North American Investigations (pvteyes.com) has a 4.8 out of 5 rating on OK.one, based on 61 user reviews collected here. It is listed under Legal Services & Government and its reputation is excellent. Praise is nearly unanimous, with 94% rating it 4 stars or higher; The business has replied to 100% of negative reviews. Last updated 2026-08-10.
What people say
A
Anonymous · 1 review · Verified ·
★★★★★
NAI and Darren Giglio were amazing!
Working with NAI was a great experience. I had never used this type of service before and I was nervous about how to proceed. Darren Giglio, my PI, was excellent. He explained everything in great detail and went above and beyond to help me with my complicated situation. I would definitely recommend Darrin and would work with him again in the future!
Reply from North American Investigations2016-09-19
S,
I can tell you that this case was indeed a roll-a-coster, it was exciting and glad we got on board. I am glad it turned out the way it did and we were able to help. We wish you the best!
Thank you!
Darrin
J
Jesse · 1 review · Verified ·
★★★★★
Could not have ask for better!
I contacted Darrin late in the week for services beginning the following Monday. He was able to get a team together on short notice. Information collected was wonderful, detailed and professional. Darrin also contacted me daily to give me updates which put my mind at ease.
Reply from North American Investigations2016-09-08
Jesse,
Thank you so much for the review. I am glad my team was able to get you the necessary evidence for your custody case. I wish you the best of luck. It was a pleasure to have you as a client.
Best,
Darrin
T
Tom · 1 review · Verified ·
★★★★★
NAI and Darrin Giglio - Outstanding in every respect!
I have been working with Darrin Giglio and the NAI investigative team for over two years on a number of challenging and complex investigative situations. Without exception, Darrin and team have responded to my needs with expertise, sensitivity, integrity, and flexibility. I endorse the quality of their work without qualification,
Reply from North American Investigations2016-09-08
Tom,
We have been through a lot together with this investigation. I appreciate the review. You a gentleman and a pleasure to deal with. I only wish you the best.
Thank you again.
Darrin
A
AB · 1 review ·
★★★★★
Great company to work with
Darrin and his firm are professional and hardworking, and they care about clients and our needs. I would highly recommend North American Investigations
Thank you for helping me NAI
AB
Reply from North American Investigations2016-09-08
Thank you for the review it is very much appreciated.
Best,
Darrin
L
Lisa · 1 review · Verified ·
★★★★★
Great experience
I would highly recommend North American Investigations. The staff was wonderful, very discreet and professional. The investigation that they helped me with was done in a very timely manner.
f
fp · 1 review · Verified ·
★★★★★
Instagram Case
Service delivered was top notch quality. Investigators were very easy to speak with and resolved my case in a very efficient and timely manner. Highly recommend them for any person needing services of a private investigator,
J
Jeff · 1 review · Verified ·
★★★★★
Top Notch PI - Amazing service and professionalism
Darrin and his staff at North American Investigations are amazing. I could not recommend them any higher if I tried. They are professional, diligent and excellent at what they do and are hired for. I have used them twice and each time is better. The investigators and staff are wonderful and they send a very detailed report after each job. Each person I have dealt with has been so easy to work with and they take pride in what they do. Do yourself a favor and don't look any further than Darren and North American Investigations. You will be completely satisfied with the job and then some!
Reply from North American Investigations2016-09-08
Jeff,
Thank you so much for the kind words! I am very happy to have clients that are satisfied. We try our best.
Best,
Darrin
J
JP · 1 review · Verified ·
★★★★★
Professional, dedicated, supportive, honest.
I never thought I would run into a situation where I would need the help of private investigators. I was nervous, scared and didn't know what to expect. Darrin, Mike and the rest of his team were supportive beyond belief. They helped me in a situation where I felt lost and was taken advantage of in a traumatic manner. I've never been in any sort of trouble whatsoever, and I think I would have crumbled without their support. They were up front about estimated time and fees. They were empathetic, but realistic which allowed me to make better choices. Darrin runs a business, but he also believes in truth. That's very rare in the system that surround us. Day or night he did the best he could to listen and decide on the most intelligent move to protect my interests, and more so to protect the truth. I will always remember him and know exactly who to call should I need assistance.
Reply from North American Investigations2016-07-06
JP,
Myself and the team appreciate your words. We all understand the horrible situation you are in and really are here to help. We go your back! and will always pursue the truth.
Best,
Darrin
A
Annonymous · 2 reviews · Verified ·
★★★★★
Quality Service, always available, Great Results
Professional help available basically available 24/7, They communicate clearly the objective, works to change and mold the process as the case developed. I would not trust anyone else to handle my file. You will not regret using this company for your needs. A++ in service and Quality.
Reply from North American Investigations2016-07-06
J,
Thank you for the review. I wish you all the best and we are here if you ever need us.
Best,
Darrin
K
Kevin · 1 review · Verified ·
★★★★★
Darrin gets it done
I had a difficult task with few leads to go on. Darrin was confident he could find a result as he had similar prior experiences. Darrin delivered ahead of time and his fee was very reasonable. I highly recommend.
