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The 5 Best Private Investigators in Philadelphia for Discreet Support

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We extensively test and research all services we review. Here's why you can trust us.

Experience and Background: We looked closely at the professional background of each investigative team to make sure they have real-world expertise. Agencies with former law enforcement or military personnel stood out because of their practical training.

Service Range and Specialization: It was important to see whether each agency could handle a wide variety of cases or had a strong niche. We prioritized teams that offer useful support for personal, legal, and corporate needs.

Technology and Reporting: Clear, actionable evidence is a non-negotiable part of a good investigation. We favored companies that use reliable surveillance tools, digital forensics, and organized reports that clients can actually use.

Discretion and Professionalism: Sensitive matters require a high level of confidentiality and tact. We paid attention to how each firm approaches privacy, communication, and case handling from the first contact onward.

Finding yourself in a situation that requires a private investigator (PI) can feel incredibly daunting. Are you dealing with a complex family issue, trying to gather evidence, or handling a business concern that needs discreet proof?

Well, I know how stressful it is to navigate this space when privacy matters and the stakes feel high.

To make the search easier, I reviewed local agencies with strong experience, clear reporting, and professional discretion. If you’re looking for the best private investigators in Philadelphia, these are the teams worth considering first!

How much does hiring private investigators cost in Philadelphia?

Private investigators in Philadelphia typically charge an average hourly rate of $100 to $150, though total case costs can vary significantly depending on the complexity of the investigation.

Service TypeEstimated Cost
Hourly Rates$50 – $200+
Standard Hourly Work$50 – $150
Complex Surveillance (Hourly)$125 – $200
Retainers$500 – $5,000
Typical Case Total$750 – $3,500
Daily Surveillance$1,500 – $3,000+
Flat Fees (Background checks, etc.)$100 – $1,500

1. Tri State Detective Agency

tri-state-detective-agency

Website: https://tristatedetectiveagency.com/

Address: 325 Chestnut Street, Suite 800

Contact: (267) 733-6166

Hours: Available 24/7

Handling a sensitive issue like a missing person or suspected infidelity requires an investigator who truly puts your goals first. Tri State Detective Agency stands out for its client-first approach, as the team ties its work closely to the desired outcome.

Their staff brings over 30 years of combined experience from law enforcement and military backgrounds, which gives the work a disciplined feel. 

I also like that they use only in-house investigators rather than subcontractors, which helps with quality control and confidentiality.

One thing to keep in mind, however, is that some initial phone inquiries can feel a bit rocky. A few potential clients have said the phone handling could be smoother, and the owner’s public replies to feedback have occasionally sounded defensive. 

Even so, their digital forensics and secure online portal make them a capable choice for complex local cases.

Pros

  • Client-first mission
  • Multi-state coverage
  • Uses only in-house investigators
  • Advanced digital forensics

Cons

  • Rough phone handling experience
  • Defensive tone in public replies

Customer Reviews

Best decision I’ve ever made

Working with this company was the best decision I’ve ever made. I will always recommend Thomas Nixon as the best detective agency in the whole tri state area. If you’re in any need of detective work use Mr. Nixon. Highly recommend!!!

Handled my case with care and precision

PAs best private detective, i recently had a situation that called for the help of Mr. Nixon and he handled my case with care and precision. From now on this is the only agency i will work with and the one i will recommend to anyone seeking detective services.

2. M. Goldman Investigations

m-goldman-investigations

Website: https://www.mgoldmaninvestigations.com/

Address: 107 W Ridley Ave, Ridley Park

Contact: (800) 505-5423

Hours: Available 24/7

When you need answers right away, an agency with 24/7 availability and free consultations can be a huge relief. M. Goldman Investigations is especially accessible for urgent, time-sensitive matters, and that’s helpful when you’re already stressed.

A close friend of mine consulted with them recently for a complex domestic issue, and their focus on courtroom-ready results felt reassuring, especially when paired with divorce lawyers

Their team is also known for obtaining hard-to-obtain information through computer and cell phone forensics.

The downside is that the initial phone consultation can sometimes feel rushed, leaving some callers feeling interrupted. 

Despite that abrupt first impression, their ability to deliver clear, documented video evidence across Philadelphia and surrounding counties makes them a dependable option.

Pros

  • 24/7 availability
  • Free consultations
  • Legal case specialization
  • Courtroom-ready reports

Cons

  • Phone communication feels rushed
  • Abrupt customer service tone

Customer Reviews

His work is very thorough

Mr. Goldman is an outstanding private investigator. His pre-investigation questions are spot on, his work is very thorough and he’s easy to work with. Overall very professional. If you have need of a private investigation M. Goldman Investigations is a great value.

Best private investigator I have ever worked with

M. Goldman Investigations is the best private investigator I have ever worked with. They are highly skilled and have a vast amount of experience in matrimonial cases. They were able to quickly gather evidence and sort through complex information to help me win my case. I would recommend them to anyone who needs a private investigator.

