Yes. As fully licensed investigators in Ontario, we operate strictly within the law. We use legal methods to gather evidence for personal, corporate, and legal cases.
Get Results with Thornhill’s Leading Private Investigators
We are your trusted team of private investigators, forensic experts, and surveillance specialists serving Thornhill and the surrounding area. With decades of experience and a reputation for delivering court-admissible evidence quickly and discreetly, we help individuals, law firms, and businesses uncover the truth and make informed decisions. Expect timely reporting, complete confidentiality, and results you can rely on.
Private Investigator Services In Thornhill
At Investigation Hotline, we provide discreet and results-driven private investigation services throughout Thornhill and the GTA. With a presence in both York Region and Toronto, our Thornhill investigators are familiar with local neighbourhoods like Bayview Glen and Crestwood–Springfarm–Yorkhill, ensuring fast, tailored support. Our experienced team uses advanced surveillance tools and investigative techniques to support individuals, businesses, and legal professionals.
We deliver fast, confidential results you can trust.

Get clarity and protection in emotionally charged situations. Our team handles sensitive family matters with discretion, compassion, and evidence you can trust.
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Our investigators discreetly monitor subjects using professional surveillance techniques, both on foot and by vehicle. We deliver court-admissible evidence and help locate missing or evasive individuals.
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Protect your business from fraud, internal misconduct, and financial loss. Our investigators provide discreet, evidence-based support for legal, insurance, and employee-related matters.
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Our team uses advanced forensic tools and certified methods to extract, preserve, and present evidence. Whether it’s recovering deleted data or detecting hidden surveillance, we deliver results you can rely on.
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Our team works with corporate clients, law enforcement, and individuals to resolve high-stakes matters globally. Whether you’re dealing with international fraud, missing persons, or legal disputes, we have the experience and network to get results – anywhere.
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Our Proven Investigator Approach & Intelligence Methods
Analysis
We assess client concerns and develop actionable, tailored solutions.
Strategy
We review existing data, identify key issues, and outline a focused plan.
Investigate
We collect evidence, analyze findings, and align with the case strategy.
Reporting
We prepare clear, detailed reports that highlight findings and implications.
Resolution
We guide resolution with clear findings, practical advice, and expert support.
Our Commitment to Confidentiality
At Investigation Hotline, we treat all client information with the highest level of discretion and care. Our strict protocols protect your privacy through every stage of the investigation. We will never mislead, misuse, or share your data—your trust is our priority.
Why Clients in Thornhill Choose Investigation Hotline

Experienced Investigators
With over 30 years of fieldwork in Thornhill and the GTA, our team brings unmatched expertise across legal, corporate, and personal investigations.

Clear, Actionable Results
We provide real evidence that supports your case, not fluff. Our reports are detailed, accurate, and court-admissible.

Trust & Discretion
Your privacy is our priority. We operate with full transparency and never mislead or misrepresent our findings.

Tailored, Methodical Approach
We tailor every investigation to your needs — using proven techniques and technology to deliver the right outcome, fast.
Rated nr.1 in Thornhill

Your Committed & Confidential Thornhill Private Investigators
For something as important as your workplace operations, finances or personal life, you want discretion, a certain degree of privacy and confidentiality. You’ll get that from our experts. We handle all cases with care and precision, upholding our values of honesty, discretion and excellence. We will never violate your confidence and will always act in your best interest, utilizing legal methods to collect information and use it in court. Expect the highest degree of excellence and professionalism with Investigation Hotline.
FAQ about Private Investigator Thornhill
Q1. Is it legal to hire a private investigator in Thornhill?
Q2. What types of investigations do you handle in Thornhill?
We specialize in a wide range of services including cheating partner investigations, business investigations, bug and camera detection, digital forensics, and asset tracing. Click here to view our services.
Q3. Will my investigation remain confidential?
Absolutely. We prioritize discretion and privacy in every case. Your identity and case details are never shared without your explicit consent.
Q4. How quickly can I get results?
Turnaround time depends on the complexity of the case, but we pride ourselves on efficient, timely reporting. Urgent matters can often be prioritized.
Q5. How much does it cost to hire a private investigator in Thornhill?
Costs vary depending on the scope of the investigation. We offer transparent pricing and will provide an estimate after a free initial consultation.
Featured Private Investigator Case Studies
Learn How Our Private Investigators In Thornhill Can Help You
Some of Our Partners in Private Investigations
Investigation Hotline’s trusted partner agencies include: Investigation Plus, Top Tier Investigations, MadPI Consulting & Investigations, O.B.N. Security, Spy Depot Security Inc., Providence Investigations, Ltd, Precision Institute of Protective Measures,G.P. Ospreay & Associates and Divorce Angels. We work only with well reputed and most trusted private investigators Toronto Ontario and Canada.