K
Kim · 1 review · Verified ·
★★★★★
Outstanding North American Investigations
This company is extremely profession. This was my first time ever using this type of organization to help me with a personal matter. I have never felt so comfortable working one on one with an owner of a company. I am not sure if I should mention his name, however, you will get to know him. Each and every time I called I was able to reach the owner personally. He answered all my questions. Trust me, I called a great deal! He was very professional and even consulted me regarding my situation. I needed someone to advise me and at times calm me down regarding the circumstances. With the information I received I was able to make an appropriate decision for myself. I recommend this company and I will be using North American Investigations again myself if need be, as well as make recommendations to friends/family.
Reply from North American Investigations2016-07-06
Kim,
Thank you very much for the review. We really do appreciate when client's take the time to share their experiences working with us. It was a pleasure to work with you although I wish it was under better circumstances for you. I truly wish only the best for you.
Best,
Darrin
S
Sam · 1 review · Verified ·
★★★★★
Photographic survalence
When I first hired NAI to get pictures
Of my alleged daughter I was a nervous
Wreck. Would I get a call from my
Ex saying there were suspicious looking
Men outside her house with cameras.
I learned immediately however to
Relax Darrin and his team of private
Investigators are extremely professional
And more important extremely discrete
They also do great work
I wholeheartedly recommend them
Sam
C
Chris · 1 review · Verified ·
★★★★★
NAI professionals are top notch when it comes to getting you need.
From the very first phone call to NAI, I knew I was dealing with professionals who could help me get the information I was seeking. I suspected that my spouse was cheating on me for about 6 months. The process was clearly explained to me by the detectives. They were available to me whenever I had a question or wanted an update. The final report was detailed, informative and ultimately confirmed my suspicions. Best of all, I had my answers in about a week and a half! If you suspect that your spouse is having an extramarital affair, I recommend, without hesitation, calling NAI.
T
Thomas Burke · 1 review ·
★★★★★
Long Lost Friend
I called a few agencies prior to contacting Darrin but just a few moments after speaking with him on the phone I realized I had contacted the right agency. I was extremely pleased with Darrin, his continued contact with me with updates and the honesty with which he told me what he could do. For those that served in our nations military we all know that traveling around we lose contact with our shipmates that we may have been stationed with or those civilians that we may have met in the outlaying areas. With very little information, just a name and last known town lived in, Darrin was able to locate a dear friend that I'd lost contact with for 25 years. I couldn't believe that Darrin had found my friend in such a short period of time. I would strongly encourage anyone to contact Darrin if you had someone in your life that meant so much to you but again with distance and time we can lose contact. I don't believe that I can honestly convey with simple words the sense I experienced when I saw the photo of my friend after not seeing them for so many years. I would also like to add that Darrin, once knowing I served in our military, was very gracious in providing me with a substantial discount off the normal rate. I would gladly use Darrin's service again in the future and I truly believe it was money well spent.
D
Diana · 2 reviews ·
★★★★★
Accomplished
Darrin, was very friendly & answered my calls during all times / weekends as well. He contacted me the following day in regards what they had discovered about my "mystery guy "R". Thanks.
Reply from North American Investigations2016-05-04
Thank you Diana, I am glad we could uncover the info you needed. Best of luck to you.
Darrin
S
Steve S. · 1 review · Verified ·
★★★★★
This firm is top notch !
Darrin and his firm are extremely professional, courteous, hardworking, and punctual. They make sure to get the job done and make sure that you feel confident in their hands. I would definitely recommend him and his firm to anyone looking to get the results they're looking for .
Reply from North American Investigations2016-05-04
Steve,
Thank you for the review and recommendation. We appreciate clients taking the time to share their experience working with us. I wish you all the best with your situation.
Best,
Darrin
L
Laura · 1 review · Verified ·
★★★★★
Amazing Investigators
I was being stalked and harassed by someone online and felt that I had no options. I had one conversation with Darrin and knew that I was in good, dependable hands to help me with this matter. Not only did he verify the persons information so I was able to go to the authorities but he has also called to check in with me to make sure that I am safe and ok. Darrin went above and beyond for my family and I and I would highly recommend him to anyone in need of PI services. He is professional, caring, and understanding and can be trusted with whatever your needs may be.
Reply from North American Investigations2016-05-04
Laura,
Thank you for the review and your kind words. I am glad you felt like we were there for you and I indeed was concerned because stalking is a serious matter. I wish you all the best.
Be safe!
Darrin
M
Matt · 1 review · Verified ·
★★★★★
Outstanding Expierence
I met with Darrin on a Monday afternoon. Almost to my disbelief, 24 hours later he called with all the information I needed. Great working with him. Will absolutely use his services in the future.
Reply from North American Investigations2016-05-04
Matt,
Thank you for the review. It was great working with you as well. Please let me know if we could assist you in the future.
Best,
Darrin
J
Jamel · 1 review · Verified ·
★★★★★
Perfect Service
Hi this company gives perfect service. Making you feel like your there number one priority. Thsnks alot Darrin for the good work.
Reply from North American Investigations2016-05-04
Jamel, it was a pleasure working with you and we appreciate the review.
Best,
Darrin
N
Noel · 1 review · Verified ·
★★★★★
Quick and confidential
I was concerned about a friend I wasn't able to contact and NAI got me information on the same day I requested it. Couldn't have been more straightforward.
Reply from North American Investigations2016-05-04
Noel,
Thank you for the review. We appreciate it.
Best,
Darrin
