simi Valley shown here?
2 of the 24 agencies have an address in Simi Valley. 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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J R Investigations
“The team has done swift and thorough background investigations on too-good-to-be-true online dating scammers; served witnesses who had been trying to hide; found assets of defendants who were pleading poverty; and most recently helped a distraught da...”
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ATI Investigations
“In my need for an investigator to handle a matter for me, in choosing ATI invesgations made the process very comfortable .”
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Quest National Security
- Company
- Property
“I had great experience working with Quest National security in our location and in several events we had this year before all the closures happened, they are proffesional prompt , reliable and communicate with you at all times.”
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Endeavor Group
“Endeavor group is a quality investigator branch with top-tier Investigators.”
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Diva Detective Investigations
“I recently had the pleasure of working with Diva Detective Investigations, and I wanted to take a moment to express my appreciation for their outstanding service.”
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Blue Knight Global
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L A Detctives
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Elliott Investigative Services
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Doerner Investigations & K9 Detection
- Dogs
“She was professional but also incredibly kind and very sensitive to the issues my family was dealing with.”
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USA Express Legal & Investigative Services
- Phone
- Company
“I need a legal and investigative service that is competitively priced and tailors to the needs of the law firm, and they go above and beyond my requirements.”
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Aenigma Investigation Agency
“Close attention to the small details of my case made the difference”
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Glucroft Investigations
“Glucroft took the time to explain to me how to recover my money, I tried to pay him for his advice and time and he declined and stated that "if he could help, he would".”
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Private Protective Services
“Great company to work with!”
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Blackbird Investigations
“I highly recommend using Blackbird Investigations.”
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Hover View Investigations
“MUCH better than Super Eye Investigations and Private Investigators of Encino .”
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LJ Proprieties Private Investigations
“I feel so safe knowing he is only a phone call away and can be there within minutes if I'm in trouble.”
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Coastline Detectives
“I hired Coastline Detectives on many occasions over the years for difficult witness statements, background investigations, surveillance, and service of process.”
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Executive Investigation & Protection Agency
“She asked me to send her all the information, pictures, anything regarding my case that may be of interest and she said she would read it all that night.”
Private Detective Services in Simi Valley, CA Cost Estimates
Minimum cost
$357
Maximum cost
$11303
National Average
$1428
Avg Per Hour Rates
$149
$833
$2380
Average price range is based on 353 cost profiles
Why these companies made our list
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