Investigation Solution Services
“Provided professional, thorough, and reliable support when I needed assistance with a sensitive matter.”
Best Private Investigators in London, ON
10 agencies listed · 6 in London · 4 open 24/7 · 4 open weekends · 6 rated 4.5+
Data verified October 16, 2026
We are still growing
There are too few quality options within 25 km, so we have expanded area of coverage to up to 100 km from you. This includes London and several other cities.
S42 Investigations
“They stay on top of things,,,and are really great at getting back to you.”
Cortese & Associates Private Investigator
“Scott and his team of private investigators did a very efficient job, tracked down the guy and in fact I got full payment that was owing.”
Corporate Investigation Services
“Professional and takes care of people!”
Rivard Investigations
Beaconbridge Workplace Solutions
The 10 agencies shown for London, 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: London, ON
6 of the 10 agencies we list are based in London; the other 4 serve London from Brantford (84 km) and Woodstock (44 km). 8 of the agencies on this page have a rating, from 3.0 to 5.0 across 156 reviews; 6 are rated 4.5 or higher. 4 are open around the clock and 4 are open on weekends. 2 show a licence on their websites. 4 have ten or more years of experience, the longest 29 years. 4 offer urgent consultations and 1 is family- or locally-owned. 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 London 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.
Gotcha Process Serving Services
“She had the documents served within 2 hours of them being sent to her and the Affidavits of Service and Invoice to me the next day, all within less than 24 hours.”
Survail Protection and Investigative Services
“Don Vail and his security staff are consistently going above and beyond to make sure their clients needs are exceeded.”
Protection Security Investigations
“The security Group that is in the market Street in fresh co are doing a great job specially Teagan who has been watching the site and keeping an eye out, I recommend this security company.”
Rainy Day Private Investigative Services
“I've had the opportunity to work with Samuel on multiple cases, including sensitive child custody matters, surveillance operations, and workplace investigations, and I can confidently say he is a true professional in every sense of the word.”
Why these companies made our list
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