Ascent Intelligence Agency
“His good work stopped 14 years of constant court appearances as the judges now had the proof I had been telling them all along.”
Best Private Investigators near East Gwillimbury, ON
1 of these agencies is based in East Gwillimbury; the others serve East Gwillimbury from towns including Markham (31 km), Richmond Hill (30 km) and Barrie (34 km).
2 open 24/7 · 7 open weekends · 6 rated 4.5+
Data verified October 18, 2026
Ace Investigation Corp
CS Investigations
“Clients are met with compassion and understanding and can be confident this is a company that gets the evidence with the ability to think outside the box and explore all angles!”
Investigative Surveillance Group
“I would absolutely use his services again and recommend him to anyone needing private investigation services.”
First Recon Private Investigators
“They were extremely professional and sensitive to my situation, their fees were reasonable, and the personalized service was amazing.”
Invictus Investigations
“Worked with the Invictus team and they provided results that helped me in my situation and would recommend this company to anyone looking for private investigations.”
The 10 agencies shown for East Gwillimbury, ON carry out investigation work: surveillance, tracing, background and asset inquiries. Details of licence, specialties and coverage come from each agency's own website, and ratings and quotes come from public reviews.
Area overview: East Gwillimbury, ON
8 of the 10 agencies on this page have a rating, from 3.4 to 5.0 across 62 reviews; 6 are rated 4.5 or higher. 2 are open around the clock; 7 are open on Saturdays and 6 on Sundays. 5 have ten or more years of experience, the longest 26 years. 2 offer urgent consultations and 1 offers a free initial consultation. We have a website on file for all 10 of the agencies on this page; all 10 publish a contact page and 8 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.
Which investigators listed for East Gwillimbury describe their work online?
All 10 agencies here have a website recorded. That is where a firm sets out its provincial licence, the inquiries it handles, and whether its clients are mostly law firms, insurers or private individuals. The client mix tells you a good deal about how carefully its reports are prepared.
Mitchell Partners Invstgtn Svc
“Honest, transparent and delivered the results I needed.”
King International Advisory Group
Toronto Pi
Aimsiu
Why these companies made our list
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