3. Warstone Detective Agency

warstone-detective-agency

Website: https://www.warstone-investigative-ss.com/

Address: 550 Selmi Street

Contact: (267) 800-9118

Hours: Available 24/7

Navigating a criminal defense case requires a team that understands the strict rules governing evidence collection. 

Notably, Warstone Detective Agency is built around former law enforcement and military professionals, so its process feels structured from the start.

Their use of pre-mission planning brings real investigative discipline to legal and corporate cases. I also like that they position themselves as a partner to legal teams, actively seeking leads others might miss.

They even provide a strong written reporting system, which matters when findings need to hold up in corporate or legal settings. 

However, they place less emphasis on personal or domestic cases and focus more heavily on security and fraud. If you need a standard family investigation, they may not be the most tailored fit.

Pros

  • Military and law enforcement background
  • Structured pre-mission planning
  • Strong background check focus
  • Veteran-driven workforce

Cons

  • Less focus on domestic cases

Customer Reviews

Exactly what we needed!

This team is a group of Army Vets and federal investigators that I served with. Seeing their capabilities is one thing, being on the other side of the table and having to need and use a private investigator is another. Detective G and the boys came through! Gave me and my lawyer exactly what we needed!!! I will recommend Warstone without a thought.

Providing us with the crucial information

We hired warstone to conduct a detailed background check for a sensitive matter, and the service was outstanding. The team was responsive, efficient, and discreet. The final report was comprehensive and delivered promptly, providing us with the crucial information we needed to make an informed decision. It was a far more thorough and reliable result than any online search could have provided.

4. Felder & Associates Investigations Inc.

felder-associates-investigations-inc

Website: https://www.felderinvestigations.com/

Address: 1700 Market Street, Suite 1005

Contact: (267) 507-5448

Hours: Monday-Friday, 8:00 AM – 6:00 PM

Building a strong legal defense often hinges on uncovering evidence that has been buried or overlooked. 

Felder & Associates Investigations Inc. specializes in criminal defense and litigation support, making them a practical partner for attorneys.

I recently spoke with a colleague who used their services, and they were impressed by how smoothly the investigators collaborated with civil litigation lawyers to prepare trial-ready reports. 

Their high-success locate investigation service is another draw, especially because it comes with an accuracy guarantee. 

Just be aware that highly complex cases can extend standard turnaround times, and expedited results cost extra. 

They also follow strict rules on releasing sensitive contact details without proper legal authorization, which supports ethical handling but can slow direct access.

Pros

  • Strong criminal defense focus
  • Courtroom-ready trial preparation
  • Accuracy guarantee for locates
  • Over 20 years of experience

Cons

  • Complex cases take longer
  • Expedited services cost extra
  • Strict rules on releasing info

Customer Reviews

Professional, honest, and provided ample information

I highly recommended hiring Felder & Associates for your investigative needs. Cold calling various companies, I found this gem of a company. The owner Ron went above and beyond explaining to me the logistics of the services I was looking for. Ron was professional, honest, and provided ample information during our consultation session. If you are looking for a company that is upfront and will go the extra mile for their clients look no further!!!

Was handled immediately and very professionally

I had the privilege of using Felder & Associates for a very important situation. With the help of Mr Felder the matter was handled immediately and very professionally. I would recommend using his services for all of your needs that require private investigations, process servers or other needs. I give him 5 stars!

5. Gray Security Investigations

gray-security-investigations

Website: https://graysecurityinvestigations.com/

Address: 443 West Girard Avenue 2A

Contact: (484) 387-5649

Hours: Monday-Friday, 9:00 AM – 5:00 PM

Approaching an investigation with a cookie-cutter mindset rarely gives you the detailed, actionable results you need. Gray Security Investigations (GSI) avoids that by taking a highly personalized, client-focused approach to each case.

With over a decade of experience, their team takes time to understand the situation before building a strategy. They also handle high-demand areas such as fraud and missing persons, making them useful for both personal and business needs.

Because the service is so customized, the scope and timelines can be less predictable than those of agencies with standardized packages. 

Their focus also stays on core investigative services, so they don’t offer the same advanced digital forensics as some competitors. 

Still, their discretion and steady communication make them a reliable local choice.

Pros

  • Over 10 years of experience
  • Handles personal and business needs
  • Strong focus on total discretion

Cons

  • Less predictable service timelines
  • Lacks advanced digital forensics

Customer Reviews

Extremely knowledgeable and professional

My very first time ever using a PI but my investigator was extremely knowledgeable and professional. He provided timely updates and answered any questions I had along the way. During the investigation he was very thorough. Overall, I highly recommend Gray security investigations for any surveillance you may need. I can not attest to any other services. Thanks again your awesome.

Reliable security or investigative services

Gray Security Investigations delivered exceptional service from start to finish. Their communication was clear, timely, and professional. The investigator was thorough, discreet, and went above and beyond to get accurate results. I felt informed throughout the entire process and confident that everything was handled with integrity. Highly recommend GSI for anyone who needs reliable security or investigative services.